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Collection: By Manufacturer: Siemens

Siemens Building Technologies offers integrated, data-driven automation systems specializing in HVAC, lighting, and security. Together, the focus is to optimize energy efficiency, safety, and occupant experience in commercial and public buildings worldwide. Shop all of the Siemens products that we offer.

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Siemens QBE3100UD50 Liquid Differential Pressure Sensor, 0-50 PSI

Siemens QBE3100UD50 Liquid Differential Pressure Sensor, 0-50 PSI

Regular price $493.57 USD

Regular price Sale price $493.57 USD
Siemens QBE3100UD25 Liquid Differential Pressure Sensor, 0-25 PSI

Siemens QBE3100UD25 Liquid Differential Pressure Sensor, 0-25 PSI

Regular price $493.57 USD

Regular price Sale price $493.57 USD
Siemens QBE3100UD100 Liquid Differential Pressure Sensor, 0-100 PSI

Siemens QBE3100UD100 Liquid Differential Pressure Sensor, 0-100 PSI

Regular price $493.57 USD

Regular price Sale price $493.57 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.

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 USD

Regular price Sale price $269.99 USD
Siemens QFA32SS.FWNN Room Humidity and Temperature Sensor, 0-10V / 0-5V / 4-20 mA (selectable), Full Feature, No Logo.

Siemens QFA32SS.FWNN Room Humidity and Temperature Sensor, 0-10V / 0-5V / 4-20 mA (selectable), Full Feature, No Logo.

Regular price $269.88 USD

Regular price Sale 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.

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 USD

Regular price Sale price $195.81 USD
Siemens QFA32SS.EWNN Room Humidity and Temperature Sensor, 0-10V / 0-5V / 4-20 mA (selectable), No HMI, No Logo.

Siemens QFA32SS.EWNN Room Humidity and Temperature Sensor, 0-10V / 0-5V / 4-20 mA (selectable), No HMI, No Logo.

Regular price $195.78 USD

Regular price Sale price $195.78 USD
Siemens QFA3280.FWSC Room Temp Sensor, RH 2%, for TEC, Digital signal, Sense & with Display, Override, Temp Setpoint, Tool Port.

Siemens QFA3280.FWSC Room Temp Sensor, RH 2%, for TEC, Digital signal, Sense & with Display, Override, Temp Setpoint, Tool Port.

Regular price $270.48 USD

Regular price Sale 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.

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 USD

Regular price Sale price $326.66 USD
Siemens QFA3280.EWSC Room Temp Sensor, RH 2%, for TEC, Digital signal, Temp Sensing, Tool Port.

Siemens QFA3280.EWSC Room Temp Sensor, RH 2%, for TEC, Digital signal, Temp Sensing, Tool Port.

Regular price $154.56 USD

Regular price Sale price $154.56 USD
Siemens QFA3280.EWNC Room Temp Sensor, RH 2%, for TEC, Digital signal, Temp Sensing, No Logo, Tool Port.

Siemens QFA3280.EWNC Room Temp Sensor, RH 2%, for TEC, Digital signal, Temp Sensing, No Logo, Tool Port.

Regular price $154.56 USD

Regular price Sale price $154.56 USD
Siemens QFA3280.DWSC Room Temp Sensor, RH 2%, for TEC, Digital signal, Sense & with Display, Tool Port.

Siemens QFA3280.DWSC Room Temp Sensor, RH 2%, for TEC, Digital signal, Sense & with Display, Tool Port.

Regular price $261.34 USD

Regular price Sale price $261.34 USD
Siemens QFA3230.FWNN Room Humidity (0-10V) and Temperature Sensor (10k Ohm Type 2 Thermistor), Full Featuire, No Logo.

Siemens QFA3230.FWNN Room Humidity (0-10V) and Temperature Sensor (10k Ohm Type 2 Thermistor), Full Featuire, No Logo.

Regular price $235.99 USD

Regular price Sale price $235.99 USD
Siemens QFA3212.FWSN Room Humidity (0-10V) and Temperature Sensor (Platinum 1K Ohm 385 Alpha), Full Feature, Siemens Logo.

Siemens QFA3212.FWSN Room Humidity (0-10V) and Temperature Sensor (Platinum 1K Ohm 385 Alpha), Full Feature, Siemens Logo.

Regular price $248.07 USD

Regular price Sale price $248.07 USD
Siemens QFA3212.FWNN Room RH and Temperature Sensor 1K OHM PT(385) Full HMI, No Logo.

Siemens QFA3212.FWNN Room RH and Temperature Sensor 1K OHM PT(385) Full HMI, No Logo.

Regular price $248.41 USD

Regular price Sale price $248.41 USD
Siemens QFA3212.EWSN Room Humidity (0-10V) and Temperature Sensor (Platinum 1K Ohm 385 Alpha), No HMI, Siemens Logo.

Siemens QFA3212.EWSN Room Humidity (0-10V) and Temperature Sensor (Platinum 1K Ohm 385 Alpha), No HMI, Siemens Logo.

