Thermapen® 3 thermometer with air, surface or penetration probe

Buyer Rating: 5 out of 5 from 3 Reviews


Thermapen thermometer with  air, surface or penetration probe

  • temperature range -49.9 to 299.9 °C
  • lightweight, compact & easy to use
  • air, surface or penetration probe options
  • foldaway stainless steel probe
  • meets the European Standard EN 13485
  • one-handed operation
  • 2 year guarantee

More details

in stock

£55.00 ex VAT

£66.00 inc VAT

Two year guarantee Auto-off Made in UK Centigrade

The Thermapen 3 thermometer is also available with three alternative styles of probe; surface, air or general purpose penetration. The fast response air probe is an invaluable tool in establishing the correct air temperature quickly in HVAC and laboratory applications. The surface probe is particularly useful in determining the temperature of hot plates or pipe temperatures etc. Please note the accuracy and speed of response will be dependant on whether the surface is flat and heat transfer compound is used. Choose your preferred option from the drop-down to select appropriate model.

The Thermapen® 3 thermometer incorporates a large digital display with a precise read-out over the range of -49.9 to 299.9 °C with a 0.1 °C resolution and an accuracy of ±0.4 °C. The resolution can be switched to 1 °C, if required, via a switch in the battery compartment. The thermometer will power off automatically after ten minutes, maximising battery life. This feature can be disabled if not required. Both low battery (icon) and open circuit indication are also displayed, when applicable. Each Thermapen® is powered by two lithium coin cell batteries with a minimum life expectancy of 1500 hours.

The thermometer probe, conveniently folds back through 180 degrees into the side of the instrument when not in use. The casing is washable and includes 'Biomaster' additive that reduces bacteria growth and the ergonomic rubber seal minimises the risk of the ingress of water, dust or food.

Thermapen® is a registered trademark in the UK (2025607), EU (008449571) and the USA (3898535). It is also protected by EC Regd.Des.No. 001580473.

choice of probe styles

penetration probe surface probe air probe
This strong, versatile penetration probe with a pointed, general purpose tip is suitable for liquid and semi-solid insertion. This ribbon surface probe is ideal for measuring the temperature of a variety of flat surfaces, i.e. hotplates, pipework, bearings, etc. This fast response air probe is ideal for measuring the air temperature in laboratories and other temperature sensitive working areas.
 penetration probe  surface probe  air probe

To view the range of optional accessories for the Thermapen® industrial thermometer please click on the accessories tab.


range: -49.9 to 299.9°C
resolution: 0.1 °C or 1°C - user selectable
accuracy: ±0.4°C (-49.9 to 199.9 °C) ±1 °C (200 to 300°C)
battery: 2 x 3 volt CR2032 lithium coin cell
battery life: 1500 hours
sensor type: K thermocouple
display: 14.5mm LCD
dimensions: 19 x 47 x 153mm
weight: 97 grams
case material: ABS plastic with Biomaster anti-bacterial additive
country of manufacture: United Kingdom
guarantee: two years
measurement scale: Celsius/Fahrenheit
certification: FREE traceable calibration certificate
conforms to standard: EN 13485

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.



Thermapen alt instructions

Operating instructions for Pro-surface, air, penetration and surface Thermapens

Download (427.71k)

Thermapen Mk4 & Mk3 Guidebook

Guidebook for the Thermapen Mk4 and SuperFast Thermapen thermometers

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231-210 C of C

231-210 Thermapen 3 (penetration) certificate of conformity

Download (134.25k)

231-212 C of C

231-212 Thermapen 3 (surface) certificate of conformity

Download (133.89k)

231-214 C of C

231-214 Thermapen 3 (air) certificate of conformity

Download (134.62k)


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