Immersion Controller

TEMPRO

Immersion Controller

The Tempro Immersion Controller is designed to regulate & limit the temperature of liquids in a variety of applications, including water heaters, boilers, & other liquid-based heating systems where precise temperature control is required. Built for durability & performance, this controller helps maintain consistent operating conditions, protecting equipment & improving energy efficiency in both residential & commercial environments.

CUSTOM OPTIONS

A variety of custom options are available, including temperature ranges, sensing element lengths, & private branding, ensuring a tailored solution for your specific needs.

HIGH QUALITY

We take pride in quality control & reliable operation of our components. Each switch undergoes individual testing before leaving the factory, ensuring consistent performance & reliability.

CERTIFIED

Tempro products meet NEMA, UL, cUL, & N.E.C. 547 Ag-Ratings, ensuring they are built to withstand the demands of agricultural & outdoor applications.

STOCKED IN THE U.S.A.

Tempro products are designed & shipped from our facilities in Eau Claire, WI, reaching clients worldwide with reliable & efficient solutions.

View Products
view catalog
Product Detail Cross Reference Common Applications Frequently Asked Questions Request A Quote

Tempro Immersion Controllers are designed to regulate & limit the temperature of liquids in water heaters, boilers, & other systems requiring precise temperature control. These controllers support a wide range of heating applications by maintaining setpoint accuracy in environments where liquid temperature stability is critical.

Built to meet NEMA 1 enclosure standards, Tempro immersion controllers are suitable for indoor use where minimal protection from dust & moisture is required. A broad temperature range of 65°F to 240°F allows for flexibility across a wide variety of liquid temperature sensing applications, including hydronic systems, tanks, & industrial process equipment.

Product Features

  • Accurate temperature regulation
  • Designed for unit heat control, low limit, or circulator applications
  • Purple copper probes contain 99.5% pure copper for excellent conductivity
  • Max pressure rating: 10 Bar (1000 kPa)
  • Max ambient temperature: 175°F
  • Universal replacement option
  • Temperature scale & external adjustment screw for easy calibration
  • Liquid-filled element responds rapidly to temperature changes
  • Remote bulb models available for air sensing in ducts & outdoor environments
  • Private labeling available – contact us for details

Product Specifications

  • Vertical or horizontal mounting options
  • 65°F to 240°F temperature range
  • 6°F differential
  • Available with capillary, immersion well, & surface sensing bulbs
  • Manual & auto reset options
  • Snap-acting microswitches enclosed to operate on temperature rise to setpoint
  • SPST or SPDT configurations
  • Voltage range: 24VAC to 600VAC
  • Amperage: 16A / 22A
  • Durable steel housing
  • NEMA 1 rated
  • Dual Fahrenheit & Celsius temperature scales included on all models


View Datasheet

Cross Reference

We’re confident in the performance of our Immersion Controller, which is why we’ve compared it to other leading products in the market. With its wide temperature range, responsive liquid-filled sensor, & universal mounting options, the Tempro controller delivers reliable results across a range of liquid temperature control applications.

For a side-by-side look at how the Tempro Immersion Controller compares to competing models, view our cross-reference guide here.

BRANDS

Tempro

TP Series

Honeywell

L400/L600 Series

Emerson

1100 Series

Johnson Controls

A19 Series

High Limit, Low Limit & Circulator Control
65°F to 240°F Adjustable Temperature Range
6°F Fixed Differential
16 Amps @ 120VAC
Remote, Immersion or Direct Sensor
Horizontal or Vertical Mounting
SPDT & SPST
Auto & Manual Reset
NEMA 1 Rated
UL Listed
Direct from Manufacturer

Common Applications

The Tempro Immersion Controller is suitable for use in water heaters, boilers, & other HVAC applications that require consistent & accurate temperature regulation of liquids.

HVAC Temperature Limit & Control
READ MORE

Frequently Asked Questions

Your questions, answered.

How do I install the immersion controller into my unit?

Depending on the application, there are a number of ways to wire the immersion controller properly. Click here to download the instruction manual.

How to adjust the desired temperature setpoint?

Using a screwdriver, turn the dial on the front plate of the controller to the desired setpoint.

How do I change from Fahrenheit to Celsius?

The controller comes with the Fahrenheit temperature scale already installed. Each units comes with a Celsius scale in the controllers’ box. Simply remove the cover of the controller and switch out the Fahrenheit scale with the Celsius scale.

What’s the difference between an immersion controller and a line voltage thermostat?

An immersion controller is designed to sense temperatures of liquids/fluids inside equipment such as a boiler, hot water heater, etc. Whereas, a line voltage thermostat is designed to sense air temperature to control a fan, heater, louver, etc. to control the environments’ temperature. However, an immersion controller can also sense air temperature to regulate a fan, heater, louver etc. much like a line voltage thermostat, but it must be a remote sensing bulb model to actuate accurately.

Does Tempro’s immersion controllers come with an immersion well for the equipment’s tank?

No, the Tempro immersion controller does not come with an immersion well, though most boiler and hot water heaters will already have one installed that the bulb can already be fitted to. Additionally, our STEMCO division at Senasys does provide immersion wells (thermowells). So if needed, contact us!

I’m currently using a model from a different manufacturer. Will yours work?

Most likely! Check out our cross reference page here.

Can I customize the immersion controller to meet my application requirements?

Yes! Contact our direct technical support team with your application requirements here .

Request A Quote

Send our team your product specifications and/or application details below. One of our direct technical support team members will follow up within 1-2 business days.

    Your Email Sign up to receive email newsletters and marketing materials. (required)