Pressure

Using solid state technology, the Series 3000MR/3000MRS Photohelic® Switch/Gages combine the functions of a precise, highly repeatable differential pressure switch with a large easy-to-read analog pressure gage employing the durable, time-proven Magnehelic® gage design. Switch setting is easy to adjust with large external knobs on the gage face. Gage reading is unaffected by switch operation - will indicate accurately even if power is interrupted. Solid state design now results in greatly reduced size and weight. Units can be flush mounted or surface mounted with hardware supplied. 3000MR models employ versatile electromechanical relays with gold over silver contacts - ideal for dry circuits. For applications requiring high cycle rates, choose 3000MRS models with SPST (N.O.) solid state relays. All models provide both low and high limit control and include 18-inch (45 cm) cable assemblies for electrical connections.
Compatible with air and other non-combustible, non-corrosive gases, they can be used in systems with pressures to 25 psig (1.725 bar). Optional construction is available for use to either 35 psig (2.42 bar) or 80 psig (5.51 bar).
Included Accessories: mounting ring, snap ring; 18" (45 cm) cable assembly; (2) 3/16" tubing to 1/8" NPT adapters; (2) 1/8" NPT pipe plugs; (4) 6-32 x 1-1/4" RH machine screws (panel mounting); and (3) 6-32 x 5/16" RH machine screws (surface mounting).

Features:

• Gage reading unaffected by switch operation and will continue to read pressure even during power loss
• Zero and range adjustments outside of gage means no disassembly in normal service
• Solid-state design allows for switching in high cycle rate applications without degradation

Combining clean design, small size and low cost with enough accuracy for all but the most demanding applications our Series 2-5000 Minihelic II Differential Pressure Gage offers the latest in design features for a dial type differential pressure gage. It is our most compact gage but is easy to read and can safely operate at total pressures up to 30 psig.

Application:

• Room Positive Pressure Sensing
• Local Indication on Filter Status
• Face Velocity on Fume Hood
• Duct Pressures
• Cabinet Air-Purging
• Air Samplers
• Electronic Air Cooling Systems
• Laminar Flow Hoods

Features:

• Removable lens and rear-housing provides easy, cost-effective servicing
• Accuracy and value provides an excellent solution for OEM and user applications
• Durable housing materials make it well-suited for rough environments and total high pressure

Select the Series 2000 Magnehelic® Gage for a versatile low differential pressure gage with a wide choice of 81 models and 27 options to choose from. Using Dwyer’s simple, frictionless Magnehelic® gage movement, it quickly indicates air or noncorrosive gas pressures--either positive, negative (vacuum) or differential. The design resists shock, vibration, over-pressures and is weatherproof to IP67. Select the -HA High Accuracy Magnehelic® Gage option for an accuracy within 1% of full scale, located below in the Product Configurator. Also included with the –HA option at no extra cost are a mirrored scale overlay and a 6 point calibration certificate.

Features:

• Easy to read gage through undistorted plastic face permits viewing from far away
• Patented design provides quick response to pressure changes means no delay in assessing critical situations
• Durable and rugged housing and high-quality components combine to provide longservice life and minimized down-time
• High accuracy option is twice as accurate as the standard Magnehelic® gage.
• Bezel provides flange for flush mounting in panel.
• Clear plastic face is highly resistant to breakage. Provides undistorted viewing of pointer and scale.
• Precision litho-printed scale is accurate and easy to read.
• Red tipped pointer of heat treated aluminum tubing is easy to see. It is rigidly mounted on the helix shaft.
• Pointer stops of molded rubber prevent pointer over-travel without damage.
• "Wishbone" assembly provides mounting for helix, helix bearings and pointer shaft.
• Jeweled bearings are shock-resistant mounted; provide virtually friction-free motion for helix. Motion damped with high viscosity silicone fluid.
• Zero adjustment screw is conveniently located in the plastic cover, and is accessible without removing the cover. O-ring seal provides pressure tightness.
• Helix is precision made from an alloy of high magnetic permeability. Mounted in jeweled bearings, it turns freely, following the magnetic field to move the pointer across the scale.
• Calibrated range spring is flat spring steel. Small amplitude of motion assures consistency and long life. It reacts to pressure on diaphragm. Live length adjustable for calibration.
• Silicone rubber diaphragm with integrally molded O-ring is supported by front and rear plates. It is locked and sealed in position with a sealing plate and retaining ring. Diaphragm motion is restricted to prevent damage due to overpressures.
• Die cast aluminum case is precision made and iridite-dipped to withstand 168 hour salt spray corrosion test. Exterior finished in baked dark gray hammerloid. One case size is used for all standard pressure options, and for both surface and flush mounting.

