Extech · Temperature & pH

Extech PH100 ExStik pH Meter with Replaceable Flat Electrode

A stick pH meter with a replaceable flat electrode, pH/temperature display and memory for 15 readings; buffers are separate.

Price & purchase ↓

The PH100 stick meter. The selected kit graphic lists cap, sample cup, batteries and strap, with pH buffers sold separately.

The equipment in use

How this item fits your brewing setup

The PH100 measures pH with a flat replaceable electrode and shows temperature on the same display. Its 15-reading memory lets you retain a small sequence of measurements on the instrument. Choose it when those features matter more than an integrated tester with a non-replaceable pH probe.

Extech specifies 0.00–14.00 pH,0.01 pH resolution and typical±0.01 pH accuracy. Automatic calibration supports one, two or three points. The selected supply includes the sensor cap, sample cup with cap, four CR2032 batteries and neck strap; calibration buffers must be obtained separately.

The temperature-reading range is −5 to 90°C, while the meter’s operating environment is 0–50°C. Temperature accuracy is ±1°C through 50°C and±3°C above 50°C, according to the current manual. These different scopes do not authorize heating the whole meter to the sample’s maximum reading temperature.

The glass sensing surface needs gentle handling despite its flat shape. Extech directs keeping the cap sponge moist with pH 4 solution during storage. Compare the PH20 if you want the supplied pH 4/7 buffers and a pocket case, or the MW102 if separate cabled probes suit the workspace better.

The selected reference

Specifications & supplied details

Maker: Extech
Model: PH100 ExStik
pH range: 0.00–14.00
pH resolution: 0.01
Typical pH accuracy: ±0.01
Electrode: Flat, replaceable
Memory: 15 readings
Calibration: One, two or three points
Temperature reading range: −5–90°C
Operating ambient range: 0–50°C
Manufacturer IP rating: IP57
Power: Four CR2032 batteries
Other supply: Sensor cap, sample cup with cap, neck strap
Calibration buffers: Separate purchase

Before and during use

Advice for this reference

Before you choose

Compare replaceable-electrode maintenance and saved readings with the contents of an integrated pocket kit.

Also check

Include calibration buffers and the maker’s cap-storage requirements in the purchase plan.

Documented use & care

Rinse the electrode after use according to the maker and selected care directions.

Keep the protective-cap sponge soaked with pH 4 solution for storage, as Extech directs.

Do not touch or press the fragile glass membrane against a hard surface.

Connections & scope

Fit and useful limits

No folding 114 mm metal probe,−50 to 300 C range, corded power or universal 11.4 cm immersion depth applies to this pH instrument.
Source IP67 field is not used; model-specificmaker and gallery state IP57.
PH110/PH115 refill procedures are not instructions for the supplied PH100 electrode.
No unlimited recordhistory or guaranteed measurement without calibration.

Questions about this product

What else should you know?

Can I keep saved readings while removing the batteries?

The current manual says battery removal clears stored readings and user calibration data. Record any measurements you need to keep before changing batteries.

Does a flat electrode mean it can be pressed firmly against a sample?

No. Extech describes a fragile glass membrane and says not to press it onto a hard surface. Use it according to the actual sample-measurement instructions.

Does the kit contain pH 4 and 7 buffers like the PH20 kit?

No buffers are established in this PH100 supply. The selected gallery specifically says to order them separately.

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