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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 Image for Armstrong International Armstrong International Sensors Bacharach Sensors Baltimore Parts Sensors Image for BAPI BAPI Sensors Barber Colman Sensors Bard HVAC Sensors Image for Belimo Belimo Sensors Bell Gossett Sensors Bosch Sensors Bradford White Sensors Broan Fans Sensors BROAN-NuTone Sensors Buderus Sensors Burnham Boilers Sensors Carlin Sensors Carlyle Sensors Carrier Sensors Chicago Faucet Co Sensors ClimateMaster Sensors Copeland 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 Laars Sensors Leak Detector Sensors Maxitrol Sensors Mcdonnell Miller Sensors Micronet Sensors Modine Sensors Moen Sensors Image for Navien Boilers & Water Heaters Navien Boilers & Water Heaters Sensors Oil Equipment Manufacturing Sensors Panasonic Sensors Pro1Iaq Sensors R.W. Beckett Sensors Raypak Sensors Resideo Sensors Reznor Sensors Rinnai Sensors Sterling Sensors Thermo Pride Furnaces Sensors Water Heater Parts Sensors Weil Mclain Sensors York Sensors

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HVAC Humidity Sensor for Sale
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View Details HONEYWELL RESIDENTIAL YCHW3000W3003 L1 WiFi Water Leak and Freeze Detector and Sensor Cable 3 Pack | Midwest Supply Us
YCHW3000W3003 | L1 WiFi Water Leak and Freeze Detector and Sensor Cable 3 Pack | HONEYWELL RESIDENTIAL
Brand: HONEYWELL RESIDENTIAL
SKU: YCHW3000W3003
View Details
View Details HONEYWELL RESIDENTIAL WLD3CABLE WIFI Water Leak Detector Accessory Cable Sensor 5' | Midwest Supply Us
WLD3CABLE | WIFI Water Leak Detector Accessory Cable Sensor 5' | HONEYWELL RESIDENTIAL
Brand: HONEYWELL RESIDENTIAL
SKU: WLD3CABLE
View Details
View Details HONEYWELL RESIDENTIAL C7089R3013 Outdoor Air Sensor 3.0 | Midwest Supply Us
C7089R3013 | Outdoor Air Sensor 3.0 | HONEYWELL RESIDENTIAL
Brand: HONEYWELL RESIDENTIAL
SKU: C7089R3013
View Details
View Details HONEYWELL RESIDENTIAL AC112-01 Floor Temperature Sensor 15' Cable 10 K OHM @ 77F | Midwest Supply Us
AC112-01 | Floor Temperature Sensor 15' Cable 10 K OHM @ 77F | HONEYWELL RESIDENTIAL
Brand: HONEYWELL RESIDENTIAL
SKU: AC112-01
$22.85 each
View Details HONEYWELL RESIDENTIAL TWLD3005-001 L2 WIFI Water Sensor And Switch | Midwest Supply Us
TWLD3005-001 | L2 WIFI Water Sensor And Switch | HONEYWELL RESIDENTIAL
Brand: HONEYWELL RESIDENTIAL
SKU: TWLD3005-001
View Details
View Details HONEYWELL RESIDENTIAL THX321WF3003W 24V T10+ WT WIFI Thermostat W/O Remote sensor 2H/2C Conventional 3H/2C Heat Pump | Midwest Supply Us
THX321WF3003W | 24V T10+ WT WIFI Thermostat W/O Remote sensor 2H/2C Conventional 3H/2C Heat Pump | HONEYWELL RESIDENTIAL
Brand: HONEYWELL RESIDENTIAL
SKU: THX321WF3003W
$269.47 each
View Details Resideo THX321WFS3001W T10 ProSmartStat w/RedlkSensor | Midwest Supply Us
THX321WFS3001W | T10 ProSmartStat w/RedlkSensor | Resideo
Brand: Resideo
SKU: THX321WFS3001W
$311.67 each
View Details Resideo C7189R3002-2 RedLinkWirelessRoomSensor 2PK | Midwest Supply Us
C7189R3002-2 | RedLinkWirelessRoomSensor 2PK | Resideo
Brand: Resideo
SKU: C7189R3002-2
$119.07 each
View Details Resideo 198799Z OUTDOOR OR SUPPLY SENSOR FOR AQ475, AQ675, OR AQ775 | Midwest Supply Us
198799Z | OUTDOOR OR SUPPLY SENSOR FOR AQ475, AQ675, OR AQ775 | Resideo
Brand: Resideo
SKU: 198799Z
$68.96 each
View Details HONEYWELL RESIDENTIAL YTHX9421R5085WW Prestige 2-Wire IAQ Kit With Redlink Technology. Residential Or Commercial Use. 7 Day Programmable. Up To 4H/2C Heat Pump Or Up To 3H/2C Conventional. W/ THM5421R1021 & 2 Duct Sensors | Midwest Supply Us
YTHX9421R5085WW | Prestige 2-Wire IAQ Kit With Redlink Technology. Residential Or Commercial Use. 7 Day Programmable. Up To 4H/2C Heat Pump Or Up To 3H/2C Conventional. W/ THM5421R1021 & 2 Duct Sensors | HONEYWELL RESIDENTIAL
Brand: HONEYWELL RESIDENTIAL
SKU: YTHX9421R5085WW
$449.49 each
