Industrial Thermometers Therma 1, 3 & Elite

Buyer Rating: 4.9 out of 5 from 13 Reviews


Therma 1, 3 & Elite  industrial thermometers

  • Elite model includes backlight & max/min functions
  • FREE traceable certificate of calibration included
  • minimum 5 years battery life
  • 2 year guarantee
  • interchangeable thermocouple probes available
  • sold excluding probe


More details

in stock

£ 55.00 ex VAT

  £ 66.00 inc VAT

The Therma 1, 3 and Elite digital thermometers are rugged and easy to use instruments that operate through the range of -100 to 1370 °C with a 0.1 °C or 1 °C resolution (dependent on model - see specification table below). The thermometers are housed in a robust, lightweight ABS case that contains 'Biomaster' additive that helps to reduce bacterial growth. 

The Therma 1 and Therma 3 feature large, easy to read, LCD displays with open circuit 'Err' and low battery indication. Each thermometer is powered by three 1.5 volt AAA batteries that gives a minimum of five years battery life. The units will power off automatically after ten minutes, maximising battery life. This feature can be disabled by the user, if required.

ETI offers an extensive range of interchangeable thermocouple type K probes for a variety of different applications. The Therma 1, Therma 3 & Therma Elite are all sold excluding probe. To add recommended probes and other accessories select your choices from the 'Add Accessories' dropdowns, then click 'Buy Now! button.

For full details of the thermocouple type K probes available click here.

Therma Elite
The Therma Elite incorporates all the features of a Therma 1 thermometer, but with the addition of a backlit display, max/min memory function and a mode button for the selection of 0.1/1 °C/°F. The thermometer also incorporates a calibration trim function (±2 °C) which allows users to compensate for thermocouple probe errors.

optional accessories
The 830-251 protective silicone boot - the Therma series is splashproof to IP64 when used in conjunction with this protective boot. The 832-050 wall-mounted thermometer holder stores the thermometer safely when not in use (screws not supplied).


range 0.1°C:Therma 1/Elite: -99.9 to 299.9°C
range 1°C:Therma 1/Elite: 300 to 1372°C, Therma 3: -100 to 1372°C
resolution:Therma 1/Elite: 0.1°C & 1°C, Therma 3: 1°C
accuracy:Therma 1/Elite: ±0.4°C ±0.1%, Therma 3: ±1°C
battery:3 x 1.5 volt AAA
battery life:minimum 5 years (10000 hours)
sensor type:K thermocouple
display: 12mm LCD (Elite has backlight)
dimensions:25 x 56 x 128mm
weight:130 grams
case material: ABS plastic with Biomaster anti-bacterial additive
country of manufacture: United Kingdom
guarantee: two years
water/dust resistance: IP64 when using 820-253 boot
measurement scale: Celsius/Fahrenheit
certification: FREE traceable calibration certificate

Biomaster protection

Biomaster antimicrobial technology is incorporated in the majority ETI products during the manufacturing process, reducing the risk of bacterial cross contamination. As well as being harmful to health, outbreaks of food poisoning can damage brands, and the reputation of stores, food producers and restaurants. This protection lasts for the useful lifetime of the product.

The risk of food-borne contamination is widespread, existing in restaurants, bars, hotels, supermarkets, hospitals, schools, aircraft, cruise ships and your home. Anywhere where food is made, prepared or eaten.

Biomaster treated products have been proven to reduce the growth of food borne bacteria such as E.Coli, Salmonella and Campylobacter by up to 99.99%, so by choosing an ETI product with Biomaster additive, your product is protected 24 hours a day, every day.

What is Biomaster?

Biomaster is the leading brand of Antimicrobial Technology providing safe, effective and long-lasting protection against the growth of harmful bacteria, making any surface cleaner and more hygienic for its entire lifetime.

Proven to quickly reduce bacteria by up to 99.99% Biomaster is an effective means of reducing the growth of MRSA, E.Coli, Salmonella Campylobacter and Legionella and over 50 other species.

Incorporated into the body material of your ETI product, Biomaster becomes an integral part of it, providing durable, lifelong protection against the threat of cross contamination. 

How does it work?

The active ingredient in Biomaster is silver. Silver has been used in its pure form for many centuries to prevent the growth of bacteria.

Incredibly durable, long lasting and highly active, when Biomaster is added during manufacture it is dispersed throughout the product casing, will not wash off and will last for its entire lifetime. Biomaster provides antimicrobial protection without allowing bacteria to develop resistance.


Biomaster has 3 different modes of action:




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