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 SPC01I05 5% Humidity Transmitter c/w setpoint control, Microprocessor based 4-20mA outputs for both Room humidity and setpoint
Regular price $148.34 USDRegular priceSale price $148.34 USD -
Greystone SPC01I03S 3% 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 $175.09 USDRegular priceSale price $175.09 USD -
Greystone SPC01I03 3% Humidity Transmitter c/w setpoint control, Microprocessor based 4-20mA outputs for both Room humidity and setpoint
Regular price $169.91 USDRegular priceSale price $169.91 USD -
Greystone SPC01I02S 2% 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 $214.29 USDRegular priceSale price $214.29 USD -
Greystone SPC01I02 2% Humidity Transmitter c/w setpoint control, Microprocessor based 4-20mA outputs for both Room humidity and setpoint, .
Regular price $209.04 USDRegular priceSale price $209.04 USD -
Gentex C Series Model CR Single/Multiple Station Electrochemical Carbon Monoxide Alarm, Universal Mount, Temporal 4 Audible Signal, Form A/C Relay Contacts, 120 VAC/9V
Regular price $89.00 USDRegular priceSale price $89.00 USD -
Gentex C Series Model C Single/Multiple Station Electrochemical Carbon Monoxide Alarm, Universal Mount, Temporal 4 Audible Signal, 120 VAC/9V
Regular price $73.00 USDRegular priceSale price $73.00 USD -
Gentex SC Series Model SCRR Single/Multiple Station Smoke/Carbon Monoxide Alarm, Universal Mount, Temporal 3 and Temporal 4 Audible Signal, 2 Sets Form A/C Relay Contacts, 120 VAC/9V
Regular price $126.00 USDRegular priceSale price $126.00 USD -
Gentex SC Series Model SCR Single/Multiple Station Smoke/Carbon Monoxide Alarm, Universal Mount, Temporal 3 and Temporal 4 Audible Signal, Form A/C Relay Contacts, 120 VAC/9V
Regular price $116.00 USDRegular priceSale price $116.00 USD -
Gentex SC Series Model SC Single/Multiple Station Smoke/Carbon Monoxide Alarm, Universal Mount, Temporal 3 and Temporal 4 Audible Signal, 120 VAC/9V
Regular price $99.00 USDRegular priceSale price $99.00 USD -
Senva AQ2W-BC2AABDU TotalSense IAQ Indoor, BACnet/Modbus, CO2, 2%RH, Tmp Xmit, OLED display, user PB
Regular price $409.29 USDRegular priceSale price $409.29 USD -
Senva AQ2W-BC2AABD TotalSense IAQ Indoor, BACnet/Modbus, CO2, 2%RH, Tmp Xmit, OLED display
Regular price $404.13 USDRegular priceSale price $404.13 USD -
Senva AQ2W-BC2AAAD TotalSense IAQ Indoor, BACnet/Modbus, CO2, 2%RH, OLED display
Regular price $404.13 USDRegular priceSale price $404.13 USD -
Senva AQ2W-AC2AAFDCO TotalSense IAQ Indoor, analog, CO2, 2%RH, 10kT3 temp, OLED Display, 1K slider, therm OR PB
Regular price $404.14 USDRegular priceSale price $404.14 USD -
Senva AQ2W-AC2AAEDCO TotalSense IAQ Indoor, analog, CO2, 2%RH, 10kT2 temp, OLED Display, 1K slider, therm OR PB
Regular price $404.14 USDRegular priceSale price $404.14 USD -
Senva AQ2W-AC2AAFD TotalSense IAQ Indoor, analog, CO2, 2%RH, 10kT3 temp, OLED Display
Regular price $386.94 USDRegular priceSale price $386.94 USD -
Senva AQ2W-AC2AAED TotalSense IAQ Indoor, analog, CO2, 2%RH, 10kT2 temp, OLED Display
Regular price $386.93 USDRegular priceSale price $386.93 USD -
Senva AQ2W-AC2AABD TotalSense IAQ Indoor, analog, CO2, 2%RH, temp Xmit, OLED Display
Regular price $369.74 USDRegular priceSale price $369.74 USD -
Senva AQ2W-AC2AAAD TotalSense IAQ Indoor, analog, CO2, 2%RH, OLED Display
Regular price $369.74 USDRegular priceSale price $369.74 USD -
Senva AQ2W-BCAAAED TotalSense IAQ Indoor, BACnet/Modbus, CO2, 10kT2 temp, OLED display
Regular price $352.54 USDRegular priceSale price $352.54 USD -
Senva AQ2W-BCAAABDU TotalSense IAQ Indoor, BACnet/Modbus, CO2, Temp Xmit OLED display, user PB
Regular price $340.50 USDRegular priceSale price $340.50 USD -
Senva AQ2W-BCAAAADU TotalSense IAQ Indoor, BACnet/Modbus, CO2, OLED display, user PB
Regular price $340.50 USDRegular priceSale price $340.50 USD -
Senva AQ2W-BCAAABD TotalSense IAQ Indoor, BACnet/Modbus, CO2, Tmp Xmit, OLED display
