Collection: Indoor Air Quality (IAQ) and Combo Sensors
Indoor Air Quality (IAQ) affects health and productivity, with pollutants like mold and VOCs causing issues, while good ventilation improves well-being, and sensors help manage these conditions by signaling systems to adjust for cleaner air, reducing headaches and fatigue. Combo Sensors measure room levels of varying conditions. Many models include temperature and relative humidity, while others incorporate these with air quality sensors for gases (CO2, CO, NO2) and/or particulate matter.
-
Siemens QFM2100 - Duct Humidity Sensor, 0-10V, 5% Accuracy
Regular price $168.55 USDRegular priceSale price $168.55 USD -
Siemens QFM2101 - Duct Humidity Sensor, 4-20mA, 5% Accuracy
Regular price $168.55 USDRegular priceSale price $168.55 USD -
Siemens QFM2160U - Duct Humidity & Temperature Sensor, 0-10V, 5% Accuracy
Regular price $194.03 USDRegular priceSale price $194.03 USD -
Siemens QFM3100 - Duct Humidity Sensor, 0-10V, 2% Accuracy
Regular price $240.61 USDRegular priceSale price $240.61 USD -
Siemens QFM3101 - Duct Humidity Sensor, 4-20mA, 2% Accuracy
Regular price $240.61 USDRegular priceSale price $240.61 USD -
Siemens QFM3160 - Duct Humidity & Temperature Sensor, 0-10V, 2% Accuracy
Regular price $265.50 USDRegular priceSale price $265.50 USD -
Siemens QFM3171 - Duct Humidity & Temperature Sensor,4-20mA, 2% Accuracy
Regular price $265.50 USDRegular priceSale price $265.50 USD -
Siemens QFM3171D - Duct Humidity & Temperature Sensor, 4-20mA, 2% Accuracy, with Display
Regular price $336.54 USDRegular priceSale price $336.54 USD -
Siemens QFM4160 - Duct Humidity & Temperature Sensor, 0-10V, 2% Accuracy, Certified
Regular price $638.37 USDRegular priceSale price $638.37 USD -
Siemens QFA3160 - Wall Mount Humidity & Temperature Sensor, 0-10V, 2% Accuracy
Regular price $294.91 USDRegular priceSale price $294.91 USD -
Siemens QFA3160D - Wall Mount Humidity & Temperature Sensor, 0-10V, 2% Accuracy, with Display
Regular price $363.79 USDRegular priceSale price $363.79 USD -
Siemens QFA3171 - Wall Mount Humidity & Temperature Sensor,4-20mA, 2% Accuracy
Regular price $294.91 USDRegular priceSale price $294.91 USD -
Siemens QFA3171D - Wall Mount Humidity & Temperature Sensor, 4-20mA, 2% Accuracy, with Display
Regular price $363.79 USDRegular priceSale price $363.79 USD -
Siemens QFA4160 - Wall Mount Humidity & Temperature Sensor, 0-10V, 2% Accuracy, Certified
Regular price $638.37 USDRegular priceSale price $638.37 USD -
Siemens QFA32SS.FWSN Humidity and Temperature Room Unit, 2%, 0-10V / 0-5V / 4-20 mA selectable Temp&RH, with Display, Temp Setpoint, Override, White, Siemens Logo, No Comm Port.
Regular price $269.99 USDRegular priceSale price $269.99 USD -
Siemens QFA32SS.FWNN Room Humidity and Temperature Sensor, 0-10V / 0-5V / 4-20 mA (selectable), Full Feature, No Logo.
Regular price $269.88 USDRegular priceSale price $269.88 USD -
Siemens QFA32SS.EWSN Humidity and Temperature Room Unit, 2%, 0-10V / 0-5V / 4-20 mA selectable RH and Tempemp, White, Siemens Logo, No Comm Port.
Regular price $195.81 USDRegular priceSale price $195.81 USD -
Siemens QFA32SS.EWNN Room Humidity and Temperature Sensor, 0-10V / 0-5V / 4-20 mA (selectable), No HMI, No Logo.
Regular price $195.78 USDRegular priceSale price $195.78 USD -
Siemens QFA3280.FWSC Room Temp Sensor, RH 2%, for TEC, Digital signal, Sense & with Display, Override, Temp Setpoint, Tool Port.
Regular price $270.48 USDRegular priceSale price $270.48 USD -
Siemens QFA3280.FWNC Room Temp Sensor, RH 2%, for TEC, Digital signal, Sense & with Display, Override, Temp Setpoint, No Logo, Tool Port.
Regular price $326.66 USDRegular priceSale price $326.66 USD -
Siemens QFA3280.EWSC Room Temp Sensor, RH 2%, for TEC, Digital signal, Temp Sensing, Tool Port.
Regular price $154.56 USDRegular priceSale price $154.56 USD -
Siemens QFA3280.EWNC Room Temp Sensor, RH 2%, for TEC, Digital signal, Temp Sensing, No Logo, Tool Port.
Regular price $154.56 USDRegular priceSale price $154.56 USD -
Siemens QFA3280.DWSC Room Temp Sensor, RH 2%, for TEC, Digital signal, Sense & with Display, Tool Port.
Regular price $261.34 USDRegular priceSale price $261.34 USD -
Siemens QFA3230.FWNN Room Humidity (0-10V) and Temperature Sensor (10k Ohm Type 2 Thermistor), Full Featuire, No Logo.
