2 PH100/PH110-en-US_V3.3 10/21
Introduction
Thank you for selecting the Extech Model PH100 and/or the model PH110 (refillable) meter. This
instrument is designed for high accuracy pH testing. This device is shipped fully tested and, with
proper use, will provide years of reliable service. Please visit our website (www.extech.com) to check
for the latest version and translations of this User Manual and Customer Support.
ExStik
TM
Description
Front Panel Controls
1. Battery compartment cap
2. LCD Display
3. MODE / HOLD button
4. CAL / RECALL button
5. ON/OFF button
6. Electrode collar
7. Electrode
(Protective Electrode cap with sponge is not shown)
Display
1. Bargraph reading
2. Measurement reading
3. BAT (low battery) and
HOLD (data hold) indicators
4. Temperature display
5. Bargraph scale designations
6. Units of measure
7. Calibration indicators
8. RENEW and CAL indicators
CAUTIONS
• The pH membrane is made of special pH glass. This is somewhat fragile. Do not touch the
membrane or press this onto a hard surface. This meter is for measuring pH in a liquid
solution.
• If testing food, test a sample only and then discard the sample, do not place this meter directly
into the product. Test the surface of the sample and do not press into the sample.
• This meter is not for use on concrete.
• In case the device is going to be unused for an extended period of time, remove the batteries
to prevent them from draining or leaking.
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