Regular price $209.45 USD

Regular price Sale price $209.45 USD
Siemens QFA3212.EWNN Room RH and Temperature Sensor, 1K OHM PT(385) Blank, No Logo.

Siemens QFA3212.EWNN Room RH and Temperature Sensor, 1K OHM PT(385) Blank, No Logo.

Regular price $209.28 USD

Regular price Sale price $209.28 USD
Siemens QPA2062D Room Sensor CO2, Temperature, Relative Humidity with Display, 0-10V

Siemens QPA2062D Room Sensor CO2, Temperature, Relative Humidity with Display, 0-10V

Regular price $665.33 USD

Regular price Sale price $665.33 USD
Siemens QPA2062 Room Sensor CO2, Temperature, Relative Humidity, 0 to 10V

Siemens QPA2062 Room Sensor CO2, Temperature, Relative Humidity, 0 to 10V

Regular price $613.21 USD

Regular price Sale price $613.21 USD
Siemens QPA2060D Room Sensor CO2 and Temperature with Display, 0 to 10V

Siemens QPA2060D Room Sensor CO2 and Temperature with Display, 0 to 10V

Regular price $503.69 USD

Regular price Sale price $503.69 USD
Siemens QPA2060 Room Sensor CO2 and Temperature, 0 to 10V

Siemens QPA2060 Room Sensor CO2 and Temperature, 0 to 10V

Regular price $455.70 USD

Regular price Sale price $455.70 USD
Siemens QPA2002D Room sensor CO2 and VOC with Display, 0 to 10V

Siemens QPA2002D Room sensor CO2 and VOC with Display, 0 to 10V

Regular price $535.10 USD

Regular price Sale price $535.10 USD
Siemens QPA2002 Room Sensor CO2 and VOC, 0 to 10V

Siemens QPA2002 Room Sensor CO2 and VOC, 0 to 10V

Regular price $465.46 USD

Regular price Sale price $465.46 USD
Siemens QPA2000 Room Sensor CO2, 0 to 10V, Room Sensor CO2, 0 to 10V

Siemens QPA2000 Room Sensor CO2, 0 to 10V, Room Sensor CO2, 0 to 10V

Regular price $344.95 USD

Regular price Sale price $344.95 USD
Siemens QPM2162 IAQ Duct Sensor CO2, Temperature, Relative Humidity, 0 to 10V

Siemens QPM2162 IAQ Duct Sensor CO2, Temperature, Relative Humidity, 0 to 10V

Regular price $682.20 USD

Regular price Sale price $682.20 USD
Siemens QPM2160D IAQ Duct CO2, Temperature Sensor, 0-10V, Display

Siemens QPM2160D IAQ Duct CO2, Temperature Sensor, 0-10V, Display

Regular price $671.26 USD

Regular price Sale price $671.26 USD
Siemens QPM2160 IAQ Duct Sensor CO2 and Temperature, 0 to 10V

Siemens QPM2160 IAQ Duct Sensor CO2 and Temperature, 0 to 10V

Regular price $599.15 USD

Regular price Sale price $599.15 USD
Siemens QPM2102D IAQ Duct Sensor CO2 and VOC with Display, 0 to 10V

Siemens QPM2102D IAQ Duct Sensor CO2 and VOC with Display, 0 to 10V

Regular price $621.43 USD

Regular price Sale price $621.43 USD
Siemens QPM2102 IAQ Duct Sensor CO2 and VOC, 0 to 10V

Siemens QPM2102 IAQ Duct Sensor CO2 and VOC, 0 to 10V

Regular price $528.43 USD

Regular price Sale price $528.43 USD
Siemens QPM2100 IAQ Duct Sensor CO2, 0 to 10V

Siemens QPM2100 IAQ Duct Sensor CO2, 0 to 10V

Regular price $463.00 USD

Regular price Sale price $463.00 USD
Siemens GCA226.1U Spring Return, 160 lb-in (18 Nm), 120 Vac, 2-position Control, 90 sec Run, 2-Aux

Siemens GCA226.1U Spring Return, 160 lb-in (18 Nm), 120 Vac, 2-position Control, 90 sec Run, 2-Aux

Regular price $389.18 USD

Regular price Sale price $389.18 USD
Siemens GCA221.1U/B Spring Return, 160 lb-in (18 Nm), 120 Vac, 2-position Control, 90 sec Run, Bulk 8

Siemens GCA221.1U/B Spring Return, 160 lb-in (18 Nm), 120 Vac, 2-position Control, 90 sec Run, Bulk 8

Regular price $2,576.93 USD

Regular price Sale price $2,576.93 USD
Siemens GCA221.1U Spring Return, 160 lb-in (18 Nm), 120 Vac, 2-position Control, 90 sec Run

Siemens GCA221.1U Spring Return, 160 lb-in (18 Nm), 120 Vac, 2-position Control, 90 sec Run

Regular price $359.19 USD

Regular price Sale price $359.19 USD
Siemens GCA166.1U Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, 0-10 Vdc Control, 90 sec Run, Feedback, 2-Aux

