Air Quality

The Series SL-2000 Duct Smoke Detector is crucial for early detection of smoke and products of combustion present within HVAC ductwork. This series can be utilized in many different types of applications including commercial, industrial, and residential. The unit is designed to not only alarm when smoke is detected, but will also utilize relays to disable fans and blowers. The series comes complete with technician friendly “No-Tools Required” features to make installation and servicing simple and efficient.

Applications:

• Early smoke detection in ductwork
• Commercial/Industrial/Residential HVAC
• BAS automation

Features:

• Operates in air speeds of 100 to 4000 ft/min
• Transparent cover to view detector head LED
• Patented “No-Tools Required” front or rear loading and removing sampling/exhaust tubes
• Integrated smoke test port

The MODEL AAFS Adjustable Air Flow Switch is capable of detecting a wide range of air velocities with minimal user calibration. Quality features include a stainless steel vane, galvanized steel base, and ABS enclosure.

The Model OSC-200 Omnidirectional Occupancy Sensor automatically controls a HVAC ventilation system. A spherical Fresnel lens provides a 360° detection zone with the use of infrared technology. The integrated dual delay processor saves energy by eliminating false activation due to short-term occupancies. The Model OSC-200 is designed to be ceiling mounted, and is pre-wired for ease of installation.

Features:

• Delay processor suppresses switch activation during momentary occupancy

The Series AVUL Air Velocity Transmitter quickly and accurately measures air velocity or volumetric flow in imperial or metric units. Simultaneous current and voltage outputs on all models provide universal inputs to monitoring equipment while the output range, units, and 0 to 5/10 VDC output can be configured via local DIP switches. The optional integral display, or the portable remote display tool, provide a convenient way to locally monitor process values and configure the unit.

Models are available in 3% and 5% accuracy models to suit a variety of needs, and the optional BACnet MS/TP or Modbus® RTU/ASCII communication protocol allows units to be daisy-chained while providing access to all of the velocity and flow data, as well as additional information such as air temperature.

Features:

• Sensing elements have been coated with an engineered conformal coating to ensure durability and longevity
• Field selectable ranges can be quickly configured without power to the unit

The Series RHP Temperature and Humidity Transmitter combine the voltage or current humidity transmitter output with a passive temperature thermistor or RTD output. Featuring polymer capacitance humidity sensors, models are available in 2%, 3% or 5% accuracies. Duct mounted transmitters are available with an optional two-line alpha numeric LCD display.

Applications:

• Air economizers
• Outdoor temperature and relative humidity reference
• Pool room humidity monitoring

The Series CDWP Carbon Dioxide Transmitters accurately monitor the CO2 concentration in industrial, agricultural, and indoor environments to help achieve energy savings. The IP54 die cast aluminum housing was designed for harsh environments making it ideal for animal husbandry and HVAC mechanical rooms. For increased sensor life and accuracy, a single-beam dual-wavelength non-dispersive infrared (NDIR) sensor is used to eliminate light source aging affects. This sensing technology provides the highest level of accuracy compared to Automatic Baseline Correction methods, which can unintentionally shift the calibration based on CO2 levels and barometric pressure conditions.

Applications:

• Animal Husbandry
• Mechanical Room
• CO2 Refrigeration Monitoring
• Greenhouses

Features:

• IP54 aluminum housing
• Gray finish designed to withstand 168 hour salt spray test
• Single-beam dual-wavelength sensor automatically corrects for aging effects
• Measures unfiltered light intensity directly and eliminated error from incorrect assumptions of gas concentration in theoretical logic assumption methods
• Universal outputs to work with any building management

The Series CDT Carbon Dioxide and Temperature Transmitters accurately monitor the CO2 concentration and temperature in indoor environments to help achieve energy savings. For increased sensor accuracy, a single beam dual wavelength nondispersive infrared (NDIR) sensor is used to automatically correct the measurement in both occupied* and unoccupied buildings against light source aging effects. The single beam dual wavelength sensor technology provides the highest level of accuracy compared to Automatic Baseline Correction methods which can unintentionally shift the calibration based on CO2 levels and barometric pressure conditions. In order to achieve a higher level of accuracy, the Series CDT includes digital barometric pressure adjustment and the ability to field-calibrate the sensor. For applications that require visual indication, the wall mount configurations of the Series CDT can be ordered with an integral LCD display. Push buttons are standard on all configurations of the transmitters for access to the menu structure, but wall mount configurations can be ordered without the buttons. To prevent tampering, the action of the buttons can be locked out using an internal dip switch selection.

