Lab-grade pH accuracy in a field-ready, IP57-rated package with GLP data logging and USB output.
The Apera PH8500 (AI5520) is a Premium Series portable pH meter designed for lab-grade measurement in harsh field environments — IP57 waterproof, ±0.01 pH accuracy, and 500-set GLP data storage with USB output. Purpose-built for operators who need documented, reliable pH data across nutrient systems, fertigation lines, and water sources.
The Apera PH8500 is a handheld, field-grade pH meter designed to deliver laboratory accuracy outside of lab conditions. At its core is the 201T-F 3-in-1 electrode — a combination pH, temperature, and ATC probe built with Apera's proprietary lithium glass membrane. That membrane is formulated for fast response and consistent accuracy in general aqueous solutions, which covers everything from source water and RO runoff to mixed nutrient feed and fertigation lines.
The meter body is wrapped in a silicone grip cover and rated IP57 — fully dustproof and submersion-resistant — so an accidental drop in a reservoir or a spray-down cleaning cycle won't put it out of commission. The large backlit dual-line LCD shows pH (or mV), temperature, and live stability and calibration status indicators simultaneously, so you're not guessing whether a reading has settled. A foldable stand on the back lets it serve double duty as a benchtop meter when bench space is available.
Any licensed cannabis or hemp operation running a hydroponic, coco, or fertigation program needs verifiable pH data at multiple points in the system — source water, mixed nutrient feed, runoff, and flush solution. The PH8500 is built for that workflow. It's accurate enough to catch the 0.2–0.3 pH drift that can quietly push a feed outside the optimal uptake window, and rugged enough to handle daily use on a wet floor.
The GLP data management system — 500 stored data sets with time/date stamps, exportable via USB — matters most for operators under state compliance programs that require documented environmental monitoring logs, or for any cultivation team that wants traceability when diagnosing a nutrient problem after the fact. The meter also supports ORP measurement via a separately sourced 301Pt-C electrode, which adds value for operations monitoring oxidation-reduction potential in irrigation or treatment systems.
Calibration: Auto 1–3 point with automatic buffer recognition for pH 1.68, 4.00, 7.00, 10.01, and 12.45 standards. A built-in self-diagnosis function flags calibration errors and electrode condition issues before they result in bad data. Calibration reminders and last-calibration review keep the meter honest over time without relying on the operator to remember.
Electrode: The included 201T-F uses Apera's lead-free lithium glass membrane — a low-resistance formulation that speeds response time and maintains accuracy in standard aqueous nutrient solutions. The universal BNC connector means the meter is also compatible with the full Apera LabSen professional electrode series if you need a specialty probe (soil, high-salinity, ORP, semi-micro) for any part of your operation.
Data: 500-set GLP memory with automatic or manual logging. Connect via USB to a PC for real-time data capture or to export stored records. The included software flash drive enables direct export for reporting or integration into grow records. The meter also displays time and date, so logged readings are time-stamped without additional effort.
In a multi-room or multi-tier facility, pH drift in one zone's header tank can go unnoticed for hours if technicians are relying on a cheap pocket tester with no data trail. The PH8500 gives you a documented chain of custody for pH measurements — time-stamped, storable, and exportable — so you can cross-reference readings against a crop event (flush, feed change, new batch of concentrate) and pinpoint when and where a problem started.
The IP57 housing and silicone-protected BNC/USB sockets mean the meter stands up to the cleaning protocols and humidity levels typical in commercial grow rooms without needing a protective case between every use. The foldable stand allows it to sit on a mixing bench for hands-free nutrient prep verification, and the AAA battery power keeps it off a charge cycle so it's available when you need it. For operations expanding canopy or adding rooms, this is a single-unit pH solution that scales with your team without requiring one meter per room.
| Model | PH8500 |
| SKU | AI5520 |
| pH Range | 0.00 – 14.00 pH |
| pH Resolution | 0.01 / 0.1 pH |
| pH Accuracy | ±0.01 pH ±1 digit |
| Temperature Compensation | Automatic (ATC), built into 201T-F electrode |
| Calibration | Auto 1–3 point; recognizes pH 1.68, 4.00, 7.00, 10.01, 12.45 |
| Data Storage | 500 sets GLP, USB data output |
| Waterproof Rating | IP57 |
| Electrode | 201T-F 3-in-1 pH/Temp, lithium glass membrane, BNC connector |
| ORP Capability | Yes — requires 301Pt-C electrode (sold separately) |
| Power | AAA batteries |
The AI5520 ships with the 201T-F 3-in-1 pH/temperature electrode. It uses Apera's proprietary lead-free lithium glass membrane and is designed for general aqueous solutions — nutrient feed, RO water, fertigation runoff, buffer solutions, and similar water-based samples. It is not intended for strong acid, hydrofluoric acid, or high-salinity solutions; Apera makes specific PH8500 variants with specialty electrodes for those applications.
Yes. The PH8500 has a universal BNC connector that is fully compatible with Apera's LabSen professional electrode series. This includes electrodes for soil, strong alkaline/high-salinity solutions, micro-sample test tubes, and ORP measurement (301Pt-C). This makes the meter body a long-term platform rather than a single-application tool.
The meter stores up to 500 measurement sets with time and date stamps in GLP (Good Laboratory Practice) format — manually triggered or set to auto-log. To export, connect the meter to a PC via the included USB cable and use the included software flash drive. Data can be pulled for real-time monitoring or to export stored records for reporting, compliance documentation, or batch analysis.
Calibration frequency depends on use intensity, sample variability, and how critical your precision tolerance is — daily calibration is standard practice for most commercial cultivation workflows. The PH8500 has a built-in calibration reminder function and allows you to review the date of the last calibration directly on the meter. The self-diagnosis function will flag electrode condition issues or out-of-range calibration results before they contaminate your data.
Yes. The IP57 rating means the meter is fully dustproof and can withstand temporary submersion. The silicone grip cover and protected BNC and USB sockets are designed to handle the humidity, splashing, and incidental contact with water that are typical in greenhouse and indoor cultivation environments. The foldable stand also allows hands-free benchtop use when working at a mixing station.
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