Therma 3 with FREE type K probe - save £27.50


brand: ETI


Therma 3 industrial thermometer with FREE type K penetration probe.

  • FREE traceable calibration certificate
  • wide temperature range
  • 5 years minimum battery life
  • FREE probe  - saves you £27.50


More details

in stock

Buyer Rating: 4 out of 5 from 1 Reviews

£40.00 ex VAT

£48.00 inc VAT


£67.50 ex VAT

The Therma 3 digital thermometer is a rugged and easy to use instrument that operate through the range of -100 to 1370 °C with a 1 °C resolution. The thermometer is housed in a robust ABS case that contains 'Biomaster' additive that helps to reduce bacterial growth. 


The Therma 3 features a large, easy to read, LCD display with open circuit 'Err' and low battery indication. Each thermometer is powered by three 1.5 volt AAA batteries that give a minimum of five years battery life. The unit will power off automatically after ten minutes, maximising battery life. This feature can be disabled by the user, if required. For this time limited offer ETI will include a FREE type K penetration probe with your purchase. Equivalent to a saving of £27.50 on normal price!



optional accessories

The 830-251 protective silicone boot - the Therma series is waterproof to IP63 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:-100 to 1372°C
accuracy:±1°C ±0.1%
battery:3 x 1.5 volt AAA
battery life:minimum 5 years (10000 hours)
sensor type:K thermocouple
display: 12mm LCD
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
certification: FREE traceable calibration certificate
  • order code: 836-020
    £28.80 inc VAT

    in stock

    Mini probe wipes - QAC free x 10 tubs (700)wipes measure 70 x 130mm convenient and easy to use anti-bacterial effective against listeria and salmonella

    £28.80 inc VAT

    in stock
  • order code: 830-221
    £7.20 inc VAT

    in stock

    Protective rubber boot for Therma series, and other new style ETI thermometers.protects against accidental damage made from durable silicone Fits wide range of ETI thermometers

    £7.20 inc VAT

    in stock
  • order code: 830-005
    £6.00 inc VAT

    in stock

    Protective zip pouch for new style Therma series, CaterTemp®, Precision and Reference thermometers and ETI Moisture and Damp meters with fixed sensors.  soft PVC fabric 46 x 80 x 180mm protects your thermometer

    £6.00 inc VAT

    in stock
  • order code: 832-053
    £14.40 inc VAT

    in production - backorder only

    stainless steel wall bracket and black silicone boot stores your thermometer safely easy wall hanging black boot provides added protection in use

    £14.40 inc VAT

    in production - backorder only

Biomaster protection

Biomaster antimicrobial technology is incorporated in the majority ETI products during the manufacturing process, ensuring lifelong protection against 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.

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, you are protected 24 hours a day, every day.

What is Biomaster?

Biomaster Antimicrobial Technology is the leading range of safe, effective and permanent additives for the control 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, 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:

Silver ions bind to the cell surface;
This disrupts the cell and prevents cell growth.

The silver ions are attracted to the Thiol groups in the cell enzymes;
This prevents the bacterium producing energy.

Silver ions interrupt the cell DNA;
This prevents DNA replication and new cell formation.


The Biomaster 3 stage mode of action does not allow bacteria cells to develop resistance, making Biomaster future proof and highly resistant against antibiotic resistant species such as MRSA.



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