Duct Sensors: Essential for HVAC Efficiency and Comfort

Midwest Supply offers a wide selection of duct sensors for precise airflow temperature and humidity monitoring. Our sensors are designed to ensure optimal HVAC performance, prevent costly damage, and maintain comfortable indoor environments.
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View Details ACI A/AN-D-6"-PB 10K ohm Type III | Duct Temperature Sensor | Sensor Length: 6 inch | Plastic Box Plain Housing Enclosure Box | Midwest Supply Us
A/AN-D-6"-PB | 10K ohm Type III | Duct Temperature Sensor | Sensor Length: 6 inch | Plastic Box Plain Housing Enclosure Box | ACI
Brand: ACI
SKU: A/AN-D-6"-PB
$16.68 each
View Details ACI A/AN-DO-4"-10'CL2P 10K ohm Type III | Duct Temperature Sensor | Sensor Length: 4 inch | Included Wire Length: 10 feet | CL2P | Midwest Supply Us
A/AN-DO-4"-10'CL2P | 10K ohm Type III | Duct Temperature Sensor | Sensor Length: 4 inch | Included Wire Length: 10 feet | CL2P | ACI
Brand: ACI
SKU: A/AN-DO-4"-10'CL2P
$26.46 each
View Details ACI A/AN-DO-6" 10K ohm Type III | Duct Temperature Sensor | Sensor Length: 6 inch | Midwest Supply Us
A/AN-DO-6" | 10K ohm Type III | Duct Temperature Sensor | Sensor Length: 6 inch | ACI
Brand: ACI
SKU: A/AN-DO-6"
$15.59 each
View Details ACI A/AN-D-8"-PB 10K ohm Type III | Duct Temperature Sensor | Sensor Length: 8 inch | Plastic Box Plain Housing Enclosure Box | Midwest Supply Us
A/AN-D-8"-PB | 10K ohm Type III | Duct Temperature Sensor | Sensor Length: 8 inch | Plastic Box Plain Housing Enclosure Box | ACI
Brand: ACI
SKU: A/AN-D-8"-PB
$16.68 each
View Details Siemens 533-376-8 Duct Point Temperature Sensor, Platinum, 20 to 120 Deg F, 8-Inch | Midwest Supply Us
533-376-8 | Duct Point Temperature Sensor, Platinum, 20 to 120 Deg F, 8-Inch | Siemens
Brand: Siemens
SKU: 533-376-8
$82.38 each
View Details ACI A/20K-D-6"-PB 20K ohm | Duct Temperature Sensor | Sensor Length: 6 inch | Plastic Box Plain Housing Enclosure Box | Midwest Supply Us
A/20K-D-6"-PB | 20K ohm | Duct Temperature Sensor | Sensor Length: 6 inch | Plastic Box Plain Housing Enclosure Box | ACI
Brand: ACI
SKU: A/20K-D-6"-PB
$16.31 each
View Details ACI A/100-3W-D-8"-GD RTD 100 ohm (3 wire) | Duct Temperature Sensor | Sensor Length: 8 inch | Galvanized Housing Enclosure Box | Midwest Supply Us
A/100-3W-D-8"-GD | RTD 100 ohm (3 wire) | Duct Temperature Sensor | Sensor Length: 8 inch | Galvanized Housing Enclosure Box | ACI
Brand: ACI
SKU: A/100-3W-D-8"-GD
$24.65 each
View Details Mamac TE-211Z-D-G-1-1-E-2 4-20mA | 40-140F | Aluminum Tube Averaging Temperature Sensor | Averaging Wire Length: 12 feet | 24VDC Powered | Galvanized Housing | Midwest Supply Us
TE-211Z-D-G-1-1-E-2 | 4-20mA | 40-140F | Aluminum Tube Averaging Temperature Sensor | Averaging Wire Length: 12 feet | 24VDC Powered | Galvanized Housing | Mamac
