Therma 22 Plus waterproof thermometer for food processing View larger

Therma 22 Plus waterproof thermometer for food processing

brand: ETI


Therma 22 Plus waterproof IP66/67 thermocouple & thermistor thermometer.

  • accepts type both T thermocouple & thermistor probes
  • FREE traceable certificate of calibration included
  • UKAS 3 point certificate available (+£44)
  • robust waterproof case
  • backlight, max/min & hold functions
  • excludes probe

More details

in stock

Two year guarantee Hold Auto-off HACCP Made in UK Max-Min Lumberg connector IP66-67

£85.00 ex VAT

£102.00 inc VAT

The Therma 22 Plus incorporates an easy to use waterproof Lumberg screw-locking type connector, allowing a wide range of interchangeable type T thermocouple and thermistor probes to be used.

The Therma 22 Plus waterproof thermometer offers IP66/67 protection and is housed in a robust waterproof white ABS case. The thermometer utilises state of the art electronic circuitry, designed for reliability and ease of use and can be submerged or washed under a running tap - ideal for food processing applications where cleaning is paramount.

The Therma 22 Plus measures temperature over the range of -199.9 to 400 °C with a 0.1 °C resolution, auto-ranging to 1 °C resolution over the range of 300 to 400 °C.

The Therma 22 Plus features a large easy to read, LCD display with max/min, °C/°F, hold, open circuit, low battery indication and an optional backlight. The unit also incorporates an auto-power off facility that automatically turns the instrument off after ten minutes, maximising battery life.

The instrument is housed in an ergonomic, ABS case that includes 'Biomaster' additive which reduces bacterial growth. Each unit has an integrated rubber seal to ensure complete water resistance and helps to reduce the possibility of damage in harsh environments.

Add a probe:

Therma 20 pentration probe
Penetration Probe
Therma 22 Plus penetration probe. Ideal for liquids
Waterproof Plug Mounted Penetration Probe
Waterproof Plug Mounted Probe
Waterproof Plug Mounted Penetration Probe
fast response penetration probe
NTC Thermistor Waterproof Probe
Waterproof NTC thermistor penetration probe



  • range - T thermocouple: -199.9 to 400°C

  • range - thermistor: -39.9 to 149.9°C

  • resolution: 0.1°C to 300 °C thereafter 1 °C

  • accuracy - instrument only : ±0.2°C

  • system accuracy - type T t/c: ±0.5°C (-50 to 150 °C)

  • system accuracy - thermistor: ±0.4°C (-25 to 110°C)

  • battery: 3 x 1.5 volt AAA

  • battery life: minimum 5 years (10000 hours)

  • sensor type: thermistor/type T thermocouple

  • display: 15mm LCD

  • backlight: Yes

  • dimensions: 32 x 71 x 141mm

  • weight: 220 grams

  • case material: ABS plastic with Biomaster anti-bacterial additive

  • country of manufacture: United Kingdom

  • guarantee: two years

  • water/dust resistance: IP66/67 protection

  • measurement scale: Celsius

  • certification: FREE traceable calibration certificate

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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