







Thermapen ONE Thermometer
Thermapen ONE food thermometer for fast, accurate temperature readings
- Reaches temperature in just 1 second
- High accuracy of ±0.3 °C
- 5-year guarantee
- Auto-rotating display
- Waterproof to IP67
- Auto-intelligent backlit display
- Motion-sensing sleep mode
- Free traceable calibration certificate
- Meets the European Standard EN 13485
Loved by professional chefs worldwide, the Thermapen ONE digital instant-read thermometer is the superior tool for food safety plans like HACCP
The Thermapen instant-read thermometer's large display shows precise temperature measurements with a 0.1 °C resolution. It features a wide temperature range of -49.9 to 299.9 °C.
Both low battery (icon) and open circuit indications are displayed when applicable. Each Thermapen is powered by a single AAA battery and has a life expectancy of 2000 hours. The Thermapen One is fully configurable using buttons in the battery compartment. Here you can lock the display position, disable auto-sleep mode, switch between °C and °F readings, or choose between a 1° and 0.1° resolution.
Thermapen® is a registered trademark in the UK (2025607), EU (008449571) and the USA (3898535).
It is also protected by German Utility Patent DE202013103605 (U1), EC Regd.Des.No. 002535161-0003 and EC Regd.Des.No. 002535161-0005.
The automatic 360° rotational display is protected by UK Patent No. GB 2504936 and USA Patent No. US 9470560
Data sheet
| Range: | -49.9 to 299.9 °C |
|---|---|
| Operating Range: | -20 to +50 °C |
| Resolution: | 0.1 °C or 1 °C - user selectable |
| Accuracy: | ±0.3°C (-19.9 to 119.9 °C)±0.4°C (-49.9 to 199.9 °C) otherwise ±1 °C |
| Battery: | 1 x 1.5 volt AAA |
| Battery Life: | 2000 hours (without backlight), 100 hours backlight on time |
| Sensor Type: | K- Thermocouple |
| Display: | 14.3mm (horizontal) x 11.85mm (vertical) LCD |
| Backlight: | Yes |
| Dimensions: | 48.2mm x 156.2mm x 19.3mm |
| Weight: | 115 grams |
| Case Material: | ABS plastic includes Biomaster product protection |
| Country of Manufacture: | United Kingdom |
| Guarantee: | five years |
| Water/Dust Resistance: | IP67 Protection |
| Measurement Scale: | Celsius/Fahrenheit |
| Certification: | FREE traceable calibration certificate |
| Probe Diameter: | ø3.3mm Fast Response |
| Probe Length: | 110mm |
| Conforms to Standard: | EN 13485 |
| UKCA / CE Status: | CE 1639 Approved |

Frequently Asked Questions
Clear answers to help you choose the right water testing solution with confidence
Which brands of water testing kits do you supply?
Do you provide kits for both home and professional use?
Yes — whether you’re a pool or spa owner, aquarium keeper, utility company, or a university laboratory, we have the right solution for your needs.
Can I arrange servicing or calibration for my photometer?
Absolutely. We also provide servicing and calibration to keep your photometers accurate and reliable.
How quickly do you dispatch orders?
Orders placed before 2:30 pm (Monday–Friday) are dispatched the same day. We also ship on Saturdays for your convenience.
Which couriers do you use for delivery?
We deliver through UPS, DPD, and Royal Mail. You can also choose to upgrade to next-day delivery at checkout.
What is your return policy?
We accept returns within 14 days of delivery provided the items are unused, in their original packaging, and in resalable condition. Please contact our team before returning any items.
Can I place bulk or business orders?
Yes, we welcome bulk, trade, and institutional orders. For tailored pricing or large quantities, please get in touch with us directly.
How can I get help if I’m unsure which kit to buy?
You can call us at 📞 +44 (0)115888 2726 and our team will guide you in choosing the most suitable kit for your needs.