The Series 605 Magnehelic® Indicating Transmitter provides for both visual monitoring and electronic control of very low differential pressure. The Series 605 is ideal for control applications in building HVAC systems where local indication is desired during routine maintenance checks or necessary when trouble shooting the system. The easily read dial gage is complimented by the two-wire, 4 to 20 mA control signal utilizing the time-proven Dwyer® Magnehelic® gage mechanical design and Series 600 transmitter technology. The two-wire design with terminal strip on the rear simplifies connection in any 4 to 20 mA control loop powered by a 10 to 35 VDC supply.

Applications:

• Monitor pressures in ducts, rooms, or total building pressures
• Filter monitoring
• Local indication of clean room pressures with process signal sent to control room

Features:

• Easy to read gage permits viewing from far away
• Patented design provides quick response to pressure changes means no delay in signaling and alerting to critical situations
• Durable and rugged housing and high-quality components combined provides long-service life and minimized down-time
• Optional stainless steel bezel is the same installation diameter as Magnehelic® gage and simplifies field upgrade to 605 indicating transmitter

The Series DX Wet/Wet Differential Pressure Switch makes a contact output based on the differential between two pressure sources. Wetted materials of brass and fluoroelastomer are suitable for use with most gases and water based solutions. The switch can be used for low differential pressure indication with set point on a decrease of pressure as low as 1 psid (0.07 bar). Differential set point ranges are available from 2.5 to 75 psid (0.17 to 5.17 bar) on increasing differential pressure and 1.0 to 67 psid (0.07 to 4.62 bar) on decreasing differential pressure. Unit features a high static pressure rating of 200 psig (13.8 bar). Weatherproof, UL type 4X, enclosure for dust laden, outdoor, or wash-down installation environments. Externally adjustable set point, integral mounting flange and a removable electrical terminal block for quick and easy installation.

Applications:

• Indicating filter condition
• Proof of flow indicator monitoring
• Proving flow through a pump
• Proving flow through a chiller
• Proving flow through a heat pump or AC unit

Features:

• Differential pressure switch that is suitable for most gas and water-based applications allows multiple uses in the most sophisticated designs
• Weatherproof housing provides protection in the harsh, wet or dirty environments ensuring switch’s long-service life
• Removable terminal block reduces installation time

The Series ADPS/EDPS Adjustable Differential Pressure Switch is designed for pressure, vacuum, and differential pressures. The dual scaled adjustment knob in inches water column and pascals allows changes to the switching pressure to be made without a pressure gage. The ADPS/EDPS is available with settings from 0.08 in w.c. (20 Pa) up to 20 in w.c. (5000 Pa). The silicone diaphragm and PA 6.6 body make the series ADPS ideal for use with air and other noncombustible gases. Series EDPS models meet UL508 and are constructed of plenum rated plastics. The compact size, adjustment knob and low cost make the ADPS/EDPS the perfect choice for HVAC applications.

Application:

• Monitoring air filters and ventilators
• Monitoring industrial cooling-air circuits
• Overheating protection for fan heaters
• Monitoring flows in ventilation ducts
• Controlling air and fire-protection dampers
• Frost protection for heat exchanges

Features:

• Adjustment knob changes switching pressure easily with a pressure gage reducing components for application
• Low cost device makes it an excellent solution in BAS and HVAC applications requiring duct control and monitoring
• Relay contact allows simple integration with DDC or building systems

The Series 629C Wet/Wet Differential Pressure Transmitter monitors differential pressure of air and compatible gases and liquids with 0.5% accuracy. The design employs dual pressure sensors converting pressure changes into a standard 4 to 20 mA output signal or field selectable voltage. Small internal volume and minimal moving parts result in exceptional response and reliability. The terminal block, as well as a zero adjustment button, are easily accessed under the top cover.
The Series 629C, with the optional factory installed remote sensors, are connected to the unit, either via armored or shielded cable and available in 10 and 20' lengths. Installation is much simpler, reducing labor and material cost versus traditional copper piping installations and no need for valve manifolds. The 629C family has a robust NEMA 4X (IP66) construction, which is also available with an integral LCD for localized data monitoring and with a remote sensor option.

