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Elmwood Sensors / Honeywell

Honeywell Sensors Elmwood is a key global supplier of sensors and controls used in the medical, office automation, aerospace, HVAC, automotive and heavy truck, off-road vehicle, and consumer appliance industries. Elmwood’s products include sensors for temperature, position, speed, and pressure; thermostats; flexible heaters; electronic control valves; pressure switches.

Elmwood was acquired by Honeywell. Honeywell serves customers worldwide in the aviation, information technology, industrial, automotive on-board, and consumer appliance industries. Honeywell offers a wide range of sensors for diverse measurands, including silicon micromachined pressure sensors; RTD and silicon-based RTD temperature sensors; capacitive relative humidity sensors with integrated electronics; Hall effect and magnetoresistive sensors; current sensors; force sensors; air flow sensors; and solid-state pH electrodes. For innovation that’s set well apart, there is only Honeywell Sensing and Productivity Solutions (formerly Honeywell Sensing and Control). With more than 50,000 products ranging from snap action, limit, toggle and pressure switches to position, speed, pressure, torque and airflow sensors, Honeywell Sensing and Productivity Solutions has a product to meet any industry’s needs, any company’s needs. Honeywell Sensing and Productivity Solutions brings to bear engineering expertise and value-added capabilities no other company offers.

Bi-metal, Snap Switch, and Snap Action Thermostats

Honeywell Elmwood

Honeywell Sensing and Control, formerly Elmwood Thermostats, lines of precision and commercial snap action thermostats.

Snap Action thermostat

Redi-Temp® Thermostats: a line of standard Elmwood thermostat products offered in a range of pre-set temperatures.


  • Redi-Temp Subminiature 3600 Series Thermostats in a TO-5 Package
  • Redi-Temp Series 3100 SPST Hermetic Series
  • Redi-Temp 3455 RC 15 A High Temperature Series

Precision Thermostats

Hermetic and non-hermetic devices for use in dispensing equipment, scientific instruments, aircraft, radar equipment, medical equipment and electronic control systems. Also available are custom-packaged thermostats for application flexibility and industrial-grade thermostats designed to operate in extreme environmental conditions.


  • 3100
  • 3106
  • 3150
  • 3156
  • 3000
  • 3001/3004
  • 3450, 3455R & 3455RBV
  • 3450RC & 3455RC
  • 3455RM & 3450CM

Commercial Thermostats

For use in a wide array of appliances, automotive applications, office machines, heat and smoke detectors and HVAC equipment. Snap action thermostats include automatic or manual reset options, phenolic or ceramic housings, and a variety of mounting brackets and terminal options. Commercial

  • 2450R, 2450HR, 2455R
  • 2450RC, 2450RCH, 2455RC
  • 2455RM, 2450CM
  • 2455RBV
  • 2450A, 2455RA
  • 2450R, 2455R, 2450RC, 2455RC