Honeywell T675 Remote Bulb Thermostats for Boiler Temperature Control

Honeywell remote bulb thermostats regulate the temperature of air or liquids in ducts, pipes, tanks, and boilers. They can also be used to control dampers and valves in heating systems.

Key Specifications

  • Suitable for applications where the controller must be placed outside the sensing area
  • Ambient temperature compensation for good temperature control
  • Adjustable temperature differential
  • Has two wiring knockouts for 1/2" conduit, can be mounted in any position
  • UL, CSA approved

Specifications, Manuals, and Supporting Literature

Click the file icon to view the file online, or right-click on the file icon and select "Save Target As..." to download the file to your computer for later viewing.
Tip: If you want to print a large file, download it to your PC first.

Model Selection Guide

Use this table to find the right model for your application.  Don't see the option you need? Call a Lesman sales specialist at 800-953-7626

Models Available to Buy Online at
If the model you need isn't listed here, call Lesman at 800-953-7626.
Remote bulb thermostat. Copper bulb sensing element. One
SPDT relay output. Setpoint range 55° to 175°F. 20 foot capillary


See our full combustion safety and efficiency instrumentation offering.

Flame safeguard systems
Flame safeguard systems
Plug-in modules
Keyboards, purge timer cards,
and annunciator panels
Flame detectors
Flame detectors
Flame amplifiers
Flame signal amplifiers
Pressure controls
Pressure controls
Temperature controls
Temperature controls
valves and motors
Shutoff valves, control valves,
and actuators
combustion efficiency analyzers
Combustion efficiency and
emissions analyzers



Subscribe to the Lesman Instrument Company YouTube channel.Lesman Instrument Company on YouTube

Video is a great way to learn about instruments and technology, and it's available whenever you need it. Watch step-by-step instructions on how to configure a transmitter, tune a controller, or troubleshoot a safety valve. We'll post videos we create, and those our manufacturer partners share with us, so you don't have to look in multiple places to find the video training you need.

Subscribe to Lesman's YouTube channel, and you'll get email notifications as soon as we add new training videos and webinars.