sensors

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.

All Manufacturers

View Details BAPI BA/BS4MBF-C-H2-F1-J Modbus BAPI-Stat 4MB Temperature and Humidity Sensor  | Midwest Supply Us
$113.40 each
View Details NAVIEN TANKLESS WATER HEATERS 30024866A FLOW SENSOR  | Midwest Supply Us
30024866A | FLOW SENSOR | NAVIEN TANKLESS WATER HEATERS
Brand: NAVIEN TANKLESS WATER HEATERS
SKU: 30024866A
$52.44 each
View Details MAMAC Systems VA-921-VDC-8 HUMIDITY SENSOR  | Midwest Supply Us
VA-921-VDC-8 | HUMIDITY SENSOR | MAMAC Systems
Brand: MAMAC Systems
SKU: VA-921-VDC-8
$188.76 each
View Details GREE 3900031302 INDOOR TEMP SENSOR  | Midwest Supply Us
3900031302 | INDOOR TEMP SENSOR | GREE
Brand: GREE
SKU: 3900031302
$33.33 each
View Details BAPI BA/WSK Weather Shade Kit for Outside Air Sensors  | Midwest Supply Us
$60.75 each
View Details Eclipse 13312-5 Flame Sensor 3" Rod  | Midwest Supply Us
13312-5 | Flame Sensor 3" Rod | Eclipse
Brand: Eclipse
SKU: 13312-5
$353.50 each
View Details Carrier ZS2PCAR ZS2 PRO TEMP SENSOR w/LCD DISP  | Midwest Supply Us
$214.58 each
View Details Bosch 87072064590 Temperature Sensor Greentherm Exhaust Back Flow  | Midwest Supply Us
$66.68 each
View Details MAMAC Systems HU-921-5-VDC-12 HUMIDITY/ TEMPERATURE SENSORE  | Midwest Supply Us
HU-921-5-VDC-12 | HUMIDITY/ TEMPERATURE SENSORE | MAMAC Systems
Brand: MAMAC Systems
SKU: HU-921-5-VDC-12
$188.76 each
View Details Indeeco 1003019 SENSOR  | Midwest Supply Us
1003019 | SENSOR | Indeeco
Brand: Indeeco
SKU: 1003019
$599.90 each
View Details BAPI BA/T1K[-40 TO 185F]-O-BB2 Outside Air Temperature Transmitter  | Midwest Supply Us
$55.49 each
View Details Trane BAYSENS924B TOUCH SCREEN PROG ZONE SENSOR  | Midwest Supply Us
$93.53 each
View Details AERCO Boiler and Water Heater 123449 Exhaust Temperature Sensor  | Midwest Supply Us
123449 | Exhaust Temperature Sensor | AERCO Boiler and Water Heater
Brand: AERCO Boiler and Water Heater
SKU: 123449
$179.25 each
View Details Buderus 8718600019 Pressure Sensor Water for GB142 Series  | Midwest Supply Us
$138.84 each
View Details BAPI BA/BS4MBF-C-HN-F1-J Modbus BAPI-Stat 4MB Temperature Sensor  | Midwest Supply Us
$52.65 each
View Details Trane SEN02907 SENSOR; COIL, 5/16 CLIP, 54"  | Midwest Supply Us
$28.66 each
View Details Laars Heating Systems E2366900 10K/20K OUTLET SENSOR  | Midwest Supply Us
E2366900 | 10K/20K OUTLET SENSOR | Laars Heating Systems
Brand: Laars Heating Systems
SKU: E2366900
$113.38 each

Sensors measure physical conditions like humidity, light, sound, and temperature. They can be made from various materials, but most have both a detecting and an output or display component.

How Sensors Work

Sensors detect and respond to physical environment inputs such as light, heat, motion, moisture, pressure, or other environmental phenomena. Generally, the output is a signal converted to a readable display at the sensor location or transmitted electronically over a network for reading or further processing.

What Makes a Good Sensor?

It is critical to consider temperature, size, protection class, and whether the sensor requires digital or analog input. Other qualities to look out for include affordability, low installation costs, and low maintenance. That's why we stock first-rate Bapi, Bellimo, and Jergens Sensors.

What Types of Sensor Do We Provide?

At Midwest Supply, we have a range of rooftop, wall mount, and vertical mount sensors, including accessories, to meet your residential and commercial needs. Our sensors’ average length is between 10ft-20ft with temperature ranges from 13-30°C and 55-85°F.

Midwest Supply’s current line includes:

  • Duct Sensors
  • Outside Sensors
  • Pressure Sensors
  • Room Sensors
  • Gas Sensors
  • Strap Sensors
  • Bullet Sensors

More About Bacnet® and Modbus Communication

Bacnet® and Modbus refer to standard network communication protocols.

BACnet®, short for "Building Automation Control Network", is a data communication protocol for building automation and control networks that utilize the ASHRAE, ANSI, and ISO 16484-5 standards protocol. It's used for multiple devices to communicate across building automation systems by system users and building system manufacturers.

Modbus is one of the oldest protocols for devices to communicate their data digitally to a central controller. While it is best suited for industrial applications, its simplicity also makes it useful for building automation.

Our friendly and knowledgeable customer service staff can help you find a suitable sensor for your system if you are still deciding what to buy.

Committed to customer satisfaction
as experts in Sensors