Pro pH Meter — Backlit, 3-Point Calibration
Details
A step up from a basic pH pen: three-point calibration, automatic temperature compensation, and a display that turns red when the reading leaves the safe range so you notice from across the room.
- Three-point calibration. Calibrates against 4.00, 6.86 and 9.18 buffers and recognises which one it is in. A single-point pen drifts at the ends of the scale, which is precisely where a problem shows up.
- Backlit out-of-range alarm. The backlight goes red below 3.5 and above 12.5 pH. On a planted tank running CO2 this is the reading you want to catch early, not at the next water change.
- Automatic temperature compensation. pH readings shift with temperature. The meter reads temperature and corrects, and shows both.
- Replaceable probe. The electrode is the part that ages. A meter with a detachable probe is repairable; a sealed one is disposable.
- English display and controls. Worth stating plainly, because a lot of gear at this price arrives with Chinese-only button legends.
Specifications
- Range
- 0.00 – 14.00 pH
- Resolution
- 0.01 pH
- Accuracy
- ±0.1 pH
- Calibration
- 3-point: 4.00 / 6.86 / 9.18
- Temperature
- Measured, with auto compensation
- Display
- Backlit, red alarm out of range
- Probe
- Replaceable electrode
- Category
- Aquarium Water Test Kits
- Shipping
- See delivery times
- Returns
- 30 days
Questions about this light
Frequently asked questions
How is this different from the basic pH pen?+
Three-point calibration instead of one, temperature compensation, a backlit out-of-range alarm, and a replaceable electrode. If you only need a rough weekly check, the basic pen is enough.
How often does it need calibrating?+
Monthly for a tank, more often if you keep it in storage solution rather than dry. Any pH meter that has not been calibrated recently is a guess with a decimal point on it.
Can I use it for hydroponics as well?+
Yes — same measurement, and the three-point calibration matters more in nutrient solution than in a tank.
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