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NO / NO2 Transmitters

6 Products
CO & NO2 Transmitters for Parking & Docks – Selectable Outputs & Calibration

Monitor gas levels in parking garages and docks with the Series GSTA CO & NO2 Transmitters. Features selectable outputs and calibration for accurate ventilation management.

CO/NO2 Gas Transmitter for Garages, BACnet/Modbus®, On-site Calibr.

The GSTC CO/NO2 Gas Transmitter monitors gas levels in garages and loading docks. Compatible with BACnet/Modbus, it features field calibration for accuracy and easy setup.

Nitrogen Dioxide Sensor, 0-6 PPM Default, (10 PPM Max), Duct Mount, 4-20mA, 2-10VDC Output

Nitrogen Dioxide Sensor for duct mounting, ideal for monitoring air quality in garages, kitchens, warehouses, and other indoor areas.

Nitrogen Dioxide Sensor, 0-6 PPM Default, (10 PPM Max), Wall Mount, 4-20mA, 2-10VDC Output

Wall-mount Nitrogen Dioxide Sensor detects air quality in spaces like garages, kitchens, and warehouses with reliable output signals for safety monitoring.

BACnet MSTP, Smart Sensor, 3 SPDT Relays, NEMA 4X

BACnet MSTP smart sensor with 3 relays and NEMA 4X rating, ideal for industrial and commercial spaces like warehouses, mechanical rooms, and refrigeration plants.

BACnet MSTP, Expl Proof, Smart Sensor, 0-250 ppm, 3 SPDT Relays, NEMA 4X

BACnet MSTP smart sensor with explosion-proof design, ideal for industrial and commercial spaces like warehouses, mechanical rooms, and oil and gas facilities.

NO / NO2 Transmitters

NO and NO2 transmitters monitor nitrogen oxide gases in spaces where vehicle exhaust, combustion processes, or industrial activity can affect indoor air quality. Products in this category span wall and duct sensors, smart gas sensors, CO/NO2 transmitters, relay-equipped devices, and transmitters with analog, BACnet, Modbus, or RTU communication options.

Applications include:

  • Parking garage and loading dock ventilation
  • Diesel engine exhaust monitoring
  • Mechanical room gas detection
  • Duct or wall-mounted gas sensing
  • Building automation and alarm integration

ACI and Dwyer Instruments products represented in this category support nitrogen dioxide and related gas monitoring where output type, enclosure, and calibration requirements vary by installation.

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