Sensors That Make Buildings Smart!
Reference on AirTest: Understanding The Parking Garage Opportunity
CO2 Reference Library
Carbon Monoxide Characteristics
Background on Carbon Monoxide Sensing Technologies for Parking Garages
Using CO2 to Control Odors in Parking Facilities
CO Characteristics

Contact Us
Call us to order or for applications assistance.
Monday to Friday
8:00 AM to 5:00 PM, PST
Ways to Pay
We accept orders through our website or by phone.

Next Day Delivery
Orders must be received by 1:00 pm PST during business hours.

Mailing List
You can subscribe or unsubscribe to our Mailing List at any time.






Model TR3210-NO2
NO2 (Diesel)


  • Use with digital building control systems / VFD control / LonWorks®
  • Control of diesel fumes in: indoor parking, bus garages, service garages, arenas, fire stations, loading docks, warehouses
  • BACnet® version available soon


Key Features

  • High accuracy electrochemical sensor in rugged enclosure
  • NO2 specific (negligible interference from humidity and other gases)
  • Loop powered, linear output
  • 18 month operating life
  • Plug-in replaceable sensor element available
  • CSA certified
  • Now also available with LonWorks® communication capability.


NO2 - Nitrogen Dioxide Transmitters


Model TR3210-NO2 (Nitrogen Dioxide)

  • Temp Range: -40 to 140°F (-40 to 60°C)
  • Output: 4-20 mA (loop powered)
  • Power: 12-30 VDC
  • Measures: 0-10 ppm
  • Calibration: 1 year recommended

TR3210 Calibration Kit


Model TR3210-NO2-Lon

  • Same performance as TR3210-NO2 above.
  • LonWorks® Network Variabies: nviRequest, nciMaxStsSendT, nvoStatus
  • LonWorks® Sensor Variables: nvoSensorValue (% of range), nvoSensorInv, nciMiniDelta, nciSnsrSmplRate

TR3210 Calibration Kit
LON XIF and XFB Files
Published: February 16, 2004 Last Updated: April 26, 2013