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Almost every heating, ventilation, air-conditioning, and refrigeration system uses sensors. Choose the world's top sensor brands to optimize system performance, and ensure occupant health, safety, comfort, and productivity.

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HVAC Humidity Sensor for Sale Duct Sensors Outside Sensors for Sale Room Humidity and Temperature Sensors CO2 Sensors for Sale Belimo Strap Sensors Pressure Sensors Belimo Bullet Sensors Accessories
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View Details Siemens Building Technology 540-520B Room Temperature Sensor, Flush Mount, 10 K ohm, 55-95 Deg F, White | Midwest Supply Us
540-520B | Room Temperature Sensor, Flush Mount, 10 K ohm, 55-95 Deg F, White | Siemens Building Technology
Brand: Siemens Building Technology
SKU: 540-520B
$91.69 each
View Details Siemens Building Technology QAA2280.FWNC Room Temp Sensor, Full Feature, No Logo, Tool Port, Siemens TEC Controllers | Midwest Supply Us
QAA2280.FWNC | Room Temp Sensor, Full Feature, No Logo, Tool Port, Siemens TEC Controllers | Siemens Building Technology
Brand: Siemens Building Technology
SKU: QAA2280.FWNC
$181.86 each
View Details Siemens Building Technology 7MF15654CA005EA1 SENSOR, LIQUID/GAS, 4-20MA, 0-150 PSIG | Midwest Supply Us
7MF15654CA005EA1 | SENSOR, LIQUID/GAS, 4-20MA, 0-150 PSIG | Siemens Building Technology
Brand: Siemens Building Technology
SKU: 7MF15654CA005EA1
$313.47 each
View Details Siemens Building Technology 540-660A Room Temperature Sensor, Beige | Midwest Supply Us
540-660A | Room Temperature Sensor, Beige | Siemens Building Technology
Brand: Siemens Building Technology
SKU: 540-660A
$260.03 each
View Details Siemens Building Technology 590-505 590 Series Differential Pressure Sensor, +/- 0.25" Water Column | Midwest Supply Us
590-505 | 590 Series Differential Pressure Sensor, +/- 0.25" Water Column | Siemens Building Technology
Brand: Siemens Building Technology
SKU: 590-505
View Details
View Details Siemens Building Technology QFA3100 Outside Air Relative Humidity Sensor, 2 percent accuracy, 0-10 Vdc | Midwest Supply Us
QFA3100 | Outside Air Relative Humidity Sensor, 2 percent accuracy, 0-10 Vdc | Siemens Building Technology
Brand: Siemens Building Technology
SKU: QFA3100
$243.96 each
View Details Siemens Building Technology QFM2171 Duct RH and Temp Sensor, 5 percent accuracy, RH: 4-20 4 to 20 Ma T: 4-20 mA | Midwest Supply Us
QFM2171 | Duct RH and Temp Sensor, 5 percent accuracy, RH: 4-20 4 to 20 Ma T: 4-20 mA | Siemens Building Technology
Brand: Siemens Building Technology
SKU: QFM2171
$195.58 each
View Details Siemens Building Technology QFR9530.KIT QFR9530 with AQM5H Harness Duct Surface Mount RH&T Sensor and wiring harness | Midwest Supply Us
QFR9530.KIT | QFR9530 with AQM5H Harness Duct Surface Mount RH&T Sensor and wiring harness | Siemens Building Technology
Brand: Siemens Building Technology
SKU: QFR9530.KIT
$80.92 each
View Details Siemens Building Technology QFM2120 Duct RH and Temp Sensor, 5 percent, RH: 0-10 Vdc, T: 1K ohm Nickel | Midwest Supply Us
QFM2120 | Duct RH and Temp Sensor, 5 percent, RH: 0-10 Vdc, T: 1K ohm Nickel | Siemens Building Technology
Brand: Siemens Building Technology
SKU: QFM2120
$195.58 each
View Details Siemens Building Technology QFM2160U Duct RH and Temp Sensor, 5 percent accuracy, RH: 0-10 Vdc, T: 0-10 Vdc | Midwest Supply Us
QFM2160U | Duct RH and Temp Sensor, 5 percent accuracy, RH: 0-10 Vdc, T: 0-10 Vdc | Siemens Building Technology
Brand: Siemens Building Technology
SKU: QFM2160U
$195.58 each
View Details Siemens Building Technology QFA3280.FWNC Room Temp Sensor, RH 2%, TEC, Dig signal, Sense & Display, Override, Temp Setpt | Midwest Supply Us
QFA3280.FWNC | Room Temp Sensor, RH 2%, TEC, Dig signal, Sense & Display, Override, Temp Setpt | Siemens Building Technology
