testo 176T4 - Four-channel temperature data logger

Order-Nr.  0572 1764

  • External thermocouple parallel connections provide reliable temperature monitoring at up to four sites

  • Large, easy to read, bright, backlit display makes it easy to see the current temperature

  • Large data memory capable of storing 2,000,000 temperature readings

  • Rugged and waterproof according to IP54

The testo 176T4 temperature measuremt logger, with its bright, backlit display, is ideal for the monitoring of multiple temperatures. The 176T4 temperature data logger has external thermocouple parallel connections, which allows for simultaneous temperature measurements at four sites using a wide variety of probes. Creation of Excel Spreadsheets, PDFs, and data analysis are all easily achieved with the free, downloadable ComSoft software.

This meter uses a sensor to start up.

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Product Description

The testo 176T4 temperature measurement logger is an ideal data logger for the monitoring of temperatures.
  • External thermocouple parallel connections compatible with a variety of different probes
  • Data transfer possible using the USB port, or SD card (optional)
  • Easy to read large display that shows current reading
  • IP54 protection class
  • Capable of CFR 21 Part 11 Compliancy
  • Free data logger software available for download
  • Data is secured within the logger, and can be password protected using ComSoft


Delivery Scope

testo 176T4 temperature data logger with external parallel connections, batteries, and certificate of conformity
Temperature - Type K TC

Measuring range

-328° to 1832 °F / -200 to +1000 °C


±1 % of mv (-328° to -148.2 °F) ±1 Digit / ±1 % of mv (-200 to -100.1 °C) ±1 Digit

±0.5 °F (-148° to 158 °F) ±1 Digit / ±0.3 °C (-100 to +70 °C) ±1 Digit

±0.5 % of mv (158.2° to 1832 °F) ±1 Digit / ±0.5 % of mv (+70.1 to +1000 °C) ±1 Digit


0.1 °F / 0.1 °C

Temperature - TC Type T (Cu-CuNi)

Measuring range

-328° to 752 °F / -200 to +400 °C


±1 % of mv (-328° to -148.2 °F) ±1 Digit / ±1 % of mv (-200 to -100.1 °C) ±1 Digit

±0.5 °F (-148° to 158 °F) ±1 Digit / ±0.3 °C (-100 to +70 °C) ±1 Digit

±0.5 % of mv (158° to 752.0 °F) ±1 Digit / ±0.5 % of mv (+70.1 to +400 °C) ±1 Digit


0.1 °F / 0.1 °C

Temperature - Type J TC

Measuring range

-148° to 1382 °F / -100 to +750 °C


±0.5 °F (-148° to 158 °F) ±1 Digit / ±0.3 °C (-100 to +70 °C) ±1 Digit

±0.5 % of mv (+158.2° to 1382 °F) ±1 Digit / ±0.5 % of mv (+70.1 to +750 °C) ±1 Digit


0.1 °F / 0.1 °C

General technical data


8.11 oz. / 230 g


4 x 2 x 1 in. / 103 x 63 x 33 mm

Operating temperature

-4° to 158 °F / -20 to +70 °C



Protection class



4 external

Connectable probes

4 x thermocouple (type T, K and J)

Product colour



EU-guideline 2014/30/EU; 2011/65/EU

Measuring rate

1 s to 24 h; 2 s to 24 h (online measurement)

Battery type

1 x Lithium (TL-5903)

Battery life

8 years (15 min. meas. rate, +25 °C)


mini usb, SD card slot


2,000,000 measuring values

Storage temperature

-40° to 185 °F / -40 to +85 °C

Surface probes

Checking the temperature in super freezers or under cryogenic conditions

Specific products must be stored under extremely cold conditions so as to ensure their quality. Therefore, in many laboratories and research facilities you can for instance find super freezers which can be cooled down to -80 °C using liquid nitrogen or dry ice.
In many cases storage under cryogenic conditions is even required. So, particular biological or blood products are for example stored and transported at -196 °C. Special measuring instruments, which are also fit for purpose at such low temperatures, are needed to check these extreme conditions.

Monitoring process temperatures

For production quality assurance, the temperature must frequently be checked at various points in production processes. Whether it is the air temperature, the temperature of production items themselves or the surface temperature of machines or motors.
Using thermocouple probes, data loggers can also record data in the kinds of extreme temperature ranges that are often to be found in production processes. The probe's fast speed of response contributes here to a good measurement result being achieved even in processes where temperatures change quickly.

Checking the flow and return temperature of heating systems

The heating period starts in autumn and with it the time for tenants to complain that the apartment cannot be heated to the extent they want as well. Using flexible external pipe wrap probes, you can for instance check the flow and return temperature of individual heaters in a targeted way, so as to identify causes and remedy them.