Collection: Indoor Air Quality (IAQ) and Combo Sensors
Indoor Air Quality (IAQ) directly impacts occupant health and productivity in commercial buildings. Poor ventilation and pollutants such as mold, VOCs, CO₂, and particulate matter can cause headaches, fatigue, and reduced performance — while well-managed air quality improves comfort and well-being. IAQ and combo sensors monitor these conditions and signal HVAC systems to automatically adjust for cleaner air. Combo sensors measure multiple parameters in a single device, with many models combining temperature and relative humidity, and others adding CO₂, CO, NO₂, or particulate matter monitoring. We carry IAQ and combo sensors from Senva, Gentex, Siemens, Greystone, and other trusted manufacturers.
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Greystone RH110B03C1A1 3% designer humidity & temp transmitter, 24 Vdc supply, 4-20mA output and 0-35C(32-95F) temperature range.
Regular price $235.23 USDRegular priceSale price $235.23 USD -
Greystone RH110B02C1A2 2% designer humidity & temp transmitter, 24 Vdc supply, 4-20mA output and 0-50C(32-122F) temperature range.
Regular price $261.30 USDRegular priceSale price $261.30 USD -
Greystone RH110B02C1A1 2% designer humidity & temp transmitter, 24 Vdc supply, 4-20mA output and 0-35C(32-95F) temperature range.
Regular price $261.30 USDRegular priceSale price $261.30 USD -
Greystone SPC06V05S 5% Humidity/temp transmitter c/w setpoint control, Microprocessor based 0-10Vdc outputs for both Room humidity / temp and humidity / temp setpoint control c/w momentary push button (override)
Regular price $214.29 USDRegular priceSale price $214.29 USD -
Greystone SPC06V05 5% Humidity/temp transmitter c/w setpoint control, Microprocessor based 0-10Vdc outputs for both Room humidity / temp and humidity / temp setpoint control
Regular price $209.04 USDRegular priceSale price $209.04 USD -
Greystone SPC06V03S 3% Humidity/temp transmitter c/w setpoint control, Microprocessor based 0-10Vdc outputs for both Room humidity / temp and humidity / temp setpoint control c/w momentary push button (override)
Regular price $240.43 USDRegular priceSale price $240.43 USD -
Greystone SPC06V03 3% Humidity/temp transmitter c/w setpoint control, Microprocessor based 0-10Vdc outputs for both Room humidity / temp and humidity / temp setpoint control
Regular price $235.23 USDRegular priceSale price $235.23 USD -
Greystone SPC06V02S 2% Humidity/temp transmitter c/w setpoint control, Microprocessor based 0-10Vdc outputs for both Room humidity / temp and humidity / temp setpoint control c/w momentary push button (override)
Regular price $279.65 USDRegular priceSale price $279.65 USD -
Greystone SPC06V02 2% Humidity/temp transmitter c/w setpoint control, Microprocessor based 0-10Vdc outputs for both Room humidity / temp and humidity / temp setpoint control
Regular price $274.35 USDRegular priceSale price $274.35 USD -
Greystone SPC06I05S 5% Humidity/temp transmitter c/w setpoint control, Microprocessor based 4-20mA outputs for both Room humidity / temp and humidity / temp setpoint control c/w momentary push button (override)
Regular price $214.29 USDRegular priceSale price $214.29 USD -
Greystone SPC06I05 5% Humidity/temp transmitter c/w setpoint control, Microprocessor based 4-20mA outputs for both Room humidity / temp and humidity / temp setpoint control
Regular price $209.04 USDRegular priceSale price $209.04 USD -
Greystone SPC06I03S 3% Humidity/temp transmitter c/w setpoint control, Microprocessor based 4-20mA outputs for both Room humidity / temp and humidity / temp setpoint control c/w momentary push button (override)
Regular price $240.43 USDRegular priceSale price $240.43 USD -
Greystone SPC06I03 3% Humidity/temp transmitter c/w setpoint control, Microprocessor based 4-20mA outputs for both Room humidity / temp and humidity / temp setpoint control
Regular price $235.23 USDRegular priceSale price $235.23 USD -
Greystone SPC06I02S 2% Humidity/temp transmitter c/w setpoint control, Microprocessor based 4-20mA outputs for both Room humidity / temp and humidity / temp setpoint control c/w momentary push button (override)
Regular price $279.65 USDRegular priceSale price $279.65 USD -
