Air Quality and Gas Instruments by Dwyer Instruments

Air Quality and Gas Instruments by Dwyer Instruments

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Dwyer extensive range is functional and specified to many
industries. The range includes:


  • 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.
  • The SERIES GSTA & GSTC Carbon Monoxide/Nitrogen
    Dioxide Gas Transmitters
    monitor gas concentrations in mechanical
    rooms, underground parking garages and loading docks. The carbon monoxide
    transmitter is used to measure the exhaust of gasoline engines, while the
    nitrogen dioxide transmitter is used for diesel engines. The Series GSTA
    features field selectable current and voltage outputs while the Series GSTC
    features BACnet or Modbus communication protocol, allowing gas sensing
    solutions that can be used with almost any building management
  • 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 with 2%, 3% or 5% accuracies. Duct mounted transmitters
    are available with an optional two-line alpha numeric LCD display.
  • 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 detecting both
    CO2 and VOC, the transmitter can also detect fumes that may need to be
    exhausted during lower occupancy periods. Combining both measurements in one
    transmitter reduces both labour and material costs by only having to install
    one CDTVVOC unit, instead of separate CO2 and VOC transmitters.
  • The MODEL OSC-200 Omnidirectional Occupancy Sensor helps
    to automate building control systems. A spherical Fresnel lens provides a 360
    detection zone with the use of infrared technology. The MODEL OSW-100
    Wall Mount Occupancy Sensor
    is an infrared sensor designed to help
    automate building control systems. The Model OSW-100 has a wide 110 viewing
    angle to capture movement up to 49.2麓 (15 m) away.


  • Lighting control
  • Building energy conservation
  • HVAC applications in hospitals, schools, and commercial
  • Demand control ventilation
  • Odour control

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