Industrial thermometers

Robust, purpose-built thermometers for measuring liquids, surfaces and air temperatures for manufacturing, HVAC and facilities management.

Industrial thermometers

ETI’s range of industrial thermometers is built to ensure easy, accurate and reliable temperature measurements for compliance and quality checks.

Popular options include the Therma Range — ETI’s collection of robust, UK-made thermocouple-type K thermometers that can be paired with a variety of probes for different checks.

Alongside this, we offer room thermometers for facilities management, water kits for Legionella compliance, anti-corrosive thermometers for harsh environments, and more.

All of our UK-made thermometers come with a 2-year guarantee and a free traceable calibration certificate.

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CaterTemp® Durable Metal Thermometer

ETI Industrial Thermometers for Reliable Measurements

Accurate temperature measurement is essential across industrial environments, from manufacturing and warehousing to HVAC and facilities management. Whether you need a simple thermometer for routine checks or a robust and waterproof instrument for demanding environments, we have an instrument designed for your application. 

Multi-Function Thermometer - Digital Catering Thermometer

Why accurate temperature measurement matters

Maintaining product quality

Consistent temperature control helps ensure products are made, stored, and handled correctly. Accurate readings reduce errors and help maintain a reliable end product.

Meeting compliance and standards

Many industries require temperature checks as part of quality and safety processes. Using calibrated, traceable thermometers helps you stay compliant and prepared for inspections.

Protecting equipment and processes

Temperatures that are too high or too low can affect equipment performance and disrupt operations. Reliable measurement helps spot issues early and keep things running smoothly.

Reducing waste and inefficiency

Inaccurate readings can lead to wasted materials and unnecessary costs. Precise temperature control helps improve efficiency and minimise waste.

Reliable Industrial Thermometers

Designed for industrial applications, built to deliver accurate readings that last. The range includes:

HVAC thermometers

Thermocouple type K instruments and differential thermometers for measuring air temperatures, pipes and radiators. 

Water thermometers

Complete kits for Legionella risk assessments and waterproof thermometers for measuring liquids. 

Room thermometers

Therma hygrometers for measuring room temperature and humidity in buildings, warehouses, schools, hospitals and offices. 

Manufacturing thermometers

Robust thermocouple thermometers for measuring liquids, semi-solids, ovens and surfaces in manufacturing environments. 

Frequently Asked Questions

Which thermometer is best for measuring surfaces?

The best thermometer for surfaces is a thermocouple thermometer, such as the Therma 1, Therma 3, Therma Elite or Therma Waterproof, plus a surface probe.

We offer a wide range of surface probes to suit the surface you’re measuring, including pipe probes, grill probes, and magnetic probes.

Infrared thermometers are less accurate than surface probes but are good for quick measurements of very hot or hard-to-reach areas.

Which thermometer is best for Legionella risk assessments?

ETI offers a range of thermometer kits which contain everything you need for Legionella compliance, including thermocouple thermometers and a variety of probes for water and surfaces.

Explore the Legionella range.

Which thermometer is best for harsh environments?

The Therma Metal K Metal is best suited to harsh environments as it features a rugged, anti-corrosive aluminium case. It’s also fully waterproof to IP67.

Do industrial thermometers need calibrating?

Yes, industrial thermometers need regular calibration checks to ensure they stay accurate.

For thermocouple thermometers, check your instrument’s accuracy using a MicroCal calibrator. For probes, use an ice bath test, dry-well calibrator, or water bath.

If your readings have fallen outside of the instrument's specified accuracy, you can return it to our UKAS laboratory for recalibration.

Explore calibration equipment.

How to choose an industrial thermometer?

When selecting a thermometer for your industrial application, some common features to consider are:

  • Waterproofness — protection from water and dust
  • Range — the highest and lowest temperatures required
  • Accuracy — the potential margin for error
  • Hold — locking readings on-screen for easy recording
  • Max/min — the maximum and minimum temperatures over a period

How accurate should an industrial thermometer be?

Accuracy requirements vary, but many industrial applications require readings within ±0.5 °C to ±1 °C. More critical processes may demand higher precision.