Greystone SPC06I02 2% Humidity/temp transmitter c/w setpoint control, Microprocessor based 4-20mA outputs for both Room humidity / temp and humidity / temp setpoint control
Regular price $274.35 USDRegular priceSale price $274.35 USD -
Greystone SPC05V05S 5% Humidity/temp transmitter c/w setpoint control, Microprocessor based 0-10Vdc outputs for both Room humidity / temp and humidity setpoint control c/w momentary push button (override)
Regular price $201.23 USDRegular priceSale price $201.23 USD -
Greystone SPC05V05 5% Humidity/temp transmitter c/w setpoint control, Microprocessor based 0-10Vdc outputs for both Room humidity / temp and humidity setpoint control
Regular price $195.99 USDRegular priceSale price $195.99 USD -
Greystone SPC05V03S 3% Humidity/temp transmitter c/w setpoint control, Microprocessor based 0-10Vdc outputs for both Room humidity / temp and humidity setpoint control c/w momentary push button (override)
Regular price $227.34 USDRegular priceSale price $227.34 USD -
Greystone SPC05V03 3% Humidity/temp transmitter c/w setpoint control, Microprocessor based 0-10Vdc outputs for both Room humidity / temp and humidity setpoint control
Regular price $222.17 USDRegular priceSale price $222.17 USD -
Greystone SPC05V02S 2% Humidity/temp transmitter c/w setpoint control, Microprocessor based 0-10Vdc outputs for both Room humidity / temp and humidity setpoint control c/w momentary push button (override)
Regular price $266.51 USDRegular priceSale price $266.51 USD -
Greystone SPC05V02 2% Humidity/temp transmitter c/w setpoint control, Microprocessor based 0-10Vdc outputs for both Room humidity / temp and humidity setpoint control
Regular price $261.30 USDRegular priceSale price $261.30 USD -
Greystone SPC05I05S 5% Humidity/temp transmitter c/w setpoint control, Microprocessor based 4-20mA outputs for both Room humidity / temp and humidity setpoint control c/w momentary push button (override)
Regular price $201.23 USDRegular priceSale price $201.23 USD -
Greystone SPC05I05 5% Humidity/temp transmitter c/w setpoint control, Microprocessor based 4-20mA outputs for both Room humidity / temp and humidity setpoint control
Regular price $195.99 USDRegular priceSale price $195.99 USD -
Greystone SPC05I03S 3% Humidity/temp transmitter c/w setpoint control, Microprocessor based 4-20mA outputs for both Room humidity / temp and humidity setpoint control c/w momentary push button (override)
Regular price $227.34 USDRegular priceSale price $227.34 USD -
Greystone SPC05I03 3% Humidity/temp transmitter c/w setpoint control, Microprocessor based 4-20mA outputs for both Room humidity / temp and humidity setpoint control
Regular price $222.17 USDRegular priceSale price $222.17 USD -
Greystone SPC05I02S 2% Humidity/temp transmitter c/w setpoint control, Microprocessor based 4-20mA outputs for both Room humidity / temp and humidity setpoint control c/w momentary push button (override)
Regular price $266.51 USDRegular priceSale price $266.51 USD -
Greystone SPC05I02 2% Humidity/temp transmitter c/w setpoint control, Microprocessor based 4-20mA outputs for both Room humidity / temp and humidity setpoint control
Regular price $261.30 USDRegular priceSale price $261.30 USD -
Greystone SPC04V05S 5% Humidity/temp transmitter c/w setpoint control, Microprocessor based 0-10Vdc outputs for both Room humidity / temp and temp setpoint control c/w momentary push button (override)
Regular price $201.23 USDRegular priceSale price $201.23 USD -
Greystone SPC04V05 5% Humidity/temp transmitter c/w setpoint control, Microprocessor based 0-10Vdc outputs for both Room humidity / temp and temp setpoint control
Regular price $195.99 USDRegular priceSale price $195.99 USD -
Greystone SPC04V03S 3% Humidity/temp transmitter c/w setpoint control, Microprocessor based 0-10Vdc outputs for both Room humidity / temp and temp setpoint control c/w momentary push button (override)
Regular price $227.34 USDRegular priceSale price $227.34 USD -
Greystone SPC04V03 3% Humidity/temp transmitter c/w setpoint control, Microprocessor based 0-10Vdc outputs for both Room humidity / temp and temp setpoint control
Regular price $222.17 USDRegular priceSale price $222.17 USD -
