ThermaGuard Fridge Temperature Monitoring Thermometer


ThermaGuard® Thermometers for high accuracy fridge temperature monitoring

  • two models available - single or dual external sensors
  • meets the European Standard EN 13485
  • 2 point (-18, 0°C) UKAS Calibration Certificates available
  • programmable high & low audible alarms
  • records the max/min temperature
  • UKAS options unavailable for next day delivery as certificated at time of order

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£60.00 ex VAT

  £72.00 inc VAT

The ThermaGuard Fridge Thermometer is a high accuracy fridge freezer thermometer that is available in two models for varying sensor needs. Essential for food safety, the max/min, alarm and CalCheck functions make this model a great option for HACCP compliance.

The internal sensor (101 model only) measures temperature over the range of -19.9 to 49.9 °C, while the external sensors measure over the range of -39.9 to 49.9 °C. Both have an accuracy of ±0.4 °C and a resolution of 0.1 °C/°F.

With a 25000 hour battery life (normal use, without alarm) the 1.5 volt AA batteries will only need changing every 34 months. 

The digital fridge thermometer incorporates a large LCD display which simultaneously displays the current and max/min recorded temperatures. Both models also feature programmable alarms to give you an audible warning if the temperature of your fridge or freezer falls outside the safe temperatures you set.

Each ThermaGuard is housed in a splashproof IP54, ABS case which includes Biomaster antimicrobial technology that reduces bacterial growth, ideal for monitoring chilled and frozen foods.

An optional two-point (-18, 0°C) UKAS Certificate of Calibration is available. Each certificate indicates deviations from standards at -18 and 0 °C. *UKAS certificate applies to remote probes only


Two models available

The ThermaGuard 101 incorporates two temperature sensors; a remote water resistant temperature probe with a one metre PVC lead for monitoring the appliance temperature and an internal sensor for the room temperature.

The ThermaGuard 102 incorporates two remote water resistant probes, both with one metre PVC leads for monitoring two appliances. Each remote probe can be mounted onto the internal wall of the fridge using the small ABS plastic mounting bracket supplied.


CalCheck function

Both models of the ThermaGuard features a CalCheck 0.0 °C (±0.1 °C) function that allows the user to verify the accuracy of the thermometer at any time, giving confidence that measurements are accurate.


Free wall bracket

Each ThermaGuard is supplied with a plastic wall bracket that incorporates a built-in foot stand, hook for hanging and screw thread for tripod mounting, allowing users to store or position the unit safely, securely and protect against accidental damage.

range internal:-19.9 to 49.9 °C (101 model only)
range external:-39.9 to 49.9 °C
resolution:0.1 °C/°F
accuracy:±0.4 °C
battery:2 x 1.5 volt AA
battery life:25000 hours (normal use, without alarm)
sensor type:thermistor
display: custom LCD
dimensions:29 x 73 x 96 mm
weight:165 grams
country of manufacture: United Kingdom
guarantee: two years
certification: optional UKAS Certificate of Calibration available
conforms to standard:EN 13485

Biomaster protection

Biomaster antimicrobial technology is incorporated in the majority of 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:





226-511 C of C

226-511 ThermaGuard 101 certificate of conformity

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226-512 C of C

226-512 ThermaGuard 102 certificate of conformity

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Thermaguard Operating Instructions

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