Lab-grade ±0.01 pH accuracy in a waterproof, field-ready pocket tester — complete kit, nothing extra to buy.
Apera PH60 (AI311) is a waterproof, IP67-rated pocket pH tester built for daily use in commercial hydroponic, coco, and water-culture environments. It delivers ±0.01 pH accuracy with full Auto Temperature Compensation and ships as a ready-to-use kit — tester, calibration solutions, storage solution, bottles, batteries, lanyard, and carrying case all included.
The Apera AI311 is the PH60 Premium Series pocket pH tester — a professional-grade, waterproof handheld meter designed for frequent, reliable pH measurement in commercial water-solution applications. At its core is Apera's proprietary lead-free, lithium-based glass membrane probe, engineered from rare-earth materials and rated for fast response and high repeatability in nutrient-rich hydroponic solutions, RO-amended feed water, reservoir tanks, and recirculating systems.
The meter reads across a −2.00 to 16.00 pH range at ±0.01 pH accuracy with 0.01 pH resolution, covering every realistic pH value encountered in licensed cannabis and hemp cultivation. Auto Temperature Compensation (ATC) corrects readings continuously across 0–50°C (32–122°F), so temperature fluctuations in a working grow environment don't introduce measurement error.
Any licensed cultivation operation running hydroponic, coco, or DWC systems where feed-water pH directly determines nutrient uptake and plant health. Head growers and cultivation technicians who are pulling multiple pH checks per shift need a meter that calibrates quickly, holds calibration, and gives an unambiguous stable-reading confirmation — not a cheap pen that drifts between uses.
The PH60 is equally at home in a state-of-the-art indoor facility running automated fertigation as it is at a hands-on craft grow checking reservoir pH by hand twice a day. The IP67 waterproof and dustproof rating means it survives the wet, high-humidity conditions of an active grow room, and the floatable body means an accidental drop into a reservoir doesn't end the tool's life.
Auto-calibration supports 1-, 2-, or 3-point calibration and automatically recognizes five standard buffer types (pH 1.68, 4.00, 7.00, 10.01, and 12.45) — no manual entry, no guesswork. The Stable-Value Recognition feature detects a settled reading and flags it with a smiley-face icon on screen, with an optional Auto-HOLD function that locks the value so you don't have to watch the display and guess when to record.
The large color-backlit LCD uses three distinct backlight states to communicate at a glance: blue during measurement, green during calibration, and red when a reading crosses a user-defined high or low alert threshold. That red alert is especially useful for teams running tight pH windows — any technician checking the display immediately knows a value is out of range without reading the number. The dual display shows pH and temperature simultaneously. Battery life is rated up to 1,000 hours of continued use on four AAA batteries (included), and the 8-minute auto-power-off preserves battery between checks.
The AI311 kit ships complete and ready to calibrate out of the box: PH60 tester, three premixed pH buffer solutions (4.00, 7.00, 10.01), 3M KCl storage solution, calibration bottles, AAA batteries, lanyard, and a rugged portable carrying case. There is nothing additional required to begin taking calibrated measurements the same day it arrives.
The included probe (PH60-E) is field-replaceable — when the electrode ages out after 1–2 years of regular use, you replace the probe only, not the entire meter body. The meter body is also compatible with three additional probe types and a separate ORP probe (sold separately), which extends the tool's usefulness into ORP monitoring and surface or solid-sample testing if needed. CE certified. 2-year manufacturer warranty on the instrument; 6-month warranty on the probe. Not recommended for measuring distilled or deionized water without first adding a small amount of the included 3M KCl solution to the sample.
| Brand / Model | Apera Instruments PH60 (AI311) |
| pH Measurement Range | −2.00 to 16.00 pH |
| pH Resolution | 0.01 pH |
| pH Accuracy | ±0.01 pH (±1 digit) |
| Temperature Accuracy | ±0.5°C |
| ATC Range | 0–50°C (32–122°F) |
| Calibration Points | 1, 2, or 3-point auto-calibration; recognizes 5 buffer types (1.68, 4.00, 7.00, 10.01, 12.45) |
| Waterproof Rating | IP67 (floatable) |
| Auto Power-Off | 8 minutes without operation |
| Warranty | 2 years (instrument) / 6 months (probe) |
The kit includes everything needed to calibrate and start measuring immediately: three premixed pH buffer solutions (pH 4.00, 7.00, and 10.01), 3M KCl storage solution, calibration bottles, AAA batteries, a lanyard, and a portable carrying case. Nothing extra is required.
Yes — the probe is field-replaceable. Apera recommends replacing the PH60-E probe every 1–2 years depending on use frequency and sample conditions. The meter body is reused; you purchase a replacement probe only, which is significantly more cost-effective than replacing the full meter.
Yes. The PH60 carries an IP67 waterproof and dustproof rating, meaning it is rated for full submersion up to 1 meter for 30 minutes. The body is also designed to float, so an accidental drop into a reservoir or water tank will not damage or lose the meter.
The PH60 is not recommended for direct measurement of pure distilled or deionized water. For low-ion-strength samples like RO water, adding a few drops of the included 3M KCl storage solution to the sample will significantly improve stabilization speed without affecting the pH reading. For pure DI water testing, Apera offers a specialized meter (SX811-PW) designed for that application.
Users can set upper and lower pH alert thresholds on the meter. When a reading falls outside those limits, the display backlight turns red automatically. This allows any team member checking the meter to immediately recognize an out-of-range reading without needing to interpret the specific number — a useful quality-control feature in multi-technician grow operations.
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