Greystone SPC04V02S 2% Humidity/temp transmitter c/w setpoint control, Microprocessor based 0-10Vdc outputs for both Room humidity / temp and temp setpoint control c/w momentary push button (override)
Regular price $266.51 USDRegular priceSale price $266.51 USD -
Greystone SPC04V02 2% Humidity/temp transmitter c/w setpoint control, Microprocessor based 0-10Vdc outputs for both Room humidity / temp and temp setpoint control
Regular price $261.30 USDRegular priceSale price $261.30 USD -
Greystone SPC04I05S 5% Humidity/temp transmitter c/w setpoint control, Microprocessor based 4-20mA outputs for both Room humidity / temp and temp setpoint control c/w momentary push button (override)
Regular price $201.23 USDRegular priceSale price $201.23 USD -
Greystone SPC04I05 5% Humidity/temp transmitter c/w setpoint control, Microprocessor based 4-20mA outputs for both Room humidity / temp and temp setpoint control
Regular price $195.99 USDRegular priceSale price $195.99 USD -
Greystone SPC04I03S 3% Humidity/temp transmitter c/w setpoint control, Microprocessor based 4-20mA outputs for both Room humidity / temp and temp setpoint control c/w momentary push button (override)
Regular price $227.34 USDRegular priceSale price $227.34 USD -
Greystone SPC04I03 3% Humidity/temp transmitter c/w setpoint control, Microprocessor based 4-20mA outputs for both Room humidity / temp and temp setpoint control
Regular price $222.17 USDRegular priceSale price $222.17 USD -
Greystone SPC04I02S 2% Humidity/temp transmitter c/w setpoint control, Microprocessor based 4-20mA outputs for both Room humidity / temp and temp setpoint control c/w momentary push button (override)
Regular price $266.51 USDRegular priceSale price $266.51 USD -
Greystone SPC04I02 2% Humidity/temp transmitter c/w setpoint control, Microprocessor based 4-20mA outputs for both Room humidity / temp and temp setpoint control
Regular price $261.30 USDRegular priceSale price $261.30 USD -
Greystone SPC02VS temp Transmitter. c/w setpoint control, Microprocessor based 0-10Vdc outputs for both Room temp and setpoint c/w momentary push button (override)
Regular price $121.58 USDRegular priceSale price $121.58 USD -
Greystone SPC02V temp Transmitter. c/w setpoint control, Microprocessor based 0-10Vdc outputs for both Room temp and setpoint
Regular price $120.91 USDRegular priceSale price $120.91 USD -
Greystone SPC02IS temp Transmitter. c/w setpoint control, Microprocessor based 4-20mA outputs for both Room temp and setpoint c/w momentary push button (override)
Regular price $121.58 USDRegular priceSale price $121.58 USD -
Greystone SPC02I temp Transmitter. c/w setpoint control, Microprocessor based 4-20mA outputs for both Room temp and setpoint
Regular price $120.91 USDRegular priceSale price $120.91 USD -
Greystone SPC01V05S 5% Humidity Transmitter c/w setpoint control, Microprocessor based 0-10Vdc outputs for both Room humidity and setpoint c/w momentary push button (override)
Regular price $153.77 USDRegular priceSale price $153.77 USD -
Greystone SPC01V05 5% Humidity Transmitter c/w setpoint control, Microprocessor based 0-10Vdc outputs for both Room humidity and setpoint
Regular price $148.34 USDRegular priceSale price $148.34 USD -
Greystone SPC01V03S 3% Humidity Transmitter c/w setpoint control, Microprocessor based 0-10Vdc outputs for both Room humidity and setpoint c/w momentary push button (override)
Regular price $175.09 USDRegular priceSale price $175.09 USD -
Greystone SPC01V03 3% Humidity Transmitter c/w setpoint control, Microprocessor based 0-10Vdc outputs for both Room humidity and setpoint
Regular price $169.91 USDRegular priceSale price $169.91 USD -
Greystone SPC01V02S 2% Humidity Transmitter c/w setpoint control, Microprocessor based 0-10Vdc outputs for both Room humidity and setpoint c/w momentary push button (override)
Regular price $214.29 USDRegular priceSale price $214.29 USD -
Greystone SPC01V02 2% Humidity Transmitter c/w setpoint control, Microprocessor based 0-10Vdc outputs for both Room humidity and setpoint
Regular price $209.04 USDRegular priceSale price $209.04 USD -
Greystone SPC01I05S 5% Humidity Transmitter c/w setpoint control, Microprocessor based 4-20mA outputs for both Room humidity and setpoint c/w momentary push button (override)
Regular price $153.77 USDRegular priceSale price $153.77 USD