testo 104-IR - Dual purpose IR and penetration thermometer

Order-Nr.  0560 1040

  • A measuring instrument for determining surface and core temperature with intuitive operation

  • With integrated probe and infrared laser

  • HACCP / EN 13485 compliant

  • Durable and practical: rugged folding joint, waterproof housing (IP65), fits snugly in any pocket

  • Easy-to-read LCD display

  • Dirt cannot adhere to the instrument

The testo 104 dual purpose IR and penetration thermometer is ideal for both food inspectors as well as receiving departments. With the ability to scan surface temperatures from a distance using the IR sensor, and a fast response folding NTC penetration probe for core temperature checks, the 104-IR is an ideal thermometer for all aspects of the food industry.


A measuring instrument for determining surface and core temperature with intuitive operation.



Product Description

The testo 104-IR is a versatile, waterproof (IP65) penetration thermometer combined with an infrared sensor for both contact and non-contact temperature measurements. The 104-IR is an ideal solution for all aspects of the food industry ranging from receiving goods to food inspectors.  The testo 104-IR scans the surface temperature of individual foods or entire pallets from a distance with the highest accuracy. If a limit value is exceeded or undershot, the folding penetration probe is also able to measure core temperature. The dual-purpose instrument is handy and practical, and easily fits into a shirt pocket. The penetration probe is always secure and neatly folds away when not in use. As soon as the probe is opened up, the display is automatically activated and its ready to use, and the IR measurement starts with the touch of a button. Results are easily read on the large and bright back lit display.  For quick, super accurate and convenient temperature measurements anywhere at anytime the 104-IR thermometer is unmatched in value and quality.

Delivery Scope

testo 104-IR waterproof folding food thermometer, user guide, calibration protocol, adhesive color strips, batteries

Technical Data

Temperature - NTC

Measuring range

-58° to 482 °F / -50 to +250 °C


±2 °F (-58° to -22.2 °F) / ±1 °C (-50.0 to -30.1 °C)

±0.9 °F (-22° to 211.8 °F) / ±0.5 °C (-30.0 to +99.9 °C)

±1 % of mv (Remaining Range)


0.1 °F / 0.1 °C

Reaction time

t99 = 10 sec (measured in moving liquid)

Temperature - Infrared

Measuring range

-22° to 482 °F / -30 to +250 °C


±4.5 °F (-22° to -4.2 °F) / ±2.5 °C (-30 to -20.1 °C)

±3.6 °F (-4° to 31.8 °F) / ±2.0 °C (-20 to -0.1 °C)

±2.7 °F or ±1.5 % of mv (Remaining Range) / ±1.5 °C or ±1.5 % of mv (Remaining Range)

Measuring rate

0.5 sec

Infrared resolution

0.1 °F / 0.1 °C

General technical data


7 oz. (incl. batteries) / 198 g (incl. batteries)


11.1 x 1.9 x 0.9 in. (Probe folded out) / 281 x 48 x 23 mm (Probe folded out)

7.0 x 1.9 x 0.9 in. (probe folded away) / 178 x 48 x 23 mm (probe folded away)

Operating temperature

-4° to 122 °F / -20 to +50 °C

Protection class


Length probe shaft tip

1.26 in. / 32 mm

Diameter probe shaft

0.118 in. / 3 mm

Diameter probe shaft tip

0.098 in. / 2.5 mm


ABS / TPE / PC, diecast zinc, stainless steel

Length probe shaft

4.173 in. / 106 mm

Product colour


Laser spot

on / off

Measurement value

Temperature °C / °F / °R

Measurement mode

Hold or auto hold (immersion probe)

Dimensions (probe folded out)

281 x 48 x 23 mm

Dimensions (probe not folded out)

178 x 48 x 23 mm


EN 13485

Battery type

2 AAA batteries

Battery life

10 h at 25°C typical

Display type


Display size


Display function

with status line (°C,°F,°R, battery, hold/auto hold, min, max, laser, measurement, emissivity)

Display ligthing


Storage temperature

-22° to 158 °F / -30 to +70 °C


Monitor Food Temperature: Incoming Goods, Transport & Storage

The temperature of food has a critical influence on product quality and consumer health. In order to ensure food safety and prevent the proliferation of germs, it is necessary to monitor food temperatures. During transport, upon receipt and throughout storage, make sure that cooling compliance is uninterrupted by using both infrared and core temperature measuring technology. The testo 104-IR infrared and penetration thermometer helps you do this. This instrument offers:

- Fast scanning of the goods delivered using infrared measuring technology

- Immediate inspection of critical values via fold-out penetration probe

- Fast and easy display of the measuring range via 2-point laser

- Durability and a waterproof housing

- HACCP-compliant measurement