2500M Series Heat Prober Hand Held Type K Thermocouple Meters, °F


Handheld thermocouple type K meter measures temperatures in Fahrenheit, with a range of -100° to 2500°F. This model accepts all type K thermocouple probes with ANSI mini-connectors.

The pocket sized 2500M series models use a microprocessor to update temperature readings 3 times per second with an accuracy of ±0.2% of reading ±1 digit with 1°F resolution.  The precision cold junction is compensated using a unique, permanently calibrated circuit.

Units are calibrated with simulated EMF inputs and powered during a high temperature burn-in cycle.  Choose from models with LED or LCD screens, and will rechargeable NiCad or standard alkaline battery.  All NiCad models come with a battery recharger.

This meter is used in our TC850 Type K Dipstick Systems.



2500M: LED Screen, NiCad Battery, °F
2500MX: LCD Screen, NiCad Battery, °F
2500MVX: LCD Screen, 9V Alkaline Battery, °F

Temperature Range

Fahrenheit Range Only: -100 to 2500°F

Meter Accuracy

±0.2% of reading ±1 digit

FM Approved



2500M: 0.33 inch high visibility LED
2500MX and 2500MVX: 0.5 inch high red LCD

Peak Temperature Hold

Microcomputer calculated, switch to “P” to activate


Three years

NIST Available


Probe Connector

Type K Thermocouple ANSI mini-connector

Works With

Type K Thermocouple Probes

Ambient Operating Range

2500M and 2500 MX; -20°/120°F (-29°/49°C)
2500MVX: 0°/120°F (-18°/49°C)


M Models: 6.25 V NiCad Battery, PN: 11681-1
V Models: Standard 9V Alkaline Battery

*For rechargeable models, add E to part number to specify a European plug adapter.

Battery Life

2500M: Approximately 8 hours
2500MX and 2500MVX: Approximately 50 hours

Low Battery Indicator



W: 3 inches x L: 6 inches x D: 1.5 inches
W: 7.5 cm x L: 15 cm x D: 3.75cm


All Models: 10.5 ounces (298 grams)


LED Screen models: 0.33 inches with bright red LED
LCD Models: 0.5 inches with red digits