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407227_407228-en-GB_v3.2 10/18
Introduction
Thank you for selecting the Extech Model 407227 pH, mV, and Temperature Meter. This
device measures pH, mV (ORP), and Temperature. The temperature units (C/F) are
selectable and the Calibration and Slope adjustments are conveniently located on the
front panel.
The 407228 is the kit that includes the 407227 meter, pH electrode, temperature probe,
protective holster jacket with stand, and carrying case. An optional ORP electrode
(67500B) is available.
This device is shipped fully tested and calibrated and, with proper use, will provide years
of reliable service. Please visit our website (
) to check for the latest
version of this user manual.
