Apera Instruments PHB-3 Economic Waterproof pH Pocket Tester, ±0.1 pH Accuracy, 0-14.0 pH Range

The Apera Instruments PHB-3 Pocket pH Tester is the most economic choice of a reliable pocket pH tester for your regular water solution's pH measurement, including hydroponics, aquaculture, pools& spas, education, tap/drinking water, etc. Easy single button operation for 1-point Auto Calibration (pH 7.0) and 0 to 50˚C Auto Temperature Compensation (ATC); ±0.1 pH, 0.5˚C accuracy with 0 to 14.0 pH range.

Comes with a complete kit of premixed calibration solution (pH 7.00), AAA batteries in a portable carrying case. Auto power-off in 10 min if no operation, low-battery alarm. IP57 waterproof and dustproof, floating on water so you don’t have to worry if it falls into water by accident. 1000 hours' continuous operation (without backlit) powered by AAA batteries.

The meter is CE certified and comes with a 2-YEAR Warranty (6 months for the probe). The company designs and manufactures scientific analytical instruments like meters and sensors for pH, conductivity, turbidity, and dissolved oxygen for over 25 years, and meets ISO 9001:2008 Standards.

NOTES: The instrument will NOT give accurate or stable readings for distilled or deionized water's pH testing. This is because distilled and deionized water do not have enough ions present for the electrode to function properly. To measure distilled or deionized water’s pH, users need to use a specialized pH electrode. Do NOT store the probe in distilled water or deionized water because they will cause damage to the glass membrane of the pH probe. Only use distilled water for cleaning the pH probe.