Pocketherm Folding Thermometer

Part No: P250F (3060262)

Pocketherm Folding Thermometer P250F from Comark, it’s fast, it folds, it bleeps! Neat, Pocket Digital for quick checks on hot and cold holding and ground beef.

  • Temperature Range: -58°F to +482°F
  • LEDs indicate temperatures within HACCP limits
  • Battery Life: 300 Hours
  • Warranty: 2 Years


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Pocketherm Folding Thermometer

The Pocketherm Folding Thermometer P250F from Comark, it’s fast, it folds, it bleeps!

Pocketherm Folding Thermometer P250F fits in a pocket, or a bag, and the probe clips securely to the side of the thermometer for safety. The Pocketherm switches on when the probe is swung away from the instrument case and switches off when it is folded back. No buttons or adjustments required. The thermometer probe can be cleaned with a Comark bactericidal wipe between each temperature check.

Use this neat Pocket Digital Thermometer for quick checks on cold holding, hot holding and ground beef. The colored LEDs will light up to indicate temperatures within HACCP limits. The Pocketherm Folding Thermometer P250F will light up when the temperature recorded matches one of the pre-set HACCP Zones. This makes it really quick and easy to use.

Flashing LEDs plus buzzer for Instant Temperature Indication:

  • Yellow for Cold Holding
  • Green for Hot Holding
  • Red for Ground Beef


  • Probe swings open to switch on instrument
  • Probe can be angled to suite usage
  • Readings clearly shown on the large LCD display
  • LEDs for error free indication of temperature zones
  • Type T thermocouple measurements range covers frozen foods to hot plates, fats and oils
  • Displays Temperature in Fahrenheit Scale
  • Auto switch off for even longer battery life

Technical Specifications

Sensor TypeType T Thermocouple
Temperature Measurement Range-58°F to +482°F
Scales°F only
Displayed Resolution0.1°F
Accuracy +23°C /+73°F<+257°F, 0.3% ±1.35°F, >+257°F, 0.7% ±.45°F
Battery Type9V IEC 6LF22 alkaline
Battery Life300 hours
Auto Switch OffAfter 60 minutes
Operating Range - Temperature-4°F to +122°F
Operating Range - Humidity10% to 90% non-condensing
Buzzer/LED Indication (Flashing Yellow)Cold Holding: Less than +40°F
Buzzer/LED Indication (Flashing Green)Hot Holding: +140°F to +180°F inclusive
Buzzer/LED Indication (Flashing Red)Ground Beef: Above +160°F
Dimensions (Case)170mm x 52mm x 24mm
Probe Length110mm
Weight140g with battery
EMC StatementThe readings and LED operation may be temporarily affected in the presence of (RFI) Radio Frequence Interference
Warranty2 Years

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Articles / FAQs

Why is the Measurement Range of my Device greater than the Operating Range?

Why is the Measurement Range of my Device greater than the Operating Range?

The ‘Operating Range’ of a device is simply a measure of the ‘Temperature Range’ in which the electronics can handle. For a handheld like the P25OFW Pocketherm Folding Thermometer, this is often quoted as being ‘-20 to +50°C’ , which is about the maximum ‘Operating Range’ for a Thermometer that is hand-held. Use of the Thermometer outside of this range would be possible, but would require the use of specialized components which can withstand higher and lower extremes of temperature.

Any Thermometer that has a Probe connected to it, can cope with inputs that far exceed the ‘Operating Range’ because the instrument itself is not subjected to the same extremes of temperature. It is the Probe that is making the contact itself and which has to be built to withstand the extreme temperature.

In the case of the P25OFW Pocketherm Folding Thermometer, or any Thermometer with a fixed probe, it might seem seem a little odd having the ‘Measurement Range’ greater than the ‘Operating Range’. But in the case of the P25OFW Pocketherm it would be possible to insert the probe into a product that was very cold, so long as the instrument and the hand holding it did not drop below -20°C. However, in the main application for the Pocketherm Folding Thermometer – Food – this extreme cold is very unlikely, although may be possible to probe a frozen product that could be below -20°C.

20th November 2015
My device has corrosion in the battery compartment

My device has corrosion in the battery compartment

This may cause your device to cease functioning, or become dangerous. In all cases, please return your instrument to Comark for servicing.


Ideally, prevention is better than cure for this problem. Check your batteries regularly to ensure they have not leaked, and if you are planning to store the instrument without use for a prolonged period, please consider removing the batteries and storing them separately.

16th April 2015