Features:

• Powered by either DC or AC - take advantage of most readily available power source reducing installation costs
• Optional LCD does not need a separate power supply - lowers installed cost
• Selectable voltage range - provides flexible choice for changing design or inputs for process/HVAC controllers being used to monitor and control
• Push button zero (versus trim pot) - more simple zeroing provides easy install and calibration reducing installation time and possibility of operator error
• Optional LCD indicator provides local status to identify operational condition
• Remote sensor option reduces installation labor and material

The Series 629HLP Differential Pressure Transmitters are suitable for measuring over-pressure, under-pressure, and differential pressure in compatible gases and liquids with 1% accuracy. The 629HLP is suitable for all measuring tasks in commercial, industrial or sanitary applications. Its single sensor design allows it to measure small increment pressure changes, and converts them to a linear analog output signal from 4 to 20 mA or 0 to 10 VDC.

Applications:

• Heat exchangers
• Fan coils/air handlers
• Core testing applications
• Hydraulic systems
• High line pressures/low DP
• Pumps
• Commercial/industrial processes
• Sanitary process

Features:

• Rugged, versatile, high accuracy device
• For liquid or gas systems requiring precise measurements
• Provide excellent response and reliability
• Suitable for static and dynamic measurements
• Converts pressure changes into 4 to 20 mA or 0 to 10 VDC output
• Compact, lightweight, capable to be installed in any arrangement making installation very simple
• Capable to handle up to 360 psi (25 BAR)

The Series DCGII Digital Calibration Pressure Gage offers a complete pressure gage with calibration capabilities. With a precise 0.05% full scale accuracy and large 5 digit resolution, this gage can be used in critical industrial applications where precision is most important. This versatile gage only requires one 9V battery or power adapter and can operate up to 5,000 working hours. The Series DCGII 0.05% Digital Pressure Gage can display percent of range, pressure swings or alarm set points. This pressure gage comes complete with eleven selectable pressure units, backlight and zeroing capability.

Applications:

• Field gage calibration
• Permanent installation
• Burst disc testing
• Torque data logging
• Pressure regulator testing and hydrostatic leak testing

Features:

• Highest accuracy provides exceptional measurement for calibration minimizing costly out of specification conditions
• Stainless steel housing resists ambient corrosion for longer service life in harsh environments
• Lightweight and slim, yet large easy to read battery-powered gage make them easy to carry and read
• Specified with high ambient temperature rating means more robust uses and longer service-life
• Indicator can display pressure swings, minimum and maximum peak detection with alarm set points provides a multipurpose tool where critical calibration is needed

The Series DH3 Digihelic® Differential Pressure Controller is a 3-in-1 instrument possessing a digital display gage, control relay switches, and a transmitter with current output all packed in the popular Photohelic® gage style housing. Combining these 3 features allows the reduction of several instruments with one product, saving inventory, installation time and money. The Digihelic® controller is the ideal instrument for pressure, velocity and flow applications, achieving a 1.5% full scale accuracy on ranges down to the extremely low 0.25" w.c. to 2.5" w.c. full scale. Ranges of 5" w.c. and greater maintain 0.5% F.S. accuracy. Bi-directional ranges are also available.
The Series DH3 Digihelic® controller allows the selection of pressure, velocity or volumetric flow operation in several commonly used engineering units. 2 SPDT control relays with adjustable deadbands are provided along with a scalable 4-20 mA process output.
Programming is easy using the menu key to access 5 simplified menus which provide access to: security level; selection of pressure, velocity or flow operation; selection of engineering units; K-factor for use with flow sensors; rectangular or circular duct for inputting area in flow applications; set point control or set point and alarm operation; alarm operation as a high, low or high/low alarm; automatic or manual alarm reset; alarm delay; view peak and valley process reading; digital damping for smoothing erratic process applications; scaling the 4-20 mA process output to fit your applications range and field calibration.