View Details HONEYWELL RESIDENTIAL YTH5320R1000 24v Wireless Focuspro Thermostat Kit - Non Programmable with Redlink. Up To 3H/2C Heat Pump Or Up To 2H/2C Conventional. Includes Wireless Thermostat Equipment Interface Module And Return Air Sensor. | Midwest Supply Us
YTH5320R1000 | 24v Wireless Focuspro Thermostat Kit - Non Programmable with Redlink. Up To 3H/2C Heat Pump Or Up To 2H/2C Conventional. Includes Wireless Thermostat Equipment Interface Module And Return Air Sensor. | HONEYWELL RESIDENTIAL
Brand: HONEYWELL RESIDENTIAL
SKU: YTH5320R1000
$355.70 each
View Details HONEYWELL RESIDENTIAL Q354A1018 6" Flame Sensor/ Flame Rod For Use With S87CDK S89EF | Midwest Supply Us
Q354A1018 | 6" Flame Sensor/ Flame Rod For Use With S87CDK S89EF | HONEYWELL RESIDENTIAL
Brand: HONEYWELL RESIDENTIAL
SKU: Q354A1018
View Details
View Details HONEYWELL RESIDENTIAL 50001464-001 Sensor Assembly For L7224 & L7248 12" | Midwest Supply Us
50001464-001 | Sensor Assembly For L7224 & L7248 12" | HONEYWELL RESIDENTIAL
Brand: HONEYWELL RESIDENTIAL
SKU: 50001464-001
$55.84 each
View Details RESIDEO 32004955-003/U Sensor Assembly 24 Inch Lead for Series L71XX Electronic Aquastats | Midwest Supply Us
32004955-003/U | Sensor Assembly 24 Inch Lead for Series L71XX Electronic Aquastats | RESIDEO
Brand: RESIDEO
SKU: 32004955-003/U
$75.74 each
View Details RESIDEO Q3400A1016/U Pilot Hot Surface Sensor Assembly 24 Inch Lead | Midwest Supply Us
Q3400A1016/U | Pilot Hot Surface Sensor Assembly 24 Inch Lead | RESIDEO
Brand: RESIDEO
SKU: Q3400A1016/U
$97.57 each
View Details RESIDEO Q347A1004/U Flame Sensor for S87C/D/K S89E/F and Q354A Bracket Style D | Midwest Supply Us
Q347A1004/U | Flame Sensor for S87C/D/K S89E/F and Q354A Bracket Style D | RESIDEO
Brand: RESIDEO
SKU: Q347A1004/U
$61.65 each
View Details RESIDEO Q354A1018/U Flame Sensor Electronic with 6 Inch Rod | Midwest Supply Us
Q354A1018/U | Flame Sensor Electronic with 6 Inch Rod | RESIDEO
Brand: RESIDEO
SKU: Q354A1018/U
$106.10 each
View Details RESIDEO W8735Y1000/U Module Kit Wireless Outdoor Reset Alarm for L7224/L7248 Outdoor Sensor | Midwest Supply Us
W8735Y1000/U | Module Kit Wireless Outdoor Reset Alarm for L7224/L7248 Outdoor Sensor | RESIDEO
Brand: RESIDEO
SKU: W8735Y1000/U
$423.62 each
View Details RESIDEO 392431/U Sensor Assembly Igniter for Y8610 for Pilot Hardware | Midwest Supply Us
392431/U | Sensor Assembly Igniter for Y8610 for Pilot Hardware | RESIDEO
Brand: RESIDEO
SKU: 392431/U
$163.95 each
View Details RESIDEO L8100B1128/U Aquastat High Limit Electric with Sensor 100-180 Degrees Fahrenheit Controller 5DEG F Fixed Energy Cut Off Switch 20DEG F Fixed Immersion Well | Midwest Supply Us
L8100B1128/U | Aquastat High Limit Electric with Sensor 100-180 Degrees Fahrenheit Controller 5DEG F Fixed Energy Cut Off Switch 20DEG F Fixed Immersion Well | RESIDEO
Brand: RESIDEO
SKU: L8100B1128/U
$482.16 each
View Details Resideo WLD3CABLE AssyCableSensorForLyricDetectr | Midwest Supply Us
WLD3CABLE | AssyCableSensorForLyricDetectr | Resideo
Brand: Resideo
SKU: WLD3CABLE
$23.55 each
View Details Resideo 50001464-005 Flush-mounted sensor 48" | Midwest Supply Us
50001464-005 | Flush-mounted sensor 48" | Resideo
Brand: Resideo
SKU: 50001464-005
$56.28 each
View Details Resideo Q354A1018 DIRECT IGNITION SENSOR. 6.37 IN LONG. STRAIGHT. | Midwest Supply Us
Q354A1018 | DIRECT IGNITION SENSOR. 6.37 IN LONG. STRAIGHT. | Resideo
Brand: Resideo
SKU: Q354A1018
$66.66 each
View Details HONEYWELL RESIDENTIAL H6062A1000 24v Premier White HumidPro Digital Humidity/Dehumidity Control Wall Or Duct Mount Includes Outdoor Sensor Manual Mode: 10% to 90% RH% (Adjustable) Auto Mode: 10% to 60% RH% (35% Default) Replaces H600 | Midwest Supply Us
H6062A1000 | 24v Premier White HumidPro Digital Humidity/Dehumidity Control Wall Or Duct Mount Includes Outdoor Sensor Manual Mode: 10% to 90% RH% (Adjustable) Auto Mode: 10% to 60% RH% (35% Default) Replaces H600 | HONEYWELL RESIDENTIAL
Brand: HONEYWELL RESIDENTIAL
SKU: H6062A1000
$102.21 each
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