Therma 20 Plus waterproof thermometer for food processing

brand: ETI


Therma 20 Plus IP66/67 waterproof thermometer.

  • FREE traceable certificate of calibration 
  • meets the European Standard EN 13485
  • FREE traceable certificate of calibration
  • UKAS 3 point certificate available (+£48)
  • 2 year guarantee
  • includes 'Biomaster' anti-bacterial additive
  • excludes probe

More details

in stock

Buyer Rating: 4.5 out of 5 from 2 Reviews
Backlit display Two year guarantee Hold Auto-off HACCP Made in UK Max-Min Lumberg connector IP66-67 Biomaster Protected

£80.00 ex VAT

£96.00 inc VAT

The Therma 20 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 20 Plus measures temperature over the range of-39.9 to 149.9 °C with a 0.1 °C resolution.

The thermometer features a large easy to read, LCD displaywith 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.

The Therma 20 Plus incorporates an easy to use waterproof Lumberg screw-locking type connector, allowing a widerange of interchangeable thermistor probes to be used. ETI offers an extensive range of thermistor probes for the Therma 20 Plus

Add a Probe:

colour-coded penetration probe
Penetration Probe
NTC thermistor penetration probe for Therma 20 Plus.
Therma 20 pentration probe
Plug Mounted Probe
Therma 20 penetration probe. ideal for liquids etc
fast response penetration probe
Waterproof Thermistor Probe.
Waterproof NTC thermistor penetration probe.

Optional accessories:

Thermistor test caps with UKAS certificate of calibration and coloured silicone boots are also available to complement you Therma 20 Plus thermometer - click the accessories tab to find out more.


range:-39.9 to 149.9°C
resolution:0.1°C to 300°C thereafter 1°C
accuracy - instrument only :±0.2°C
system accuracy:±0.4 °C (-24.9 to 109.9 °C)
system accuracy - type T t/c:±0.5 °C (-49.9 to 149.9 °C)
battery:3 x 1.5 volt AAA
battery life:7500 hours
sensor type:thermistor
display: 15mm LCD
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/Fahrenheit
certification: FREE traceable calibration certificate
conforms to standard:EN 13485

User Manual TC-Plus-Therma-Plus

Operating Instructions for ETI ThermaCheck Plus, Therma 20 Plus and Therma 22 Plus thermometers

Download (471.53k)

232-040 C of C

232-040 Therma 20 certificate of conformity

Download (133.24k)
  • order code: 174-166
    £36.00 inc VAT

    in stock

    Colour-coded NTC thermistor penetration probe for Therma 20 thermometerideal for liquids, semi-solids and more probe temperature range -40 to 150°C accuracy ±0.4 °C between -20 & 100 °C Ø3.3 x 130mm

    £36.00 inc VAT

    in stock
  • order code: 286-001
    £42.00 inc VAT

    certificated at time of order

    Thermistor test caps.supplied with a UKAS Certificate of Calibration verify accuracy of any thermistor thermometer available in range of temperatures unavailable for next day delivery as certificated at time of order 

    £42.00 inc VAT

    certificated at time of order
  • order code: 172-000
    £42.60 inc VAT

    in stock

    Waterproof stainless steel penetration probeideal for liquids and semi-solids response time less than 3 seconds probe temperature range -40 to 150°C accuracy ±0.4 °C between -20 & 100 °C Ø3.3 x 100mm

    £42.60 inc VAT

    in stock
  • order code: 174-266
    £47.40 inc VAT

    in stock

    Waterproof NTC thermistor penetration probe with lumberg connector.suitable for liquids, semi-solids and granular  materials response time less than three seconds. probe temperature range -40 to 150°C accuracy ±0.4 °C between -20 & 100 °C Ø3.3 x 130mm

    £47.40 inc VAT

    in stock

ThermaData Studio v3.1.0 (Windows 10)

ThermaData Studio v3.1.0 (Windows 7 & 8)

ThermaData Studio software for real-time data collection, graphing, statistical analysis, and exporting data in user friendly dashboard style directly to the PC. Available for free download. Single software suite works with ThermaData LoggersUSB Probes and BlueTherm Probes

Works with:

  • ThermaData Series I
  • ThermaData Series II
  • ThermaData Series RF
  • ThermaData Series SST
  • ThermaData Series Thermocouple
  • BlueTherm Probe/IR/Duo
  • ThermaData Series USB Temperature Probes

View the data you want to see, when you want to see it. Customise the ThermaData Studio dashboard view with real-time trend graphs, table views of recorded readings, statistical analysis, current temperature displays, summary data view and more. Import a map of your facility and with ThermaData RF Wireless and BlueTherm Loggers you can add each device in the map view. See exactly where every alarm condition is located.

ThermaData Studio Software

ThermaData Studio allows the connection of up to 16 RF Wireless Loggers and an unlimited number of ThermaData Series I & II Loggers.

Eliminate the need for multiple software systems with the ThermaData Logger software package. With only one software system, training, setup, download and temperature monitoring is easy.

  • Single software system works with over 40 different logging devices
  • User friendly Dashboard design
  • Allows real-time data acquisition (for compatible devices)
  • Graphing/trending chart with up to 32 traces
  • Statistical and table view
  • SMS alarm condition alerts
  • Import facility map for identifying logger by physical location
  • Combine and preview data from multiple loggers and files




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.



Customers who bought this product also bought: