Premium Series PH8500 Portable pH Meter with Temperature Probe Only with GLP Data Logger

What the PH8500-A Is

The Apera PH8500-A is the temperature-probe-only configuration of Apera's PH8500 Premium Series portable pH meter platform. The meter body provides ±0.01 pH accuracy across a –2.00 to 16.00 pH measurement span, with a resolution of 0.01 pH. Automatic temperature compensation runs from 0 to 100°C, driven by the included MP500 temperature probe — a stainless-steel probe with a 30K thermistor sensor covering –10 to 110°C via an RCA connector.

Because the PH8500-A ships with the temperature probe rather than a bundled combination electrode, operators who already run Apera's LabSen electrode line — or who need a specific electrode for their media type — can pair this meter with the right sensor for their application. The universal BNC connector is fully compatible with Apera's LabSen Professional Series, and the meter also supports ORP measurement when paired with an optional ORP electrode.

Who This Meter Is Built For

Any commercial cannabis or hemp cultivation operation running structured nutrient programs needs reproducible, documentable pH data — not just a ballpark reading from a consumer pen tester. The PH8500-A is the right tool for head growers and cultivation managers who pull daily feed solution readings, verify runoff pH across multiple rooms or tables, and need those records in a format that survives a state compliance audit or internal QC review.

The GLP (Good Laboratory Practice) data management system stores up to 500 measurement sets with timestamps, which can be pulled via USB to a PC through Apera's cross-platform web-based PC-Link software — no driver installation required, works in Chrome, Edge, or Firefox. For multi-site operators or groups with SOPs that require documented calibration history, the meter's calibration-date logging and smart calibration reminders keep recordkeeping on track without adding administrative overhead.

Key Features for Cultivation Environments

The PH8500-A is IP57 waterproof and dustproof, meaning it handles the wet, humid, and chemical-splash conditions common in commercial fertigation rooms and mixing stations without flinching. A soft silicone grip cover protects the body from impact, and the large backlit LCD simultaneously displays pH and temperature so you're reading both parameters on a single glance. A foldable stand converts the unit to a benchtop-style position when you're working at a mixing station or nutrient prep area.

Calibration is automatic: the meter recognizes up to 12 standard buffer solutions, including pH 1.68, 4.00, 7.00, 10.01, and 12.45, and supports 1- to 3-point auto-calibration with calibration record review. The built-in Smart Self-Diagnosis actively flags out-of-range measurements, incorrect calibration, and electrode invalidation — surfacing probe issues before they corrupt a batch of data or, worse, a room of plants. Auto-hold and stable-reading display modes lock readings when the measurement stabilizes, reducing user error on fast-check workflows.

How It Fits a Commercial Cultivation Build

In a commercial grow, pH drift at the reservoir or at the root zone is one of the fastest ways to lock out nutrients and lose yield — and it's entirely preventable with consistent, calibrated measurement. The PH8500-A sits at the intersection of field portability and lab-grade data integrity: it goes room to room like a pocket pen tester, but logs timestamped, GLP-standard data like a bench instrument.

The meter's BNC connector flexibility matters at scale. If your operation uses multiple media types — for example, coco-based systems in one room and recirculating DWC in another — you can run a single PH8500-A meter body with different LabSen electrodes optimized for each environment rather than purchasing separate dedicated meters. Pair it with Apera's calibration buffer solutions and storage solution for a complete daily-calibration workflow. Backed by Apera's 3-year instrument warranty and 6-month probe warranty.