Features:

• 3-in-1 instrument allows the reduction of several instruments with one product, saving inventory, installation time and money
• Full scale accuracy of 1.5% even on extremely low ranges, and 0.5% for ranges above 5 in w.c. provide for greater measurement precision
• Secure menu program provides access to device operation only for the right skill level

The Series 3400 Smart Pressure Transmitter is a microprocessor-based high performance transmitter, which has flexible pressure calibration, push button configuration, and is programmable using HART® Communication. The Series 3400 is capable of being configured with the zero and span buttons (a field calibrator is not required for configuration). The transmitter software compensates for thermal effects, improving performance. EEPROM stores configuration settings and stores sensor correction coefficients in the event of shutdowns or power loss. The Series 3400 can be configured to be ATEX or IECEX approved for use in hazardous (classified) locations. The rangeability allows the smart transmitter to be configured to fit most applications.

The Series MS Magnesense® Differential Pressure Transmitter is an extremely versatile transmitter for monitoring pressure and air velocity. This compact package is loaded with features such as, field selectable English or metric ranges, field upgradeable LCD display, adjustable dampening of output signal (with optional display) and the ability to select a square root output for use with Pitot tubes and other similar flow sensors.
Along with these features, the patented magnetic sensing technology provides exceptional long term performance and enables the Magnesense® Differential Pressure Transmitter to be the single solution for your pressure and flow applications.

Features:

• Field selectable English or Metric ranges
• Field upgradeable LCD display
• Adjustable damping of output signal (with optional display)
• Ability to select a square root output for use with pitot tubes and other similar flow sensors

The Series MSX Pro Magnesense® Differential Pressure Transmitter is the professional differential pressure transmitter meeting stringent industry standards with innovative global product design. The device has exceptional stability for use in critical building performance applications with the popular versatility of our original Series MS2 Magnesense® II transmitter. The MSX Pro simplifies the ordering process to deliver the desired configuration, which reduces product setup time. Pressure ranges of Pa, mm w.c., and in w.c. are available per device. All pressure ranges can be configured in unidirectional or bidirectional modes providing a total of 32 ranges. The MSX Pro transmitter can provide a linear pressure output or a linear velocity output with the square root extraction from the transmitter. Additional parameters have been included to expand the square root capability to calculate flow. Dual voltage and milliamp output signals can be used to provide control and equipment output signal verification.

Applications:

• High performance building applications for critical environments
• Filter monitoring in air handler units
• Building pressure in pharmaceutical/semiconductor clean rooms
• Air velocity/flow in VAV systems
• Duct static pressure in commercial and specialized buildings

Replace your outdated analog gages with the new Series DPG Digital Pressure Gage. The Series DPG has a high ±0.25% or ±0.5% full-scale accuracy. The 4 digit digital display will reduce the potential for errors in readings by eliminating parallax error commonly produced with analog gages. Series DPG is battery powered and has an auto-shut off to conserve battery life. Battery life, on average, will last 2000 hours. A 4 button key pad allows easy access to features without the need to work through complex menus or difficult key combinations. These features include backlight, peak and valley, tare or auto zero and conversion of the pressure units.

Applications:

• Process applications
• Replacement for legacy analog gages
• OEM applications

Features:

• High accuracy provides exceptional measurement minimizing costly out of specification conditions
• Backlit 4-digit display provides clear parallax-free reading reducing potential for errors
• Battery-powered gage with auto-shutoff eliminates wiring and prolongs battery life reducing service calls
• Push-button zero reduce installation and service time

Mercoid® Series 3100D Smart Pressure Transmitter is a microprocessor-based high performance transmitter, which has flexible pressure calibration, push button configuration, and programmable using HART® Communication. The Series 3100D is capable of being configured for differential pressure or level applications with the zero and span buttons. A field calibrator is not required for configuration. The transmitter software compensates for thermal effects, improving performance. EEPROM stores configuration settings and stores sensor correction coefficients in the event of shutdowns or power loss. The Series 3100D is FM or ATEX approved for use in hazardous (classified) locations. The 100:1 rangeability allows the smart transmitter to be configured to fit any application.