Brand: Mamac
SKU: TE-211Z-D-G-1-1-E-2
$158.85 each
View Details Mamac TE-702-B-1-C 100 ohm (2 wire) | Duct Temperature Sensor | Sensor Length: 8 inch | Galvanized Housing | Midwest Supply Us
TE-702-B-1-C | 100 ohm (2 wire) | Duct Temperature Sensor | Sensor Length: 8 inch | Galvanized Housing | Mamac
Brand: Mamac
SKU: TE-702-B-1-C
$19.85 each
View Details Siemens QFA32SS.FWSN Humidity&Temp Room Unit, 2%, selectable RH&T, Display, Temp Setpt, Override | Midwest Supply Us
QFA32SS.FWSN | Humidity&Temp Room Unit, 2%, selectable RH&T, Display, Temp Setpt, Override | Siemens
Brand: Siemens
SKU: QFA32SS.FWSN
$244.52 each
View Details Siemens QFA3212.FWNN ROOM RHT 1K OHM PT(385) FULL HMI NO LOGO | Midwest Supply Us
QFA3212.FWNN | ROOM RHT 1K OHM PT(385) FULL HMI NO LOGO | Siemens
Brand: Siemens
SKU: QFA3212.FWNN
$224.98 each
View Details Siemens 533-376-18 Duct Point Temperature Sensor, Platinum, 20 to 120 Deg F, 18-Inch | Midwest Supply Us
533-376-18 | Duct Point Temperature Sensor, Platinum, 20 to 120 Deg F, 18-Inch | Siemens
Brand: Siemens
SKU: 533-376-18
$86.18 each
View Details Siemens QFM81.2 Duct Hygrostat with External Setpoint, 30 - 90% RH | Midwest Supply Us
QFM81.2 | Duct Hygrostat with External Setpoint, 30 - 90% RH | Siemens
Brand: Siemens
SKU: QFM81.2
$160.63 each
View Details Siemens SAS81.33U Powermite 599 MT Series SAS Electronic Valve Actuator, SR, 24V, Float Control | Midwest Supply Us
SAS81.33U | Powermite 599 MT Series SAS Electronic Valve Actuator, SR, 24V, Float Control | Siemens
Brand: Siemens
SKU: SAS81.33U
$305.95 each
View Details Siemens 544-339-4 Duct Point Sensor, 1K Ohm Platinum (375 Alpha), 4-Inch | Midwest Supply Us
544-339-4 | Duct Point Sensor, 1K Ohm Platinum (375 Alpha), 4-Inch | Siemens
Brand: Siemens
SKU: 544-339-4
$39.55 each
View Details ACI A/CP-DO-8" 10K ohm Type II | Duct Temperature Sensor | Sensor Length: 8 inch | Midwest Supply Us
A/CP-DO-8" | 10K ohm Type II | Duct Temperature Sensor | Sensor Length: 8 inch | ACI
Brand: ACI
SKU: A/CP-DO-8"
$15.59 each
View Details ACI A/1K-2W-D-8"-PB RTD 1000 ohm (2 wire) | Duct Temperature Sensor | Sensor Length: 8 inch | Plastic Box Plain Housing Enclosure Box | Midwest Supply Us
A/1K-2W-D-8"-PB | RTD 1000 ohm (2 wire) | Duct Temperature Sensor | Sensor Length: 8 inch | Plastic Box Plain Housing Enclosure Box | ACI
Brand: ACI
SKU: A/1K-2W-D-8"-PB
$24.29 each
View Details ACI A/1K-2W-DO-6" RTD 1000 ohm (2 wire) | Duct Temperature Sensor | Sensor Length: 6 inch | Midwest Supply Us
A/1K-2W-DO-6" | RTD 1000 ohm (2 wire) | Duct Temperature Sensor | Sensor Length: 6 inch | ACI
Brand: ACI
SKU: A/1K-2W-DO-6"
$24.29 each
View Details Siemens QFM3101 Duct Relative Humidity Sensor, 2 percent accuracy, 4-20 mA | Midwest Supply Us
