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 BAPI BA/10K-2-D-12"-BBX Duct Temperature Sensor | Midwest Supply Us
BA/10K-2-D-12"-BBX | Duct Temperature Sensor | BAPI
Brand: BAPI
SKU: BA/10K-2-D-12"-BBX
$10.48 each
View Details BAPI BA/NO2-D-BB NO2 - Duct and Rough Service Nitrogen Dioxide Sensor - Duct Unit with Aspiration Tube | Midwest Supply Us
BA/NO2-D-BB | NO2 - Duct and Rough Service Nitrogen Dioxide Sensor - Duct Unit with Aspiration Tube | BAPI
Brand: BAPI
SKU: BA/NO2-D-BB
$461.18 each
View Details BAPI BA/CO-D-BB CO - Duct and Rough Service Carbon Monoxide Sensor - Duct Unit with Aspiration Tube | Midwest Supply Us
BA/CO-D-BB | CO - Duct and Rough Service Carbon Monoxide Sensor - Duct Unit with Aspiration Tube | BAPI
Brand: BAPI
SKU: BA/CO-D-BB
$348.82 each
View Details Siemens 536-384 Air Velocity Sensor Pickup Probe Kit, 2-pipe, 14" (356 mm) | Midwest Supply Us
536-384 | Air Velocity Sensor Pickup Probe Kit, 2-pipe, 14" (356 mm) | Siemens
Brand: Siemens
SKU: 536-384
$79.55 each
View Details Siemens 535-490-18 Rigid Averaging Duct Sensor, 20 to 120 Deg F, 18-Inch | Midwest Supply Us
535-490-18 | Rigid Averaging Duct Sensor, 20 to 120 Deg F, 18-Inch | Siemens
Brand: Siemens
SKU: 535-490-18
$97.17 each
View Details Siemens 544-343-18 Rigid Averaging Duct Sensor, 1K Ohm Platinum, 18-Inch | Midwest Supply Us
544-343-18 | Rigid Averaging Duct Sensor, 1K Ohm Platinum, 18-Inch | Siemens
Brand: Siemens
SKU: 544-343-18
$85.10 each
View Details Siemens 535-490-24 Rigid Averaging Duct Sensor, 20 to 120 Deg F, 24-Inch | Midwest Supply Us
535-490-24 | Rigid Averaging Duct Sensor, 20 to 120 Deg F, 24-Inch | Siemens
Brand: Siemens
SKU: 535-490-24
$103.33 each
View Details Siemens 544-342-16 Flexible Averaging Duct Sensor, 1K Ohm Platinum, 16-Foot | Midwest Supply Us
544-342-16 | Flexible Averaging Duct Sensor, 1K Ohm Platinum, 16-Foot | Siemens
Brand: Siemens
SKU: 544-342-16
$114.46 each
View Details Siemens QFM4160 Duct RH and Temp Sensor, 2 percent certified, RH: 0-10 Vdc, T: 0-10 Vdc | Midwest Supply Us
QFM4160 | Duct RH and Temp Sensor, 2 percent certified, RH: 0-10 Vdc, T: 0-10 Vdc | Siemens
Brand: Siemens
SKU: QFM4160
$606.76 each
View Details Siemens QAM2171.040 Duct Temperature Sensor, 4 to 20 mA, 16-Inch | Midwest Supply Us
QAM2171.040 | Duct Temperature Sensor, 4 to 20 mA, 16-Inch | Siemens
Brand: Siemens
SKU: QAM2171.040
$126.87 each
View Details Siemens 540-128 10K Ohm Duct Temperature Sensor | Midwest Supply Us
540-128 | 10K Ohm Duct Temperature Sensor | Siemens
Brand: Siemens
SKU: 540-128
$40.10 each
View Details Siemens QFM3171 Duct RH and Temp Sensor, 2 percent (high) accuracy, RH: 4-20 4 T: 4-20 mA | Midwest Supply Us
QFM3171 | Duct RH and Temp Sensor, 2 percent (high) accuracy, RH: 4-20 4 T: 4-20 mA | Siemens
Brand: Siemens
SKU: QFM3171
$252.36 each
View Details Siemens QPM2100 Duct Sensor CO2, 0 to 10V | Midwest Supply Us
QPM2100 | Duct Sensor CO2, 0 to 10V | Siemens
Brand: Siemens
SKU: QPM2100
$428.12 each
View Details Siemens QFM3160 Duct RH and Temp Sensor, 2 percent (high) accuracy, RH: 0-10 Vdc, T: 0-10 Vdc | Midwest Supply Us
QFM3160 | Duct RH and Temp Sensor, 2 percent (high) accuracy, RH: 0-10 Vdc, T: 0-10 Vdc | Siemens
Brand: Siemens
SKU: QFM3160
$252.36 each
View Details ACI A/CP-D-6"-PB 10K ohm Type II | Duct Temperature Sensor | Sensor Length: 6 inch | Plastic Box Plain Housing Enclosure Box | Midwest Supply Us
A/CP-D-6"-PB | 10K ohm Type II | Duct Temperature Sensor | Sensor Length: 6 inch | Plastic Box Plain Housing Enclosure Box | ACI
