TM630A Pocket Thermocouple & RTD Thermometer


Wahl TM630A Series Pocket Thermometers are compatible with both RTD & Thermocouple probes for maximum measuring flexibility.  Featuring 0.02% Accuracy and measure in both Thermocouples & RTDs. Resolution is programmable for better reading by user with up to 1mΩ or 1μV.  Rugged IP54 construction is ideal for on-site use as a metrology or control tool. Automatic detection determines if sensor is 2, 3, or 4 wire RTD.

This model includes advanced features, including calibrated sensors (creating a database to design curves for sensors after calibration in relation to the corrections shown on a calibration report), scaling (for correction of probe errors), and data recording (manually, on event, or automatically.)

This meter is compatible with our RTD probes with part numbers ending with TMA and our thermocouple probes with part numbers beginning with TC.



0.02% of reading
RTD Accuracy is for a 4 wire connection

Temperature Coefficient

15 ppm / °C in thermocouples
10 ppm / °C in RTDs

RTD Connection

Lemo 4-pin connector

Thermocouple Connector

Mini compensated connector

Compatible Thermocouple Types

K, T, J, E, R, S, B, U, L, C, N, Platinum, Mo, NiMo/NiCo


Graphical LCD with adjustable contrast and backlight.
Display in °C, °F, mV and Ohms

Display Resolution

Three user selectable resolutions, up to 3 decimal places: High, Middle or Low resolution.


English, Spanish, French, German, Italian

Date and Time

Continuously displayed

CJC Accuracy



Freezes the display


Maximum, Average, and Minimum are displayed. Reset function allows re-calculating of the values.


A filter can be applied to avoid fluctuation of the value.


One year warranty covers defects in materials and workmanship


Recording and onscreen analysis


Specifications are at 23°C ± 5°C, between 45% and 75% relative humidity.

Power Supply

Four AA size batteries

IP Rating

IP 54 according to EN 60529

Estimated Battery Life

40 hours

Electrical Security


Electromagnetic Capability



6.18 in x 3.35 in x 1.77 in (157mm x 85mm x 45mm)


10.79 ounces (306 grams)

Included Accessories

Protective Boot, Four AA batteries, and wrist strap.

Nominal Operating Conditions

-10°C up to +50°C, Relative Humidity: 20% up to 80% non-condensing

Maximum Operating Conditions

-10°C up to +55°C, Relative Humidity: 10% up to 80% (70% at 55°C)

Maximum Storage Temperature

-30°C up to +60°C (without batteries)