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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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Aaon Sensors
AERCO Boiler and Water Heater Sensors
AJ Antunes Sensors
Armstrong Furnace Sensors
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Baltimore Parts Sensors
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Barber Colman Sensors
Bard HVAC Sensors
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Bell Gossett Sensors
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Bradford White Sensors
Broan Fans Sensors
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Buderus Sensors
Burnham Boilers Sensors
Carlin Sensors
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Chicago Faucet Co Sensors
ClimateMaster Sensors
Copeland Sensors
Daikin-McQuay Sensors
Danfoss Sensors
DriSteem Sensors
Eclipse Sensors
EWC Controls Sensors
Fenwal Sensors
Fireye Sensors
GE Sensing-General Eastern Sensors
Greenheck Sensors
Grundfos Sensors
Grundfos Circulators Sensors
Haier A/C Sensors
Heat Transfer Prod Sensors
Heatcraft Refrigeration Sensors
Honeywell Sensors
Honeywell E-MON Meters Sensors
Honeywell Home Sensors
Honeywell Inc Sensors
Hydrolevel/Safeguard Sensors
ICM Controls Sensors
Indeeco Sensors
Intellihot Sensors
International Comfort Products Sensors
J/B Industries SAE Fittings Sensors
Johnson Controls Sensors
Kele Product Sensors
KMC Controls Sensors
Kromschroder Sensors
Laars Sensors
Leak Detector Sensors
Lennox Sensors
Liebert Sensors
MAMAC Systems Sensors
Marvair Sensors
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Mcdonnell Miller Sensors
Micronet Sensors
Mitsubishi Electric Sensors
Modine Sensors
Moen Sensors
Image for Navien Boilers & Water Heaters Navien Boilers & Water Heaters Sensors
Nortec Humidity Sensors
Oil Equipment Manufacturing Sensors
Packard Sensors
Panasonic Sensors
PRO 1 IAQ Sensors
Pro1Iaq Sensors
R.W. Beckett Sensors
Raypak Sensors
Resideo Sensors
Reznor Sensors
Rheem-Ruud Sensors
Rinnai Sensors
Scotsman Ice Machines Sensors
Siemens Building Technology Sensors
Siemens Combustion Sensors
Spartan Valves Sensors
Sporlan Controls Sensors
Sterling Sensors
System Sensor Sensors
Thermo Pride Furnaces Sensors
Water Heater Parts Sensors
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HVAC Humidity Sensor for Sale
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View Details HONEYWELL RESIDENTIAL Q3400A1024 HOT SURFACE PILOT IGNITER/SENSOR ASSY FOR SMARTVALVE PILOTS, 30" LEADS. HOT SURFACE PILOT BURNER. A LSO REPL'S Q3400A1008 AND Q3400A1032. | Midwest Supply Us
Q3400A1024 | HOT SURFACE PILOT IGNITER/SENSOR ASSY FOR SMARTVALVE PILOTS, 30" LEADS. HOT SURFACE PILOT BURNER. A LSO REPL'S Q3400A1008 AND Q3400A1032. | HONEYWELL RESIDENTIAL
Brand: HONEYWELL RESIDENTIAL
SKU: Q3400A1024
$97.13
 each
View Details HONEYWELL RESIDENTIAL THX321WFS3001W 24V T10+ WT WIFI Thermostat W/Remote Sensor 2H/2C Conventional 3H/2C Heat Pump Replaces THX321WFS2001W | Midwest Supply Us
THX321WFS3001W | 24V T10+ WT WIFI Thermostat W/Remote Sensor 2H/2C Conventional 3H/2C Heat Pump Replaces THX321WFS2001W | HONEYWELL RESIDENTIAL
Brand: HONEYWELL RESIDENTIAL
SKU: THX321WFS3001W
$307.97
 each
View Details RESIDEO WLD3CABLE Sensor Cable for Lyric Water Leak Detector | Midwest Supply Us
WLD3CABLE | Sensor Cable for Lyric Water Leak Detector | RESIDEO
Brand: RESIDEO
SKU: WLD3CABLE
$23.71
 each
