Swiss LabSen 333 electrode — accurate pH in wastewater, slurries, suspensions, and emulsions without junction clogging.
The Apera PH700-WW (AI5012) is a benchtop pH meter purpose-built for dirty, particulate-heavy liquid samples — wastewater, suspensions, emulsions, and slurries — that clog and contaminate standard glass-junction electrodes. Paired with the Swiss-engineered LabSen 333 open-junction pH/Temp electrode, it delivers ±0.01 pH accuracy across the full 0–14 pH range with automatic temperature compensation and on-board data storage.
The Apera PH700-WW (SKU: AI5012) is a dedicated benchtop pH meter for sample matrices that destroy standard electrodes. Turbid water, particulate-laden runoff, nutrient slurries, organic emulsions, and wastewater effluent all share one problem: they clog the ceramic or fiber junctions found on conventional pH probes, fouling the reference system and producing drift. The PH700-WW solves this at the electrode level.
The included Swiss LabSen 333 3-in-1 pH/Temp electrode uses an open-junction, polymer solid-electrolyte design with a POM (polyoxymethylene) body that is highly resistant to corrosion. The polymer electrolyte ensures full contact with the test sample while eliminating junction clogs — and unlike standard gel or liquid-filled references, it requires no electrolyte refill. The long-life reference system is composed of a glass tube, AgCl, and a reference silver wire with a cotton-stuffed tip to stabilize the AgCl/electrolyte interface as temperature changes, extending service life. The hemispherical LabSen blue glass membrane delivers fast response and strong resistance to mechanical impact.
Any commercial or licensed cultivation operation running analytical QC on complex water samples will find this meter relevant. Think post-treatment effluent verification before discharge, pH tracking in coco/peat slurry fertigation mixing, nutrient solution quality checks on emulsified additives, or incoming water testing where sediment load makes standard electrodes unreliable.
It is also a practical tool for labs processing soil extracts, tissue-digestion samples, or other suspended-solids matrices where particulate contamination of a conventional junction would mean frequent electrode replacement and unreliable readings. The LabSen 333 electrode is rated for wastewater, effluents, turbid water solutions, detergents, liquid soaps, salt water, phosphate buffers, and general water solutions — making it one of the broadest-application electrodes in the PH700 line. The IP54-rated enclosure handles spills and bench dust without degradation, appropriate for wet lab and processing environments.
Calibration is 1–3 point automatic with buffer auto-recognition. The meter recognizes standard pH buffers (1.68, 4.00, 7.00, 10.01, 12.45) and performs self-diagnosis with electrode condition display at the end of each calibration cycle, so operators can confirm probe health before taking measurements — no guessing whether a reading is drifting because the sample is odd or because the electrode is degraded.
Max/Min reading mode captures the peak and trough values recorded during a measurement period, useful when pH is moving dynamically — during a mix cycle, a carbon dioxide flush, or a titration step. Fifty data sets can be stored on-board with measurement number, unit, temperature reading, and ATC status logged per record. Automatic Temperature Compensation (ATC) runs 0–100 °C and engages via the built-in NTC temperature sensor in the LabSen 333 electrode. The electrode holder accommodates up to two electrodes simultaneously. The kit ships complete and ready to calibrate: electrode, holder, and three 50 mL bottles of pre-mixed pH calibration solution (pH 4.00, 7.00, and 10.01).
For cultivation teams managing large-scale fertigation, effluent quality, or post-harvest processing, the PH700-WW fills a specific gap: measuring pH in the sample types that eat through a standard $80 pen meter electrode in weeks. Coco runoff, nutrient emulsions, organic amendment teas, and stabilization pond effluent all carry enough particulate or organic load to clog a ceramic junction rapidly. The LabSen 333 open-junction design handles those matrices as its primary use case, not as an edge case.
The benchtop form factor — stable, calibrated, with on-board data logging — also suits compliance sampling workflows where traceability matters. Stored readings with temperature and ATC status provide a basic audit trail that a portable pen tester cannot. Replacement LabSen 333 electrodes are available as a standalone part, so the meter body does not need to be replaced when the probe reaches end of service life (Apera recommends electrode replacement after approximately one year of regular use).
| SKU | AI5012 |
| Model | PH700-WW |
| pH Measuring Range | 0–14.00 pH |
| pH Resolution | 0.1 / 0.01 pH |
| pH Accuracy | ±0.01 pH |
| Temperature Compensation | 0–100 °C, Automatic (ATC) or Manual (MTC) |
| Calibration | 1–3 point auto; recognizes pH 1.68, 4.00, 7.00, 10.01, 12.45 |
| Data Storage | 50 data sets (pH value, temp, ATC status, unit) |
| Ingress Protection | IP54 (spill-proof and dust-proof) |
| Electrode Included | LabSen 333 3-in-1 pH/Temp — open junction, polymer electrolyte, POM body, BNC/RCA connector; pH 0–14, Temp −5 to 80 °C |
| Electrode Body Material | POM (polyoxymethylene) — corrosion-resistant |
| Reference System | Long-life AgCl / glass tube / reference silver wire; no electrolyte refill required |
Standard pH electrodes use a ceramic or fiber junction that allows a small flow of reference electrolyte into the sample to maintain electrical contact. In dirty or particulate-heavy samples — wastewater, slurries, suspensions — those junctions clog, the reference potential drifts, and readings become unreliable. The LabSen 333 electrode uses an open-junction, polymer solid-electrolyte design that makes direct contact with the sample without a porous junction to clog, eliminating that failure mode.
No. The LabSen 333 uses a solid polymer electrolyte — there is no liquid to top off. The electrode requires no electrolyte refill throughout its service life. Apera recommends replacing the electrode after approximately one year of regular use to maintain best accuracy.
The meter auto-recognizes five standard pH buffers: pH 1.68, 4.00, 7.00, 10.01, and 12.45. The kit ships with pre-mixed 50 mL bottles of pH 4.00, 7.00, and 10.01. Calibration can be performed at 1, 2, or 3 points depending on the required accuracy range. After each calibration the meter performs a self-diagnosis and displays electrode condition.
Yes. The LabSen 333 uses a BNC/RCA connector and is compatible with Apera meters that share that connector type, including the PH910, PH9500, PH850, PC8500, and PH820. If you have an existing compatible meter body you can order the LabSen 333 electrode as a standalone replacement part.
The PH700-WW handles both. The LabSen 333 is rated for general water solutions including hydroponics, pools, and environmental monitoring in addition to its primary dirty-liquid applications. For clear nutrient solutions the open-junction design performs comparably to a standard electrode. Its main advantage emerges when the sample contains particulates, emulsified oils, sulfides, or other materials that degrade conventional junctions — common in drainage water, slurry-based amendments, or effluent from anaerobic processes.
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