Brand: Siemens Building Technology
SKU: QFA3280.FWNC
$259.80 each
View Details Siemens Building Technology QFA3230.FWNN Room Humidity + Temperature Sensor, Full Featuire, No Logo | Midwest Supply Us
QFA3230.FWNN | Room Humidity + Temperature Sensor, Full Featuire, No Logo | Siemens Building Technology
Brand: Siemens Building Technology
SKU: QFA3230.FWNN
$226.67 each
View Details Siemens Building Technology QFA3171D Outside Air RH & T Sensor, 2 percent, RH: 4-20 mA T: 4-20 mA, Display | Midwest Supply Us
QFA3171D | Outside Air RH & T Sensor, 2 percent, RH: 4-20 mA T: 4-20 mA, Display | Siemens Building Technology
Brand: Siemens Building Technology
SKU: QFA3171D
$366.71 each
View Details Siemens Building Technology QFA3160 Outside Air RH and Temp Sensor, 2 percent, RH: 0-10 Vdc, T: 0-10 Vdc | Midwest Supply Us
QFA3160 | Outside Air RH and Temp Sensor, 2 percent, RH: 0-10 Vdc, T: 0-10 Vdc | Siemens Building Technology
Brand: Siemens Building Technology
SKU: QFA3160
$297.28 each
View Details Siemens Building Technology QAP1030.200 Cable Temperature Sensor, NTC 10K Ohm, Type II | Midwest Supply Us
QAP1030.200 | Cable Temperature Sensor, NTC 10K Ohm, Type II | Siemens Building Technology
Brand: Siemens Building Technology
SKU: QAP1030.200
$25.36 each
View Details Siemens Building Technology QAM2030.045 Duct Point Temperature Sensor, 10K Ohm NTC Type 2, 18-Inch | Midwest Supply Us
QAM2030.045 | Duct Point Temperature Sensor, 10K Ohm NTC Type 2, 18-Inch | Siemens Building Technology
Brand: Siemens Building Technology
SKU: QAM2030.045
$34.82 each
View Details Siemens Building Technology QAA2290.FWSC Room Temperature Sensor, Wireless - Mesh, Full Feature, Siemens Logo | Midwest Supply Us
QAA2290.FWSC | Room Temperature Sensor, Wireless - Mesh, Full Feature, Siemens Logo | Siemens Building Technology
Brand: Siemens Building Technology
SKU: QAA2290.FWSC
View Details
View Details Siemens Building Technology QAE2030.010 Immersion Well Temperature Sensor, 10K Ohm Type 2, 4-inch | Midwest Supply Us
QAE2030.010 | Immersion Well Temperature Sensor, 10K Ohm Type 2, 4-inch | Siemens Building Technology
Brand: Siemens Building Technology
SKU: QAE2030.010
$61.64 each
View Details Siemens Building Technology AQM2200 MOUNTING KIT FOR DUCT POINT SENSOR | Midwest Supply Us
AQM2200 | MOUNTING KIT FOR DUCT POINT SENSOR | Siemens Building Technology
Brand: Siemens Building Technology
SKU: AQM2200
$68.21 each
View Details Siemens Building Technology 7MF15654BG105EA1 SENSOR, LIQUID/GAS, 0-10V, 0-100 PSIG | Midwest Supply Us
7MF15654BG105EA1 | SENSOR, LIQUID/GAS, 0-10V, 0-100 PSIG | Siemens Building Technology
Brand: Siemens Building Technology
SKU: 7MF15654BG105EA1
$304.52 each
View Details Siemens Building Technology 536-376 Air Velocity Sensor Pickup Probe Kit, 2-pipe, 6" (152 mm) | Midwest Supply Us
536-376 | Air Velocity Sensor Pickup Probe Kit, 2-pipe, 6" (152 mm) | Siemens Building Technology
Brand: Siemens Building Technology
SKU: 536-376
$77.54 each
View Details Siemens Building Technology 536-378 Air Velocity Sensor Pickup Probe Kit, 2-pipe, 8" (203 mm) | Midwest Supply Us
536-378 | Air Velocity Sensor Pickup Probe Kit, 2-pipe, 8" (203 mm) | Siemens Building Technology
Brand: Siemens Building Technology
SKU: 536-378
$77.54 each
View Details Siemens Building Technology 535-490-36 Rigid Averaging Duct Sensor, 20 to 120 Deg F, 36-Inch | Midwest Supply Us
535-490-36 | Rigid Averaging Duct Sensor, 20 to 120 Deg F, 36-Inch | Siemens Building Technology
Brand: Siemens Building Technology
SKU: 535-490-36
$162.86 each
View Details Siemens Building Technology 533-380-8 Flexible Averaging Duct Sensor, 20 to 120 Deg F, 8-Foot | Midwest Supply Us
533-380-8 | Flexible Averaging Duct Sensor, 20 to 120 Deg F, 8-Foot | Siemens Building Technology
Brand: Siemens Building Technology
SKU: 533-380-8
$121.49 each
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