View Details Resideo 50001464-004 Mounted Sensor 36" | Midwest Supply Us
50001464-004 | Mounted Sensor 36" | Resideo
Brand: Resideo
SKU: 50001464-004
$68.05
 each
View Details HONEYWELL RESIDENTIAL R8182H1070 Triple Aquastat Relay Intermittent Ign. 45 Sec. Ss Includes 5ft (1.5 m) armored Capillary with remote sensor | Midwest Supply Us
R8182H1070 | Triple Aquastat Relay Intermittent Ign. 45 Sec. Ss Includes 5ft (1.5 m) armored Capillary with remote sensor | HONEYWELL RESIDENTIAL
Brand: HONEYWELL RESIDENTIAL
SKU: R8182H1070
$1,173.76
 each
View Details Resideo TH115-AF-12VDC 7-DAY PROGRAMMABLE THERMOSTAT WITH FLOOR TEMPERATURE SENSOR. AMBIENT OR FLOOR CONTROL. 12VDC, MUST BE USED WITH CT230 LINKED UNITS. BACKLIT SCRE EN | Midwest Supply Us
TH115-AF-12VDC | 7-DAY PROGRAMMABLE THERMOSTAT WITH FLOOR TEMPERATURE SENSOR. AMBIENT OR FLOOR CONTROL. 12VDC, MUST BE USED WITH CT230 LINKED UNITS. BACKLIT SCRE EN | Resideo
Brand: Resideo
SKU: TH115-AF-12VDC
View Details
View Details Resideo TH115-AF-120S LOW VOLT 7-DAY PROGRAMMABLE THERMOSTAT WITH FLOOR TEMPERATURE SENSOR. AM BIENT OR FLOOR CONTROL. 16.7A 120V SP, BACKLIT SCREEN | Midwest Supply Us
TH115-AF-120S | LOW VOLT 7-DAY PROGRAMMABLE THERMOSTAT WITH FLOOR TEMPERATURE SENSOR. AM BIENT OR FLOOR CONTROL. 16.7A 120V SP, BACKLIT SCREEN | Resideo
Brand: Resideo
SKU: TH115-AF-120S
$127.07
 each
View Details Resideo TH115-AF-024T LOW VOLT 7-DAY PROGRAMMABLE THERMOSTAT WITH FLOOR TEMPERATURE SENSOR. AM BIENT OR FLOOR CONTROL. 0.5A , 24V, R,C,W. 15 MIN. CYCLES, BACKLIT SCREE N | Midwest Supply Us
TH115-AF-024T | LOW VOLT 7-DAY PROGRAMMABLE THERMOSTAT WITH FLOOR TEMPERATURE SENSOR. AM BIENT OR FLOOR CONTROL. 0.5A , 24V, R, C, W. 15 MIN. CYCLES, BACKLIT SCREE N | Resideo
Brand: Resideo
SKU: TH115-AF-024T
$143.49
 each
View Details Resideo W8735Y1000 WIRELESS SENSOR FOR OUTDOOR TEMPERATURE | Midwest Supply Us
W8735Y1000 | WIRELESS SENSOR FOR OUTDOOR TEMPERATURE | Resideo
Brand: Resideo
SKU: W8735Y1000
$350.77
 each
View Details Resideo Q3400A1016 HOT SURFACE PILOT IGNITER/SENSOR ASSY. REPLACEMENT FOR SMARTVALVE PILOTS, 24" LEADS. | Midwest Supply Us
Q3400A1016 | HOT SURFACE PILOT IGNITER/SENSOR ASSY. REPLACEMENT FOR SMARTVALVE PILOTS, 24" LEADS. | Resideo
Brand: Resideo
SKU: Q3400A1016
$96.48
 each
View Details Resideo 32004955-003 ELECTRONIC SENSOR. INTENDED FOR L7148. 24" LEAD LENGTH 18AWG, ONE 3/16" ,ONE 1/4" QUICK CONNECT. INCLUDES CAPTIVE RETAINING CLIP ON SENSOR. | Midwest Supply Us
32004955-003 | ELECTRONIC SENSOR. INTENDED FOR L7148. 24" LEAD LENGTH 18AWG, ONE 3/16" , ONE 1/4" QUICK CONNECT. INCLUDES CAPTIVE RETAINING CLIP ON SENSOR. | Resideo
Brand: Resideo
SKU: 32004955-003
$77.25
 each
View Details Resideo YTHX9421R7001WW PRESTIGE IAQ THERMOSTAT, EIM, OAS, RIG, AND DUCT SENSORS | Midwest Supply Us
YTHX9421R7001WW | PRESTIGE IAQ THERMOSTAT, EIM, OAS, RIG, AND DUCT SENSORS | Resideo
Brand: Resideo
SKU: YTHX9421R7001WW
$567.60
 each
View Details Resideo THX321WF2003W T10 RNC NO SENSORS | Midwest Supply Us
THX321WF2003W | T10 RNC NO SENSORS | Resideo
Brand: Resideo
SKU: THX321WF2003W
View Details
View Details Resideo Q3400A1032 HOT SURFACE PILOT IGNITER/SENSOR ASSY. REPLACEMENT FOR SMARTVALVE PILOTS, 30" LEADS. | Midwest Supply Us
Q3400A1032 | HOT SURFACE PILOT IGNITER/SENSOR ASSY. REPLACEMENT FOR SMARTVALVE PILOTS, 30" LEADS. | Resideo
Brand: Resideo
SKU: Q3400A1032
$117.76
 each