Applications:

• Flow measurement
• Level monitoring
• Filter or pump differential pressure
• Critical process monitoring

Features:

• Configurable using zero/span buttons means no calibrator required reducing time to install and running
• Range-ability and selectable engineering units, allows transmitter to fit many applications reducing the number of different transmitters to meet specifications
• High accuracy (±0.075%) provides exceptional measurement for ensuring tight control and minimizing costly out of specification conditions
• Automatic sensor temperature compensation improves performance of device for accurate measurement under different operating environments
• Fail-mode process function stores configuration settings in the event of shutdown or power-loss provides for faster restart to getting application back on-line
• A HART® Communication programmable device provides a reliable, long-term solution for plant operators who seek the benefits of intelligent devices with digital communication

The Series DPGWB/DPGAB Pressure Gages offer 0.5% full scale accuracy in a rugged, easy-to-use unit at prices comparable to mechanical gages. The DPGWB stainless steel wetted material makes it suitable for a wide variety of liquids or gases. The gages feature user-selectable units of measure allowing one gage to be used for a variety of pressure scales. The DPGWB/DPGAB come with a protective rubber boot to protect against short drops and rough handling.

Applications:

• Ideal for checking line pressures at system startup.
• Process applications
• Process start-up
• OEM applications

Features:

• Push-button zero reduce installation and service time
• High accuracy provides exceptional measurement for minimizing costly out of specification conditions
• Selectable unit button provides reading in easily recognizable units

The Series MS2 Magnesense® II Differential Pressure Transmitter combines stable piezo sensing technology with the additional features to reduce installation time and simplify ordering. Like the original Series MS, the second generation transmitter can be used as a linear pressure output or a linear velocity output with the square root extraction done in the transmitter. Additional parameters have been included on the MS2 to expand the square root capability to include flow measurements.

Features:

• Field selectable ranges and output signal reduce inventory and the chances of ordering an incorrect part
• BACnet® or Modbus® serial communications reduce wiring cost by daisy-chaining the transmitters
• Our integral field-upgradeable display or plug-in remote display tool save upfront material cost and allow for local viewing of measurements

The Series MSX Magnesense® Differential Pressure Transmitter combines the stability and versatility of the original Series MS2 Magnesense® II transmitter for use in building control applications. The MSX simplifies the ordering process to deliver the desired configuration, which reduces product setup time. Pressure ranges are available in Pa, mm w.c., and in w.c. All pressure ranges can be configured in unidirectional or bidirectional modes, providing a total of 32 ranges. The MSX transmitter can provide a linear pressure output or a linear velocity output with the square root extraction from the transmitter. Additional parameters have been included to expand the square root capability for calculating flow. Dual voltage and milliamp output signals can be used to provide both control and equipment output signal verification.

Features:

• Rotatable 180° display for ease of reading
• Optional toolless terminal block allows for quick and easy wiring
• UL94 V-0 and plenum ratings that add safety to a variety of applications

The Series 3500 Smart Differential Pressure Transmitter is a microprocessor-based high performance transmitter, which has flexible pressure calibration, push button configuration, and is programmable using HART® Communication. The Series 3500 is capable of being configured for differential pressure or level applications with the zero and span buttons. A field calibrator is not required for configuration. The transmitter software compensates for thermal effects, improving performance. EEPROM stores configuration settings and stores sensor correction coefficients in the event of shutdowns or power loss. The Series 3500 can be configured to be ATEX or IECEX approved for use in hazardous (classified) locations. The rangeability allows the smart transmitter to be configured to fit any application.

Applications:

• Flow measurement
• Level monitoring
• Filter or pump differential pressure
• Critical process monitoring

Features:

• Completely Configurable using zero/span buttons (no calibrator required)
• Fail-mode process function
• Automatic ambient temperature compensation

The Series DHII Digihelic® Differential Pressure Controller takes all the features of the standard Digihelic® Pressure Controller and packages them in a robust NEMA 4 (IP66) housing.

The Digihelic® II Pressure Controller combines the 2 SPDT control relays, 4-20 mA process output and Modbus® communications with a large, brightly backlit 4 digit LCD display that can easily be seen from long distances. The electrical wiring has also been enhanced in the DHII with its detachable terminal blocks. The removable terminals allow the install to easily wire the terminal block outside the housing and then attach to the circuit board, reducing wiring difficulties and installation time on the process.

The Digihelic® II Differential Pressure Control in the NEMA 4 (IP66) enclosure enables this product to be the perfect choice when mounting pressure controls outdoors in such applications as rooftop air handlers. This housing also makes it the ideal solution for surface mounting in clean rooms or facilities where water or a cleaning solution is utilized in maintaining plant cleanliness.

