APERA INSTRUMENTS / PH60Z-PW / AI3739

Smart pH for pure water.
Built for low ionic strength.

The PH60Z-PW pairs Apera’s PH60Z smart tester with the LabSen 805 pH/temperature electrode, made for pure water, low-ionic-strength solutions and low-temperature water: distilled, RO and deionized samples that make an ordinary electrode drift. Its L-type low-resistance glass and three ceramic junctions are aimed at exactly that.

The tester works on its own from the keypad, or pairs over Bluetooth with Apera’s free ZenTest app for guided calibration, calibration reminders and unlimited data logging. It reads −2.00 to 16.00 pH at ±0.01 pH, is IP67 rated and runs on four AAA batteries. The kit includes pH 4.00, 7.00 and 10.01 buffers, 3M KCl soaking solution and the CalPod solution organizer in a carrying case.

Meet the LabSen 805.

Pure water barely conducts, which makes an ordinary electrode slow and noisy. The LabSen 805 uses Apera’s L-type low-resistance glass with an enlarged sensing area, three ceramic junctions and a blue gel inner solution that keeps bubbles off the sensor.

It reads pH 0–11 from 0 to 80°C. Apera also recommends it for low-temperature water and for other low-ionic-strength solutions.

Calibrate from pH 7.00.
Then add the points you need.

Pour the buffers into the CalPod. Always start at pH 7.00: dip, stir briefly, long-press CAL (the screen turns green), and short-press CAL when the stability icon stays on. Continue straight to pH 4.00 and pH 10.01 without switching the meter off. Powering off between points forces you to start again at pH 7.00.

The meter recognizes USA buffers (1.68, 4.00, 7.00, 10.01, 12.45) or NIST buffers (1.68, 4.01, 6.86, 9.18, 12.45) and confirms each point with an icon. Apera suggests reusing poured buffers up to 10 times, but pH 10.01 only up to 5, and calibrating at the sample’s temperature for the best accuracy. In the ZenTest app, calibration is guided on screen and reminders can be scheduled.

Clean it, then store it wet.

Rinse the electrode with distilled or deionized water before and after every measurement, and blot it with a lint-free wipe; never rub the glass. For oils, proteins, scale or unknown deposits, Apera’s table gives the cleaning agent and soak time, followed by 12–24 hours in 3M KCl and a fresh calibration.

Store the electrode in its vial with 3M KCl soaking solution and replace the solution about monthly. Never store it in tap, RO, distilled or deionized water. White crystals around the vial are dried KCl and harmless. Apera expects a pH electrode to last one to two years; replacement LabSen electrodes connect to the same tester.

Check the specifications.

The PH60Z tester reads −2.00 to 16.00 pH at 0.01 resolution, ±0.01 pH ±1 digit, with automatic or manual temperature compensation from 0 to 100°C. It also reads −1000 to 1000 mV (±0.2% F.S) and temperature from 0 to 100°C (±0.5°C ±1 digit), and has a three-color backlight, auto-hold, reading alarms and self-diagnosis.

The LabSen 805 reads 0 to 11 pH from 0 to 80°C. The tester runs on four AAA batteries, is IP67 rated, and measures 40 × 40 × 178 mm at 133 g.