1770M Series Heat Prober Hand Held Type S Thermocouple Meters, °C


1770M Series handheld thermocouple type S meters have a temperature range of 25° to 1770°C and display in °C only.  Meter accepts all type S thermocouple probes with ANSI mini-connectors.

The pocket sized 1770M 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°C 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 TC840 Series Dipstick Thermometers.



1770M: LED Screen, NiCad Battery, °C
1770MX: LCD Screen, NiCad Battery, °C
1770MVX: LCD Screen, 9V Alkaline Battery, °C

Temperature Range

Celsius Range Only: -25 to 1770°C

Meter Accuracy

±0.2% of reading ±1 digit

FM Approved



1770M: 0.33 inch high visibility LED
1770MX and 1770MVX: 0.5 inch high red LCD

Peak Temperature Hold

Microcomputer calculated, switch to “P” to activate


Three years

NIST Available


Probe Connector

Type S Thermocouple ANSI mini-connector

Works With

Type S Thermocouple Probes


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

Battery Life

1770M: Approximately 8 hours
1770MX and 1770MVX: 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