View Details Resideo C7835A1009 ENVIRACOM DISCHARGE AIR TEMPERATURE SENSOR FOR W8835 AND W8635 | Midwest Supply Us
C7835A1009 | ENVIRACOM DISCHARGE AIR TEMPERATURE SENSOR FOR W8835 AND W8635 | Resideo
Brand: Resideo
SKU: C7835A1009
$118.29
 each
View Details Resideo YTH6320R1001 WIRELESS FOCUSPRO KIT. A Y-PACK CONTAINING A WIRELESS FOCUSPRO 5-1-1 PROGRAMMABLE THERMOSTAT, EQUIPMENT INTERFACE MODULE AND RETURN AIR SENSOR. | Midwest Supply Us
YTH6320R1001 | WIRELESS FOCUSPRO KIT. A Y-PACK CONTAINING A WIRELESS FOCUSPRO 5-1-1 PROGRAMMABLE THERMOSTAT, EQUIPMENT INTERFACE MODULE AND RETURN AIR SENSOR. | Resideo
Brand: Resideo
SKU: YTH6320R1001
$376.45
 each
View Details HONEYWELL RESIDENTIAL HZ221K TRUEZONE KIT INCLUDES HZ221 ZONE PANEL, DISCHARGE AIR TEMPERATURE SENSOR, AND TRANSFORMER | Midwest Supply Us
HZ221K | TRUEZONE KIT INCLUDES HZ221 ZONE PANEL, DISCHARGE AIR TEMPERATURE SENSOR, AND TRANSFORMER | HONEYWELL RESIDENTIAL
Brand: HONEYWELL RESIDENTIAL
SKU: HZ221K
$246.17
 each
View Details Resideo YTHM5421R1010 EQUIPMENT INTERFACE MODULE KIT WITH 2 DUCT SENSORS. CONTROLS UP TO 4- ST AGES OF HEAT AND 2-STAGES OF COOL IN A HEAT PUMP SYSTEM AND UP TO 3- STA GES OF HEAT AND 2-STAGES OF COOL IN A CONVENTIONAL SYSTEM | Midwest Supply Us
YTHM5421R1010 | EQUIPMENT INTERFACE MODULE KIT WITH 2 DUCT SENSORS. CONTROLS UP TO 4- ST AGES OF HEAT AND 2-STAGES OF COOL IN A HEAT PUMP SYSTEM AND UP TO 3- STA GES OF HEAT AND 2-STAGES OF COOL IN A CONVENTIONAL SYSTEM | Resideo
Brand: Resideo
SKU: YTHM5421R1010
$122.92
 each
View Details Resideo YTH5320R1000 WIRELESS FOCUSPRO KIT. A Y-PACK CONTAINING A WIRELESS FOCUSPRO 5-1-1 PR OGRAMMABLE THERMOSTAT, EQUIPMENT INTERFACE MODULE AND RETURN AIR SENSOR. | Midwest Supply Us
YTH5320R1000 | WIRELESS FOCUSPRO KIT. A Y-PACK CONTAINING A WIRELESS FOCUSPRO 5-1-1 PR OGRAMMABLE THERMOSTAT, EQUIPMENT INTERFACE MODULE AND RETURN AIR SENSOR. | Resideo
Brand: Resideo
SKU: YTH5320R1000
$359.96
 each
View Details Resideo TH114-AF-024T LOW VOLT NON-PROGRAMMABLE THERMOSTAT WITH FLOOR TEMPERATURE SENSOR. AMBI ENT OR FLOOR CONTROL. 0.5A , 24V, R,C,W. 15 MIN. CYCLES, BACKLIT SCREEN | Midwest Supply Us
TH114-AF-024T | LOW VOLT NON-PROGRAMMABLE THERMOSTAT WITH FLOOR TEMPERATURE SENSOR. AMBI ENT OR FLOOR CONTROL. 0.5A , 24V, R, C, W. 15 MIN. CYCLES, BACKLIT SCREEN | Resideo
Brand: Resideo
SKU: TH114-AF-024T
$130.08
 each
View Details Resideo H6062A1000 HUMIDIPRO DIGITAL HUMIDITY CONTROL. HUMIDISTAT OR DEHUMIDISTAT. AUTOMATIC (WINDOW PROTECTION) OR MANUAL CONTROL. INCLUDES OUTDOOR SENSOR.TRADELINE. | Midwest Supply Us
H6062A1000 | HUMIDIPRO DIGITAL HUMIDITY CONTROL. HUMIDISTAT OR DEHUMIDISTAT. AUTOMATIC (WINDOW PROTECTION) OR MANUAL CONTROL. INCLUDES OUTDOOR SENSOR.TRADELINE. | Resideo
Brand: Resideo
SKU: H6062A1000
$103.45
 each
View Details Resideo VWS01Y-11/4 L5ActW1.25"BallVlvW/LeakSensor | Midwest Supply Us
VWS01Y-11/4 | L5ActW1.25"BallVlvW/LeakSensor | Resideo
Brand: Resideo
SKU: VWS01Y-11/4
$387.86
 each
View Details Resideo C7089R3013 Outdoor Temperature Sensor | Midwest Supply Us
C7089R3013 | Outdoor Temperature Sensor | Resideo
Brand: Resideo
SKU: C7089R3013
$113.43
 each
View Details HONEYWELL RESIDENTIAL C7189R3002-2 Indoor Air Sensor RL3.0 2 Pack Replaces C7189R2002-2 | Midwest Supply Us
C7189R3002-2 | Indoor Air Sensor RL3.0 2 Pack Replaces C7189R2002-2 | HONEYWELL RESIDENTIAL
Brand: HONEYWELL RESIDENTIAL
SKU: C7189R3002-2
View Details
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