This portable tester measures pH in a range of -2.0 to 16.0 with a resolution of 0.1 pH and Temperature (°C/°F).

Note:It is normal for salt deposits to form on the outside of electrode cap or on cap/rim. This is dried bottling solution from inside cap. Wipe off with soft tissue and rubbing alcohol or use tap water.
Key features...

Replaceable pH electrode with renewable cloth junction.
Stability and ATC (automatic temperature compensation) indicators.
Switchable between °C and °F.
HOLD function temporarily holds display so you can view a single reading.
BEPS (Battery Error Prevention System)
Battery % displayed at startup
Automatic 1 or 2 point calibration.
Meter is waterproof and it floats.
Dual line LCD displays pH and temperature.
Unique renewable cloth electrode junction - when clogged, simply pull a short length out, snip off old section, and expose fresh material.

pHep4 Specifications...

Ranges:
pH -2.0 to 16.0.
Temp -5.0 to 60.0 °C (23.0 to 140.0 °F).
Resolution:
pH 0.1
Temp 0.1°C / 0.1°F
Accuracy @ 20°C:
pH ±0.1
Temp ± 0.5 °C (± 1 °F)
pH Calibration:Automatic one or two point with two sets of standard buffers:
pH 4.01 / 7.01 / 10.01 (standard set).
pH 4.01 / 6.86 / 9.18 (NIST set).
Temp. Compensation: Automatic (user may disengage).
Environment: Use meter from 0 to 50°C (32 to 122 °F); RH 100%.
Battery Type/Life: 4 x 1.5V w/ Battery error prevention system / approx. 300 hours.
Auto Shut-off: After 8 minutes non-use.
LCD: Custom, dual-level.
Casing: Waterproof, 100% buoyancy.
Stability indicator: Illuminates when pH reading is stable.
Dimensions: 163 x 40 x 26mm (6.4 x 1.6 x 1.0 inches).
Weight: 100g (3.5 oz).