Brand: ACI
SKU: A/CP-D-6"-PB
$15.95 each
View Details Siemens 533-380-24 Flexible Averaging Duct Sensor, 20 to 120 Deg F, 25-Foot | Midwest Supply Us
533-380-24 | Flexible Averaging Duct Sensor, 20 to 120 Deg F, 25-Foot | Siemens
Brand: Siemens
SKU: 533-380-24
$151.56 each
View Details Siemens 544-339-8 Duct Point Sensor, 1K Ohm Platinum (375 Alpha), 8-Inch | Midwest Supply Us
544-339-8 | Duct Point Sensor, 1K Ohm Platinum (375 Alpha), 8-Inch | Siemens
Brand: Siemens
SKU: 544-339-8
$41.06 each
View Details Siemens QFM2100 Duct Relative Humidity Sensor, 5 percent accuracy, 0-10 Vdc | Midwest Supply Us
QFM2100 | Duct Relative Humidity Sensor, 5 percent accuracy, 0-10 Vdc | Siemens
Brand: Siemens
SKU: QFM2100
$160.20 each
View Details Siemens 544-560-18 Duct Point Sensor, Platinum, -4 to 122 Deg F, 18-Inch | Midwest Supply Us
544-560-18 | Duct Point Sensor, Platinum, -4 to 122 Deg F, 18-Inch | Siemens
Brand: Siemens
SKU: 544-560-18
$84.66 each
View Details Siemens QFM3100 Duct Relative Humidity Temperature Sensor, 2 percent accuracy, 0-10 Vdc | Midwest Supply Us
QFM3100 | Duct Relative Humidity Temperature Sensor, 2 percent accuracy, 0-10 Vdc | Siemens
Brand: Siemens
SKU: QFM3100
$228.70 each
View Details ACI A/CP-D-4"-PB 10K ohm Type II | Duct Temperature Sensor | Sensor Length: 4 inch | Plastic Box Plain Housing Enclosure Box | Midwest Supply Us
A/CP-D-4"-PB | 10K ohm Type II | Duct Temperature Sensor | Sensor Length: 4 inch | Plastic Box Plain Housing Enclosure Box | ACI
Brand: ACI
SKU: A/CP-D-4"-PB
$15.95 each
View Details ACI A/AN-D-4"-PB 10K ohm Type III | Duct Temperature Sensor | Sensor Length: 4 inch | Plastic Box Plain Housing Enclosure Box | Midwest Supply Us
A/AN-D-4"-PB | 10K ohm Type III | Duct Temperature Sensor | Sensor Length: 4 inch | Plastic Box Plain Housing Enclosure Box | ACI
Brand: ACI
SKU: A/AN-D-4"-PB
$15.95 each
View Details Siemens 544-339-18 Duct Point Sensor, 1K Ohm Platinum (375 Alpha), 18-Inch | Midwest Supply Us
544-339-18 | Duct Point Sensor, 1K Ohm Platinum (375 Alpha), 18-Inch | Siemens
Brand: Siemens
SKU: 544-339-18
$42.99 each
View Details Siemens 535-741-8 Duct Point Temperature Sensor, 100K Ohm Platinum NTC Type 2, 8-Inch | Midwest Supply Us
535-741-8 | Duct Point Temperature Sensor, 100K Ohm Platinum NTC Type 2, 8-Inch | Siemens
Brand: Siemens
SKU: 535-741-8
$32.17 each
Communication
Dimension Depth
Dimension Height
Dimension Probe Diameter
Dimension Probe Length
Dimension Width
Element Type
Enclosure Material
Humidity Output
Measurement Type
Mounting
Operating Temperature
Output Specifications
Outputs
Range
Sensing Element
Sensor
Sensor Configuration
Sensor Housing
Sensor Length
Sensor Wire Length
Temp & Humidity Signals
Temperature Calibration Certificate
Temperature Measurement Accuracy
Temperature Measurement Range
Temperature Sensor
Temperature Sensor Type
Voltage
Warranty
°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
$86.98
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 7-11"WC CSA | Midwest Supply Us
N5D-1500-S | GAS REGULATOR 1-1/2" NPT 7-11"WC CSA | Norgas Controls
Brand: Norgas Controls
SKU: N5D-1500-S
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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
$83.70
Everflow EPRC1501-NL 1-1/2" X 1" F1807 PEX Reducing Coupling Lead Free | Midwest Supply Us
EPRC1501-NL | 1-1/2" X 1" F1807 PEX Reducing Coupling Lead Free | Everflow
Brand: Everflow
SKU: EPRC1501-NL
$12.38
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