Applications:

• Demand control ventilation in schools, office buildings, hospitals, and other indoor environments
• LEED® certification

Features:

• Single beam dual wavelength NDIR sensor eliminates draft due to light source aging
• Integral passive temperature outputs reduce number of devices mounted in the space
• Service display tool available for models without an integral LED
• Optional integral display and relay output

The Series CDTA Communicating Carbon Dioxide Detector combines the function of three room sensors into a single, compact housing. Parameters include carbon dioxide, humidity, temperature, and temperature set point with override. By having field selectable Modbus® and BACnet Communications, only four wires are needed for power and the communication signal. The communicating detectors can be daisy chained together to further reduce installation cost. In order to reduce the set up time, the RS-485 MAC address is set up using on board dip switches. A second set of dip switches are used to select whether output is Modbus® RTU or BACnet MS/TP communication protocols and to limit access to the set up menu. Like our Series CDT Carbon Dioxide Transmitter, the Series CDTA uses a Single Beam Dual Wavelength Non-Dispersive Infrared (NDIR) sensor to measure the carbon dioxide level. This technology can be used in installations that will be occupied 24 hours per day. For improved accuracy, the transmitter can be field calibrated to the environmental conditions of the installation. Also, the barometric pressure can be programmed to correct for altitude. The humidity uses a capacitive polymer sensor and the temperature is measured using a 10KO thermistor sensor. The humidity sensor is field replaceable without the need for additional calibration. Optional local and remote displays are available to display any of the parameters. For applications in which the building occupants aren’t familiar with CO2 concentrations, the LCD can be programmed to display temperature, humidity, or temperature set point instead.

Applications:

• Demand control ventilation in schools, office buildings, hospitals, and other indoor environments
• LEED® certification

Features:

• Field selectable Modbus® and BACnet communications reduces wiring
• Single-beam dual-wavelength CO2 sensor
• Replaceable humidity/temperature sensor
• Physical hardware lockout
• Optional remote display tool
• Digital Intelligent Temperature Compensation Algorithm (DITCA) corrects for errors due to self heating effects of combination wall sensors

The Series CMT200 Carbon Monoxide Transmitter provides a field selectable current or voltage output that is proportional to the gas concentration in underground parking garages, vehicle maintenance facilities, or mechanical rooms. A field replaceable, electrochemical sensor provides accurate readings for up to 4 years with proper calibration. Field calibration can be done by using Model GCK-200CO-2000CO2 calibration gas, Model A-507A calibration adapter, and the on board span and zero potentiometers.

Features:

• Field selectable current or voltage outputs
• Replaceable sensor
• Field calibration kits

The Model CMS300 Carbon Monoxide Transmitter and Switch provides a field selectable current or voltage output that is proportional to the carbon monoxide concentration in underground parking garages, vehicle maintenance facilities, or mechanical rooms. An integral relay can be used for alarm conditions and is configured with preset jumper selectable ranges of 25, 60, or 150 PPM. Field calibration can be done by using Model GCK-200CO-2000CO2 calibration gas, Model A-507 calibration adapter, and the on board zero and span potentiometers.

Applications:

• Garage or loading dock ventilation
• Vehicle maintenance facilities
• Mechanical room monitoring

Features:

• Field selectable current or voltage analog outputs
• Integral SPDT relay contact for low or high alarm
• Jumper selectable alarm set points of 25, 60, or 150 PPM
• UL recognized carbon monoxide sensing element
• Field calibration kits

The Series GSTA Carbon Monoxide/Nitrogen Dioxide Transmitters monitor the gas concentration in underground parking garages and loading docks. Carbon monoxide is commonly used to measure the exhaust of gasoline engines, while nitrogen dioxide is used for diesel engines. Field selectable current and voltage outputs allow the transmitter to be used with almost any building management controller. For carbon monoxide units, the user can select the output range to be from 0 to 50 ppm or up to 0 to 500 ppm. Nitrogen dioxide units come with a standard 0 to 10 ppm range. The output can be inverted to read 20 to 4 mA or 10 (5) to 0 VDC using internal dip switches.

To maximize the accuracy of the Series GSTA, the sensor can be field-calibrated using the A-449 remote LCD display. When the sensor reaches the end of its life, the display will indicate that the sensor needs to be replaced.

Features:

• Add optional integral LCD display by adding -LCD to end of model number (Example: GSTA-C-LCD)
• Industrial grade replaceable CO or NO2 sensors
• Field selectable current or voltage output on GSTA models
• Service display tool for set-up and calibration of models without a LCD

The Series RHP-E/N Wall Mount Humidity/Temperature/Dew Point Transmitter is the most versatile room transmitter on the market. The stylish housing is well vented to provide air flow across the sensor to improve measurement accuracy. The humidity and the dew point are measured using a capacitive polymer sensor that completely recovers from 100% saturation. The humidity and dew point can have either a current or voltage output, while the optional temperature output can be a current, voltage, RTD or thermistor. For models with current or voltage for the temperature output, the temperature range is field selectable.

Applications:

• Air economizers
• Room comfort monitoring
• Greenhouse monitoring

Features:

• Field selectable relative humidity or dew point output
• Universal analog outputs
• Integral or service tool LCD display options
• Two housing designs to match North American and European aesthetics

The Series AVPT Pencil Style Air Velocity Transmitter uses thermal anemometer technology to provide high accuracy and stable air velocity measurements in imperial and metric units. The Series AVPT can be configured with either a voltage output or BACnet MS/TP communication to provide universal inputs to a variety of monitoring equipment. Models are available with fixed cable lengths of 20 or 78 inches with flying leads or a 5-pin M12 connector on a 24 inch cable. Probes are available in lengths of 6 or 12 inches. A mounting flange included with the product provides the ability to vary insertion depth.