QFM3101 | Duct Relative Humidity Sensor, 2 percent accuracy, 4-20 mA | Siemens
Brand: Siemens
SKU: QFM3101
$228.70 each
View Details ACI A/RH1-D 1% Accuracy RH Humidity Sensor | Duct Humidity Sensor | Midwest Supply Us
A/RH1-D | 1% Accuracy RH Humidity Sensor | Duct Humidity Sensor | ACI
Brand: ACI
SKU: A/RH1-D
$343.33 each
View Details Belimo 22DTM-56 Duct CO2+Temp+Hum Sensor BAC | Midwest Supply Us
22DTM-56 | Duct CO2+Temp+Hum Sensor BAC | Belimo
Brand: Belimo
SKU: 22DTM-56
$612.45 each
View Details Belimo 22DTM-5106 Duct CO2+Temp+Hum Sensor LCD V | Midwest Supply Us
22DTM-5106 | Duct CO2+Temp+Hum Sensor LCD V | Belimo
Brand: Belimo
SKU: 22DTM-5106
$697.95 each
View Details Belimo 22DTM-51 Duct CO2+Temp+Hum Sensor V | Midwest Supply Us
22DTM-51 | Duct CO2+Temp+Hum Sensor V | Belimo
Brand: Belimo
SKU: 22DTM-51
$598.05 each
View Details Belimo 22DTM-16 Duct CO2+Temp+Hum Sensor BAC | Midwest Supply Us
22DTM-16 | Duct CO2+Temp+Hum Sensor BAC | Belimo
Brand: Belimo
SKU: 22DTM-16
$612.45 each
Communication
Element Type
Humidity Output
Sensing Element
Sensor
Sensor Configuration
Sensor Housing
Sensor Length
Sensor Wire Length
Temp & Humidity Signals
Temperature Sensor
Voltage
°F or °C Display
Committed to customer satisfaction
as experts in Duct Sensors
(847) 773-1023

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Norgas Controls NGR02-BBA GAS REGULATOR | 3/4" NPT | 1/4" Orifice | GREEN SPRING 6.5"-16" WC| | Midwest Supply Us
NGR02-BBA | Gas Regulator | 3/4" NPT | 1/4" Orifice | Green Spring 6.5"-16"wc | Norgas Controls
Brand: Norgas Controls
SKU: NGR02-BBA
$82.63
BAPI BA/10K-2-H210-D-BBX Duct Humidity (%RH) Sensor with Optional Temperature Sensor | Midwest Supply Us
BA/10K-2-H210-D-BBX | Duct Humidity (%RH) Sensor with Optional Temperature Sensor | BAPI
Brand: BAPI
SKU: BA/10K-2-H210-D-BBX
$108.17
Norgas Controls N5D-1500-S GAS REGULATOR, 1-1/2" NPT, SILVER SPRING 7-11"WC, 2 PSI CSA | Midwest Supply Us
N5D-1500-S | GAS REGULATOR, 1-1/2" NPT, SILVER SPRING 7-11"WC, 2 PSI CSA | Norgas Controls
Brand: Norgas Controls
SKU: N5D-1500-S
$252.54
BAPI ZPS-ACC04-1 Room Pressure Pickup Ports with Temperature Sensor | Midwest Supply Us
ZPS-ACC04-1 | Room Pressure Pickup Ports with Temperature Sensor | BAPI
Brand: BAPI
SKU: ZPS-ACC04-1
$16.77
Belimo B214 Characterized Control Valve (CCV), 1/2", 2-way | Midwest Supply Us
B214 | Characterized Control Valve (CCV), 1/2", 2-way | Belimo
Brand: Belimo
SKU: B214
$90.90
Everflow EPRC1501-NL EVERFLOW 1-1/2" X 1" PEX BARB RED. COUPLING LEAD FREE | Midwest Supply Us
EPRC1501-NL | EVERFLOW 1-1/2" X 1" PEX BARB RED. COUPLING LEAD FREE | Everflow
Brand: Everflow
SKU: EPRC1501-NL
$9.81
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