Regular price $335.35 USDRegular priceSale price $335.35 USD -
Senva AQ2W-BCAAAAD TotalSense IAQ Indoor, BACnet/Modbus, CO2, OLED display
Regular price $335.35 USDRegular priceSale price $335.35 USD -
Senva AQ2W-ACAAAFDC TotalSense IAQ Indoor, analog, CO2, 10kT3 temp, OLED Display, 1K slider
Regular price $330.19 USDRegular priceSale price $330.19 USD -
Senva AQ2W-ACAAAEDC TotalSense IAQ Indoor, analog, CO2, 10kT2 temp, OLED Display, 1K slider
Regular price $330.19 USDRegular priceSale price $330.19 USD -
Senva AQ2W-ACAAAFD TotalSense IAQ Indoor, analog, CO2, 10kT3 temp, OLED Display
Regular price $318.15 USDRegular priceSale price $318.15 USD -
Senva AQ2W-ACAAAED TotalSense IAQ Indoor, analog, CO2, 10kT2 temp, OLED Display
Regular price $318.15 USDRegular priceSale price $318.15 USD -
Senva AQ2W-ACAAABD TotalSense IAQ Indoor, analog, CO2, temp Xmit, OLED Display
Regular price $300.95 USDRegular priceSale price $300.95 USD -
Senva AQ2W-ACAAAAD TotalSense IAQ Indoor, analog, CO2, OLED Display
Regular price $300.95 USDRegular priceSale price $300.95 USD -
Senva AQ2W-BA2AABD TotalSense IAQ Indoor, BACnet/Modbus, 2%RH, temp Xmit, OLED display
Regular price $249.36 USDRegular priceSale price $249.36 USD -
Senva AQ2W-AA2AAFDCO TotalSense IAQ Indoor, analog, 2% RH, 10kT3 temp, OLED display, 1K slider, therm OR PB
Regular price $249.36 USDRegular priceSale price $249.36 USD -
Senva AQ2W-AA2AAEDCO TotalSense IAQ Indoor, analog, 2% RH, 10kT2 temp, OLED display, 1K slider, therm OR PB
Regular price $249.36 USDRegular priceSale price $249.36 USD -
Senva AQ2W-AA2AAEDC TotalSense IAQ Indoor, analog, 2% RH, 10kT2 temp, OLED display, 1K slider
Regular price $244.20 USDRegular priceSale price $244.20 USD -
Senva AQ2W-AA2AAKD TotalSense IAQ Indoor, analog, 2% RH, 20k temp, OLED display
Regular price $232.16 USDRegular priceSale price $232.16 USD -
Senva AQ2W-AA2AAFD TotalSense IAQ Indoor, analog, 2% RH, 10kT3 temp, OLED display
Regular price $232.16 USDRegular priceSale price $232.16 USD -
Senva AQ2W-AA2AAED TotalSense IAQ Indoor, analog, 2% RH, 10kT2 temp, OLED display
Regular price $232.16 USDRegular priceSale price $232.16 USD -
Senva AQ2W-AA2AABD TotalSense IAQ Indoor, analog, 2% RH, Tmp Xmit, OLED display
Regular price $214.97 USDRegular priceSale price $214.97 USD -
Senva AQ2W-AA2AAAD TotalSense IAQ Indoor, analog, 2% RH, OLED display
Regular price $214.96 USDRegular priceSale price $214.96 USD -
Senva AQ2W-BAAAABDU TotalSense IAQ Indoor, BACnet/Modbus, temp Xmit OLED display, user PB
Regular price $185.73 USDRegular priceSale price $185.73 USD -
Senva CT1W-E3X Combination IAQ Sensor, CO2, Wall, noLCD, 10K Type 2
Regular price $172.91 USDRegular priceSale price $172.91 USD -
Senva CT1W-E3D Combination IAQ Sensor, CO2, Wall, LCD, 10K Type 2
Regular price $253.26 USDRegular priceSale price $253.26 USD -
Senva CT1W-B3X Combination IAQ Sensor, CO2, Wall, noLCD, TempTransmitter
Regular price $172.91 USDRegular priceSale price $172.91 USD -
Senva CT1W-B3D Combination IAQ Sensor, CO2, Room, Surface Mount LCD, TempTransmitter
Regular price $253.26 USDRegular priceSale price $253.26 USD -
Senva CT1W-A3X-D Combination IAQ Sensor, Dual Channel CO2, Room, Wall, noLCD, noTEMP
Regular price $184.14 USDRegular priceSale price $184.14 USD -
Senva CT1W-A3X Combination IAQ Sensor, CO2, Room, Surface Mount noLCD, noTEMP
Regular price $157.20 USDRegular priceSale price $157.20 USD -
Senva CT1W-A3D-D Combination IAQ Sensor, Dual Channel CO2, Room, Wall, LCD, noTEMP
Regular price $277.91 USDRegular priceSale price $277.91 USD -
Senva CT1W-A3D Combination IAQ Sensor, CO2, Room, Surface Mount LCD, noTEMP
Regular price $235.79 USDRegular priceSale price $235.79 USD -
Senva CT1R-K3X Combination IAQ Sensor, CO2, Room, noLCD, 20K
Regular price $172.91 USDRegular priceSale price $172.91 USD -
Senva CT1R-K3D Combination IAQ Sensor, CO2, Room, LCD, 20K
Regular price $253.26 USDRegular priceSale price $253.26 USD