Lab-grade wastewater pH measurement in a field-ready, IP57-rated housing with GLP data logging.
The Apera PH8500-WW (AI5559) is a professional portable pH meter purpose-built for wastewater, emulsions, effluents, and turbid solutions containing sulfides or proteins — the exact matrix conditions that clog and foul standard electrodes. Paired with the Swiss-engineered LabSen 333 POM 3-in-1 electrode, it delivers ±0.01 pH accuracy with 500-set GLP data logging and USB output in an IP57-rated field-ready body.
The Apera PH8500-WW is a Premium Series portable pH meter designed specifically for measuring pH in wastewater, emulsions, effluents, slurries, and other turbid water solutions that contain sulfides and proteins — the types of complex matrices common in cultivation runoff, fertigation drain-to-waste streams, and reservoir water with high organic load. Standard glass-bulb electrodes routinely fail or read inaccurately in these environments due to junction clogging. The PH8500-WW is engineered to solve that problem at the instrument and electrode level.
The meter ships as a complete kit under SKU AI5559. It comes paired with the Apera LabSen 333 POM-body 3-in-1 pH/Temperature Electrode — a Swiss-technology sensor that replaces the conventional fragile glass bulb and liquid electrolyte junction with a POM polymer housing, solid polymer electrolyte, and an open-junction double-pore structure. The result is a sensor that stays in contact with the test sample without clogging, and that doesn't require electrolyte refilling in the field.
Licensed cannabis and hemp cultivation operators running recirculating systems, drain-to-waste tables, or large-scale fertigation infrastructure deal with test conditions — high organic load, suspended solids, protein content, sulfide-containing solutions — that eat standard pH probes. The PH8500-WW is the right tool for runoff pH checks on coco, rockwool, or living soil systems, as well as for reservoir management and water treatment compliance testing where accurate, repeatable, documented pH data is non-negotiable.
The GLP-compliant 500-set data logger with USB output makes this meter viable wherever traceability is required — state compliance audits, SOPs with documented fertigation records, or multi-site operations that need verifiable logs rather than manually transcribed readings. The foldable stand lets it double as a benchtop unit in the grow lab when field portability isn't needed, removing the need for a separate instrument.
The LabSen 333 is the core differentiator of this kit. Built with Swiss sensor technology and materials, it uses a solid polymer electrolyte and an open-junction double-pore structure that keeps direct contact with test samples while eliminating the junction clogs that disable standard KCl-liquid electrodes in turbid or high-protein solutions. The POM (polyoxymethylene) electrode body is chemically resistant to corrosion, making it durable in the harsh environments common in commercial grows and wastewater streams.
The electrode's long-life reference system — a glass tube with AgCl and a reference silver wire, cotton-packed at the top to prevent AgCl-electrolyte reaction during temperature changes — stabilizes the reference potential and extends service life compared to conventional designs. The unique blue hemispherical glass membrane provides faster response rate and better impact resistance than fragile conventional glass bulb membranes. A built-in NTC 30kΩ temperature sensor feeds automatic temperature compensation (ATC) in real time.
The PH8500-WW meter offers 1–3 point automatic calibration with auto-recognition of up to 12 standard buffer solutions, automatic temperature compensation, and both stable-reading and auto-hold display modes. The smart self-diagnosis system flags out-of-range measurements, electrode invalidation, incorrect calibration, and prompts calibration reminders with date-checking — reducing operator error in high-throughput environments.
The meter's physical design is built for field conditions: an IP57-rated waterproof and dustproof rating, a soft silicone grip case, a large white backlit LCD readable in dim grow environments, and AAA battery power for untethered use across a facility. The foldable stand converts it to a benchtop configuration for lab or head-house use. ORP measurement is supported when paired with a compatible ORP electrode (sold separately). The 3-year instrument warranty and 6-month probe warranty are backed directly by Apera Instruments.
| Model | PH8500-WW |
| SKU | AI5559 |
| pH Range | 0–14 pH |
| pH Accuracy | ±0.01 pH |
| Temperature Range | –5 to 80°C (23 to 176°F) |
| Calibration | 1–3 point auto, recognizes up to 12 buffer solutions |
| Data Storage | 500 sets, manual/auto; USB data output; GLP standard |
| Electrode | LabSen 333 POM 3-in-1 pH/Temp — polymer electrolyte, open junction, hemispherical blue glass membrane, NTC 30kΩ temp sensor, 120mm × 12mm, BNC/RCA connector |
| Ingress Protection | IP57 (waterproof and dustproof) |
| Power | AAA batteries |
| Warranty | 3 years (instrument) / 6 months (probe) |
Standard glass-bulb electrodes with liquid KCl electrolyte junctions are prone to clogging when tested against turbid water, solutions with high organic content, proteins, or sulfides — all of which are common in commercial cultivation runoff and reservoir water. The LabSen 333 electrode's solid polymer electrolyte and open double-pore junction maintain direct contact with complex samples without clogging, which is why the PH8500-WW is purpose-built for these matrix conditions.
GLP (Good Laboratory Practice) data management logs up to 500 pH measurement sets with timestamps. Readings can be stored manually or automatically and exported via USB to a computer for record-keeping, SOP documentation, or compliance files. For licensed operators running documented fertigation protocols or preparing for state inspections, having a digital log is significantly more reliable and auditable than handwritten notes.
Yes — the PH8500-WW supports ORP measurement, but requires a compatible ORP electrode such as the Apera 301Pt-C, which is sold separately. The LabSen 333 electrode included in this kit is a pH/temperature electrode only.
No. The solid polymer electrolyte design eliminates the need for electrolyte refilling — a meaningful advantage in field use or high-throughput testing environments. When not in use, the electrode should be stored in 3M KCl solution to keep the polymer electrolyte properly conditioned.
Yes. The PH8500-WW includes a foldable stand that converts it to a stable benchtop configuration, so the same instrument can serve both field sampling throughout the facility and fixed lab-station testing — eliminating the need for two separate meters.
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