Models are available in 3% or 5% accuracy to suit a variety of applications, while the optional BACnet MS/TP communication protocol allows units to be daisy-chained to provide access to all of the velocity and temperature measurements.

Applications:

• VAV systems
• Building ducts

Features:

• Sensing elements have been coated with an engineered conformal coating to ensure durability and longevity
• Varying lengths for easy installation
• Functionality at temperatures below freezing

The Series RHPLC Wall Mount Humidity/Temperature Transmitter is a compact economical sensor for the building automation market space. The stylish housing is well vented to provide air flow across the sensor to improve measurement accuracy. Each unit utilizes a capacitive polymer sensing element to deliver a proportional analog output. A combination humidity and temperature model can be configured with current, voltage, RTD, or thermistor output. A wide selection of passive RTD or thermistor temperature sensors are available in this series.

Features:

• 2% or 3% accuracy models
• Humidity only or temperature and humidity combo
• Wide selection of passive thermistor or RTD temperature sensors

The Series 641 Air Velocity Transmitter is the ideal instrument for monitoring air flow. This transmitter uses a heated mass flow sensor which allows for precise velocity measurements at various flow rates and temperatures. The 641’s 16 field selectable ranges provides it the versatility to be selected for several air flow applications. The optional LED produces a complete, low-cost solution for local indication of air flow.

Applications:

• Exhaust stack flow monitoring
• Air control in drying processes
• HVAC air velocity measurements
• Fan supply and exhaust tracking
• Clean room fresh air supply
• Ensure proper lab hood exhaust flow rates

Features:

• Optional bright LED display
• Easy push button set-up
• Compact housing
• Digital filter for signal damping

The Series HHT Hazardous Area Humidity/Temperature Transmitter takes accurate measurements in the harshest of environments. The explosion-proof model is offered with 4 to 20 mA output for humidity only. The intrinsically safe version is offered with 4 to 20 mA output for humidity and temperature, and do require an intrinsically safe barrier to meet hazardous area approvals.

Applications:

• Process monitoring
• Offshore HVAC monitoring
• Dust and grain handling

Features:

• FM approved explosion-proof and intrinsically safe models
• Integral LCD option
• Dual temperature and relative humidity output models

The Series STRA Airflow Measurement Station is easy to install -- simply connect the tubing to the station fittings, then to a differential pressure manometer, gage, transmitter or switch. Single or multiple airflow elements are factory mounted and pre-piped in a casing designed for flanged connection to the duct work. The Series STRA utilizes an airflow averaging element in a head-type device, generating a differential (velocity) pressure signal similar to the orifice, venturi, and other head producing primary elements. It has been developed with a honeycomb airflow straightening section for use in duct systems having highly turbulent conditions at the point of measurement. Strategically located sensing ports continually sample the total and static pressures when inserted normal to flow. Total pressures sensed by the upstream ports are continually averaged within the airflow element in an isolated chamber. The static sensing ports are averaged in a second isolation chamber. Multiple elements are joined together for connection to a differential measurement device (gage, transmitter, etc.) for flow measurement and indication purposes.

Features:

• Low signal-to-noise ratio.
• Honeycomb airflow straightening section with 1/2" opening by 3" depth.
• Multiple total and static pressure sensing ports along the length of the element.
• Factory mounted and pre-piped in a flanged duct section (casing).
• ±2% accuracy throughout velocity ranges of 100 fpm and over.
• Standard construction includes galvanized casing and 6063-T5 anodized aluminum flow sensors.
• Standard airflow stations can be operated (in air) continuously in temperatures up to 350°F or intermittently in temperatures up to 400°F.
• All airflow stations can be operated in humidity ranges of 0 to 100%.
• Standard airflow stations have good salt air resistance and are suitable for most HVAC applications.
• Great for use where turbulent conditions exist.

The Series CDTV Carbon Dioxide/Volatile Organic Compound (VOC) Transmitter reduces energy cost in buildings by lowering the amount of conditioned air based on the occupancy of the space. By sensing both CO2 and VOC, the transmitter can detect fumes that may need to be exhausted during lower occupancy periods.

Applications:

• HVAC applications in hospitals, schools, and commercial buildings
• Waiting rooms or other spaces that may be occupied 24 hours a day
• Demand control ventilation
• Odor control

Features:

• Combination VOC and CO2 outputs reduce labor and material costs
• Single beam dual wavelength NDIR CO2 sensor allows for use in spaces that may be occupied 24 hours a day
• VOC output is correlated to be equivalent to CO2 measurements
• Ventilate using ASHRE’s occupancy-based VRP Algorithm

The Series MAFS Metal Averaging Flow Sensor is ideal for use with Dwyer Instruments, Inc. precision air velocity gages, transmitters and switches. The Series MAFS uses evenly distributed total and static pressure measuring points to deliver an accurate measurement of velocity pressure in a duct.

Applications:

• VAV air flow measurement
• Fume hood exhaust flow verification
• HVAC retrofit air flow measurement