Built-in self-diagnosis ensures pH calibration will be performed correctly and guides you on how to fix common problems.

The next-generation tester designed for seamless water test experience. Professional pH measurements for general water solutions now become easier than ever. ORP test is also available with an ORP probe (sold separately).


Just connect the tester to your smartphone via Bluetooth in the ZenTest mobile App (Free download in iOS App Store/Google Play Store), the step-by-step smart guide will lead you to become a water test professional with just a few taps.
Save and share your measurement and calibration data right on the palm of your hand via email. Data will never get lost thanks to the cloud-based data system.

The Apera Instruments SX610 pH Pen Tester is featured with reliable measuring performance with a single-button operation in a slim body. A cost-effective choice for your regular pH testing, including hydroponics, water treatment, education, pools& spas, and etc. The pH probe is replaceable and suitable for test tube measurements, which is especially good for educational use.


Easy Auto Calibration (1 point: 7.00 pH) with buffer recognition and 0 to 60°C(32-140°F) Auto Temperature Compensation (ATC), ±0.1 pH/1.0°C accuracy with 0 to 14.0 pH measuring range. Intelligent functions: automatic power-off, low battery alarm, pH probe invalidation reminder (remind you to replace the probe for better performance).

The SX610 pH Pen Tester/Meter comes with a complete kit of premixed calibration solutions (7.00 pH), storage solutions (3M KCL), CR2032 lithium batteries all in a portable carrying case. IP57 waterproof and dustproof floats on water, so you don’t have to worry if it falls into the water by accident.