ETI 231-022 Therma Dual-Channel Differential Thermometer

  • Dual type K inputs – compare two points instantly
  • Shows differential temperature – perfect for flow/return checks
  • Waterproof – rated IP66/67 for site conditions
  • Backlit screen – easy to read in low-light setups
  • Long battery life – up to 7500 hours on AAA batteries
  • Includes FREE traceable calibration certificate
£112.80 £94.00

Availability: In stock

Ships tomorrow if ordered in the next 21 hours and 5 minutes!

Product Code
ETI231-022

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ETI 231-022 Therma Dual-Channel Differential Thermometer

What is the ETI Therma Dual-Channel Thermometer?

The ETI Therma Dual-Channel Thermometer is a differential thermometer designed for professional electricians and HVAC engineers who need fast, reliable temperature measurements across two points. With dual type K thermocouple inputs and a wide temperature range up to 1372°C, it's ideal for electrical testing, fault finding and calibration work across industrial and commercial environments.

Whether you're testing pipe temperatures, checking heat exchangers or verifying system efficiency, this tool delivers clear, backlit readings, differential temperature calculations and long battery life all in a tough, waterproof case built for site conditions.

 

How does the Therma Dual-Channel stand out on site?

Unlike standard thermometers, the Therma Differential lets you monitor two temperatures at once, making it ideal for comparing supply and return lines or measuring across components without juggling multiple meters. Plus, it's compatible with most type K probes so you can use your preferred accessories without fuss.

Ideal for Professionals working on boilers, heating circuits, plant rooms and electrical systems who want reliable, traceable results.

 

Ready to upgrade your test kit?

If your current thermometer is limiting your diagnostics, the Therma Dual-Channel gives you flexibility, speed, and accuracy.

Order today to enjoy free delivery, expert support and our 90-day satisfaction guarantee. Need advice? Our team is here to assist you.

More Information
ManufacturerETI
Manufacturer Part Number231-022
GTIN5024368156068
document Manual (473.45 kB)
  • Temp range: -99.9°C to 1372°C
  • Sensor type: Type K thermocouple
  • Protection: IP66/67
  • Display: Backlit LCD
  • Battery: 3 x AAA, up to 7500 hours
  • Made in: United Kingdom
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Why choose Instrotech for your electrical test equipment?

With over 40 years’ experience supporting UK electricians, technicians and engineers, Instrotech is your trusted partner for quality tools and expert service. When you purchase from us, you benefit from:

  • Free UK shipping on all orders
  • Access to our knowledgeable technical support team
  • Available calibration services to maintain safety compliance
  • A 90-day money-back guarantee for complete peace of mind

We’re committed to helping you work safely and efficiently with industry-leading products and ongoing support.