Introduction
Thank you for selecting this Extech Portable Thermometer for home use. This device is intended
for use in measuring the temperature of air, liquid, paste, or semi‐solid materials. The TM20
uses a standard temperature probe while the TM25 is equipped with a penetration probe for
insertion into materials under test. This meter is shipped fully tested and calibrated and, with
proper use, will provide years of reliable service. Please visit our website (www.extech.com) to
check for the latest version of this User Guide, Product Updates, and Customer Support.
Safety
International Safety Symbols
This symbol, adjacent to another symbol or terminal, indicates the user must refer to the
manual for further information.
This symbol, adjacent to a terminal, indicates that, under normal use, hazardous voltages
may be present
Double insulation
General Safety
o
Please read all safety and instructional information before using these products.
o
These products are intended for home use only on air, liquid, pastes, and semi‐solid
materials.
o
Unauthorized repairs, modifications, or other changes to the products are not supported.
o
This product is not intended for use in medical practice.
2
TM20-TM25-EU-EN V1.6 4/13
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Questions and answers