Features:

• NEMA 4 housing enables a range of uses both outdoors or indoors where water is present
• Large backlight LCD display provides local reading from a distance
• Detachable terminal blocks reduce wiring difficulties saving installation time

The ATEX/IECEx Approved Series AT2MS Magnesense® Differential Pressure Transmitter is an extremely versatile transmitter for monitoring pressure and air velocity in hazardous areas. This transmitter is loaded with features such as: field selectable English or metric ranges, field upgradeable LCD display, adjustable dampening of output signal and the ability to select a square root output for use with pitot tubes and other similar flow sensors. Along with these features, the magnetic sensing technology provides exceptional long term performance and enables the Magnesense® transmitter to be the solution for a myriad of pressure and flow applications. Flame-proof enclosures are available in aluminum and can include a glass window for viewing process on the LCD.

Important notes for installation:

• Cables must be fitted through 1/2" NPT cable gland or ATEX/IECEx conduit (not supplied with instrument).
• Make sure after cabling to close tight cover and cable gland, in order to keep IP66 rating (IP65 with option OPV, overpressure relief valve).
• Open cover only after de-energizing instrument.
• Attention: Check local safety rules and warnings on unit and manual for a correct use of the instrument in hazardous area.

Application:

• Monitor pressures in ducts, rooms, or total building pressures
• Filter monitoring
• Local indication of clean room pressures with process signal sent to control room
• Hazardous area pressure measurement and transmitter

Features:

• ATEX housing provides all the capabilities and value of the MS2 in a flame & explosion proof enclosure
• Durable and rugged housing and high-quality components combined provides longservice life and minimized down-time
• High impact strength and high temperature rated for applications where hazardous environments exist

The Series ISDP Differential Pressure Transmitter provides a 4-20 mA process output, a robust NEMA 4X enclosure, plus a large LCD display that can be programmed to read in pressure, velocity or flow. The ISDP offers simplified programming via a Menu key that enables the user to select: security level; English or Metric engineering units; pressure, velocity or flow operation, K-factor for use with various Pitot tubes and flow sensors, circular or rectangular duct size for volumetric flow operation plus many more. The Series ISDP Differential Pressure Transmitter is powered on its two wire loop with 10-35 VDC via its integral M-12 four pin male connector. The ISDP provides a 0.5% full scale accuracy on ranges from 0.25" w.c. to 100" w.c. as well as bi-directional models up to 10" w.c. These features make the Series ISDP Differential Pressure Transmitter the ideal instrument for monitoring pressures or air flows in hazardous zones having a Class I Div. I Groups A, B, C, D; Class II Div. I Groups E, F, G; Class III Div. I ratings.

Features:

• NEMA 4X rated enclosure provides protection in harsh environments permitting outdoor monitoring or in areas where dust and particulate matter exists
• Easy to read LCD display provides immediate local alerts allowing corrective action to be taken quicker to eliminate the problem from becoming widespread
• Intrinsically safe for use in the specified hazardous locations meets specifications where pressure transmission and safety cannot be compromised
• Password protected set up menu helps to insure no errors by untrained personnel when accessing the powerful measurement capabilities of this device

The Series DPG-200 Digital Pressure Gage has a precise ±0.25% full scale accuracy. The 4 digit digital display will reduce the potential for errors in readings by eliminating parallax error commonly produced with analog gages. The DPG-200 is packaged in a durable extruded aluminum case designed to meet NEMA 4X (IP66). The unit is powered by 12-24 VDC/VAC and contains two alarm set points along with a 4-20 mA process output. A four-button keypad allows easy access to features. These features include backlight, peak and valley, auto zero and conversion of the pressure units.

Applications:

• Level Control
• Pump Control
• Process Control
• Compressor Control

Features:

• High accuracy provides exceptional measurement minimizing costly out of specification conditions
• Backlit 4-digit display provides clear parallax-free reading reducing potential for errors
• Durable aluminum case to meet NEMA 4X (IP66) requirements supports use in harsh or outdoor environments
• Push-button zero reduce installation and service time

The Series DH Digihelic® Differential Pressure Controller is a 3 in 1 instrument possessing a digital display gage, control relay switches, and a transmitter with current output. The Digihelic® controller is the ideal instrument for pressure, velocity and flow applications, achieving a 0.5% full scale accuracy on ranges from 0.25 to 100 in. w.c.