Regular price $235.99 USDRegular priceSale price $235.99 USD -
Siemens QFA3212.FWSN Room Humidity (0-10V) and Temperature Sensor (Platinum 1K Ohm 385 Alpha), Full Feature, Siemens Logo.
Regular price $248.07 USDRegular priceSale price $248.07 USD -
Siemens QFA3212.FWNN Room RH and Temperature Sensor 1K OHM PT(385) Full HMI, No Logo.
Regular price $248.41 USDRegular priceSale price $248.41 USD -
Siemens QFA3212.EWSN Room Humidity (0-10V) and Temperature Sensor (Platinum 1K Ohm 385 Alpha), No HMI, Siemens Logo.
Regular price $209.45 USDRegular priceSale price $209.45 USD -
Siemens QFA3212.EWNN Room RH and Temperature Sensor, 1K OHM PT(385) Blank, No Logo.
Regular price $209.28 USDRegular priceSale price $209.28 USD -
Siemens QPA2062D Room Sensor CO2, Temperature, Relative Humidity with Display, 0-10V
Regular price $665.33 USDRegular priceSale price $665.33 USD -
Siemens QPA2062 Room Sensor CO2, Temperature, Relative Humidity, 0 to 10V
Regular price $613.21 USDRegular priceSale price $613.21 USD -
Siemens QPA2060D Room Sensor CO2 and Temperature with Display, 0 to 10V
Regular price $503.69 USDRegular priceSale price $503.69 USD -
Siemens QPA2060 Room Sensor CO2 and Temperature, 0 to 10V
Regular price $455.70 USDRegular priceSale price $455.70 USD -
Siemens QPA2002D Room sensor CO2 and VOC with Display, 0 to 10V
Regular price $535.10 USDRegular priceSale price $535.10 USD -
Siemens QPA2002 Room Sensor CO2 and VOC, 0 to 10V
Regular price $465.46 USDRegular priceSale price $465.46 USD -
Siemens QPA2000 Room Sensor CO2, 0 to 10V, Room Sensor CO2, 0 to 10V
Regular price $344.95 USDRegular priceSale price $344.95 USD -
Siemens QPM2162 IAQ Duct Sensor CO2, Temperature, Relative Humidity, 0 to 10V
Regular price $682.20 USDRegular priceSale price $682.20 USD -
Siemens QPM2160D IAQ Duct CO2, Temperature Sensor, 0-10V, Display
Regular price $671.26 USDRegular priceSale price $671.26 USD -
Siemens QPM2160 IAQ Duct Sensor CO2 and Temperature, 0 to 10V
Regular price $599.15 USDRegular priceSale price $599.15 USD -
Siemens QPM2102D IAQ Duct Sensor CO2 and VOC with Display, 0 to 10V
Regular price $621.43 USDRegular priceSale price $621.43 USD -
Siemens QPM2102 IAQ Duct Sensor CO2 and VOC, 0 to 10V
Regular price $528.43 USDRegular priceSale price $528.43 USD -
Siemens QPM2100 IAQ Duct Sensor CO2, 0 to 10V
Regular price $463.00 USDRegular priceSale price $463.00 USD -
Siemens QFA3280.FWSC, Siemens QFA3280.FWSC Room Temp Sensor, RH 2%, for TEC, Digital signal, Sense & with Display, Override, Temp Setpoint, Tool Port.
Regular price $270.48 USDRegular priceSale price $270.48 USD -
Siemens QFA3280.FWNC, Siemens QFA3280.FWNC Room Temp Sensor, RH 2%, for TEC, Digital signal, Sense & with Display, Override, Temp Setpoint, No Logo, Tool Port.
Regular price $326.66 USDRegular priceSale price $326.66 USD -
Siemens QFA3280.EWSC, Siemens QFA3280.EWSC Room Temp Sensor, RH 2%, for TEC, Digital signal, Temp Sensing, Tool Port.
Regular price $154.56 USDRegular priceSale price $154.56 USD -
Siemens QFA3280.EWNC, Siemens QFA3280.EWNC Room Temp Sensor, RH 2%, for TEC, Digital signal, Temp Sensing, No Logo, Tool Port.
Regular price $154.56 USDRegular priceSale price $154.56 USD -
Siemens QFA3280.DWSC, Siemens QFA3280.DWSC Room Temp Sensor, RH 2%, for TEC, Digital signal, Sense & with Display, Tool Port.
Regular price $261.34 USDRegular priceSale price $261.34 USD -
Siemens QPA2284.FWSC, Siemens QPA2284.FWSC Room CO2, Humidity and Temperature Sensor, Full Feature, Siemens Logo, Tool Port, For Siemens TEC Controllers
Regular price $662.30 USDRegular priceSale price $662.30 USD -
Siemens QPA2284.FWNC, Siemens QPA2284.FWNC Room CO2, Humidity and Temperature Sensor, Full Feature, No Logo, Tool Port, For Siemens TEC Controllers
Regular price $662.30 USDRegular priceSale price $662.30 USD -
Siemens QPA2282.EWSC, Siemens QPA2282.EWSC Room CO2, Temperature Sensor, No HMI, Siemens Logo, Tool Port, For Siemens TEC Controllers
Regular price $454.16 USDRegular priceSale price $454.16 USD -
Greystone NTRCNTS (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Concealed, Temperature Only, Momentary Override Switch - N.O.
Regular price $135.50 USDRegular priceSale price $135.50 USD