Siemens GCA166.1U Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, 0-10 Vdc Control, 90 sec Run, Feedback, 2-Aux

Regular price $434.99 USD

Regular price Sale price $434.99 USD
Siemens GCA166.1P Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, 0-10 Vdc Control, 90 sec Run, Feedback, 2-Aux, Plenum

Siemens GCA166.1P Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, 0-10 Vdc Control, 90 sec Run, Feedback, 2-Aux, Plenum

Regular price $441.70 USD

Regular price Sale price $441.70 USD
Siemens GCA164.1U Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, 0-10 Vdc Control, 90 sec Run, Feedback, Offset-Span, 2-Aux

Siemens GCA164.1U Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, 0-10 Vdc Control, 90 sec Run, Feedback, Offset-Span, 2-Aux

Regular price $470.54 USD

Regular price Sale price $470.54 USD
Siemens GCA164.1P Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, 0-10 Vdc Control, 90 sec Run, Feedback, Offset-Span, 2-Aux, Plenum

Siemens GCA164.1P Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, 0-10 Vdc Control, 90 sec Run, Feedback, Offset-Span, 2-Aux, Plenum

Regular price $480.90 USD

Regular price Sale price $480.90 USD
Siemens GCA163.1U Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, 0-10 Vdc Control, 90 sec Run, Feedback, Offset-Span

Siemens GCA163.1U Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, 0-10 Vdc Control, 90 sec Run, Feedback, Offset-Span

Regular price $420.23 USD

Regular price Sale price $420.23 USD
Siemens GCA163.1P Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, 0-10 Vdc Control, 90 sec Run, Feedback, Offset-Span, Plenum

Siemens GCA163.1P Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, 0-10 Vdc Control, 90 sec Run, Feedback, Offset-Span, Plenum

Regular price $430.59 USD

Regular price Sale price $430.59 USD
Siemens GCA161.1U Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, 0-10 Vdc Control, 90 sec Run, Feedback

Siemens GCA161.1U Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, 0-10 Vdc Control, 90 sec Run, Feedback

Regular price $387.55 USD

Regular price Sale price $387.55 USD
Siemens GCA161.1P Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, 0-10 Vdc Control, 90 sec Run, Feedback, Plenum

Siemens GCA161.1P Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, 0-10 Vdc Control, 90 sec Run, Feedback, Plenum

Regular price $396.31 USD

Regular price Sale price $396.31 USD
Siemens GCA156.1U Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, 2-10 Vdc Control, 90 sec Run, Feedback, Signal Inversion, 2-Aux

Siemens GCA156.1U Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, 2-10 Vdc Control, 90 sec Run, Feedback, Signal Inversion, 2-Aux

Regular price $442.43 USD

Regular price Sale price $442.43 USD
Siemens GCA156.1P Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, 2-10 Vdc Control, 90 sec Run, Feedback, Signal Inversion, 2-Aux, Plenum

Siemens GCA156.1P Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, 2-10 Vdc Control, 90 sec Run, Feedback, Signal Inversion, 2-Aux, Plenum

Regular price $453.92 USD

Regular price Sale price $453.92 USD
Siemens GCA151.1U Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, 2-10 Vdc Control, 90 sec Run, Feedback, Signal Inversion

Siemens GCA151.1U Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, 2-10 Vdc Control, 90 sec Run, Feedback, Signal Inversion

Regular price $400.76 USD

Regular price Sale price $400.76 USD
Siemens GCA151.1P Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, 2-10 Vdc Control, 90 sec Run, Feedback, Signal Inversion, Plenum

Siemens GCA151.1P Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, 2-10 Vdc Control, 90 sec Run, Feedback, Signal Inversion, Plenum

Regular price $407.05 USD

Regular price Sale price $407.05 USD
Siemens GCA136.1U Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, Floating Control, 90 sec Run, 2-Aux

Siemens GCA136.1U Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, Floating Control, 90 sec Run, 2-Aux

Regular price $434.09 USD

Regular price Sale price $434.09 USD
Siemens GCA136.1P Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, Floating Control, 90 sec Run, 2-Aux, Plenum

Siemens GCA136.1P Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, Floating Control, 90 sec Run, 2-Aux, Plenum

Regular price $442.17 USD

Regular price Sale price $442.17 USD
Siemens GCA132.1U Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, Floating Control, 90 sec Run, Feedback

Siemens GCA132.1U Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, Floating Control, 90 sec Run, Feedback

Regular price $398.85 USD

Regular price Sale price $398.85 USD
Siemens GCA131.1U Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, Floating Control, 90 sec Run

Siemens GCA131.1U Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, Floating Control, 90 sec Run

Regular price $387.31 USD

Regular price Sale price $387.31 USD
Siemens GCA131.1P Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, Floating Control, 90 sec Run, Plenum

Siemens GCA131.1P Spring Return, 160 lb-in (18 Nm), 24 Vac/dc, Floating Control, 90 sec Run, Plenum

Regular price $390.39 USD

Regular price Sale price $390.39 USD

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