The Digihelic® controller allows the selection of pressure, velocity or volumetric flow operation in several commonly used engineering units. Two SPDT control relays with adjustable dead bands are provided along with a scalable 4-20 mA process output. In velocity of flow modes, a square root output is provided on the 4-20 mA signal to coincide with the actual flow curve. The Series DH provides extreme flexibility in power usage by allowing 120/220 VAC and also 24 VDC power which is often used in control panels.

Programming is easy using the menu key to access 5 simplified menus which provide access to: security level; selection of pressure, velocity or flow operation; selection of engineering units; K-factor for use with flow sensors; rectangular or circular duct for inputting area in flow applications; set point control or set point and alarm operation; alarm operation as a high, low or high/low alarm; automatic or manual alarm reset; alarm delay; view peak and valley process readings; digital damping for smoothing erratic process applications; scaling the 4-20 mA process output to fit your application's range; Modbus® communications; and field calibration. With all this packed into one product it is easy to see why the Digihelic® controller is the only instrument you will need for all your pressure applications.

Application:

• SCFM duct flow
• Industrial ovens air flow
• Filter status
• Clean room pressurization
• Fume hood air flow
• Surgical and medical room pressurization
• Damper and fan control

Features:

• 3-in-1 instrument allows the reduction of several instruments with one product, saving inventory, installation time and money
• Velocity of flow modes, a square root output coincides with the actual flow curve for greater precision
• Power usage of 120/220 VAC or 24 VDC provides flexibility to incorporate device in control panel
• Secure menu program provides access to device operation only for the right skill level
• Modbus® communications supports Process and HVAC system integration and control

The Series 616KD Differential Pressure Transmitters with One-Touch® Digital Push- Button Calibration Technology are designed for simplicity, making them the ideal choice for installers and maintenance professionals. These instruments not only alleviate cumbersome turn pots typically found in most transmitters, but eliminate entirely the need to span the instruments during calibration. With a single digital push button, both ZERO AND SPAN are calibrated properly, nothing else is required. No additional reference pressure sources or separate calibration devices are necessary.

Features:

• Simple calibration push-button sets back zero and span, saving time installing and over the service life
• Cost effective and compact device suitable for OEM applications where space, simplicity, and value are key
• Ranges and accuracy selection cover a wide range of applications minimizing components and determining standardizing on design
• Optional 1/8" NPT process connection allows for use with metal barbed fittings or compression fittings for use with metal tubing
• Optional plenum rated units meeting UL Standard 2043 are available

The Dwyer Series DM-2000 Differential Pressure Transmitter senses the pressure of air and compatible gases and sends a standard 4-20 mA output signal. The DM-2000 housing is specifically designed to mount in the same diameter cutout as a standard Magnehelic® gage. A wide range of models are available factory calibrated to specific ranges.
Pressure connections are inherent to the glass filled plastic molded housing making installation quick and easy. Digital push-button zero and span simplify calibration over typical turn-potentiometers. An optional 3.5 digit LCD shows process and engineering units. A single push button allows field selection of 4 to 6 engineering units depending on range.

Applications:

• Filter monitoring
• Fan pressure indication
• Static pressures in ducts or buildings
• Bi-direction ranges ideal for sensing fluctuating building pressure

Features:

• Zero and span controls provide easy calibration checks and shorter installation time to get device running and monitoring
• Quick response to pressure changes means no delay in signaling and alerting to critical situations
• Easy to read LCD display provides immediate local alerts allowing corrective action to be taken quicker to eliminate the problem from becoming widespread
• Same size as Magnehelic simplifies field upgrade to digital pressure gage by reducing install steps
• Tamper proof button configuration to prevent accidental changes to the settings

The Mercoid® Series 3200G Smart Pressure Transmitter is a microprocessor-based high performance transmitter, which has flexible pressure calibration, push button configuration, and programmable using HART® Communication. The Series 3200G is capable of being configured with the zero and span buttons, a field calibrator is not required for configuration. The transmitter software compensates for thermal effects, improving performance. EEPROM stores configuration settings and stores sensor correction coefficients in the event of shutdowns or power loss. The Series 3200G is FM approved for use in hazardous (Classified) locations. The 100:1 rangeability allows the smart transmitter to be configured to fit any application.

Applications:

• Water and wastewater
• Chemical and petrochemical
• Pulp and paper
• Oil and gas
• Food and beverage

Features:

• Completely configurable using zero/span buttons (no calibrator required)
• Automatic ambient temperature compensation
• Fail-mode process function