Whether you need a replacement pH electrode for a benchtop meter, a rugged submersible probe for outdoor water quality monitoring, or a precision amplified sensor for a continuous process control system, Pacific Sensor Tech has the right solution. Our range of pH probes and electrodes covers industrial, environmental, and laboratory applications across Australia.
All probes are available with standard BNC connectors for compatibility with most pH meters and data loggers. Our Milwaukee Instruments and MadgeTech pH probes are backed by full technical support and our NATA-accredited calibration service — ensuring your measurements are traceable and compliant.
Not sure which pH probe you need? Call our technical team on 1300 662 720 or browse our pH Meters range for a complete measurement solution.
pH Probes & Electrodes for Every Application Whether you need a replacement pH...
Double junction pH electrode with 1 meter cable a…
Combined pH electrode with free diffusion layer j…
Double junction, gel filled pH electrode with BNC…
Refillable Glass pH electrode with BNC connector<...
Combined Epoxy pH electrode, with BNC connector a…
pH/Temp amplified probe with 1 meter cable (Mi105…
pH glass electrode with 2 meter cable
Combined glass pH electrode, refillable, BNC conn…
Combined glass pH electrode, double junction, ref…
Combined glass pH electrode with 3 Diaphrams, dou…
Glass pH electrode (for Mi456 Mini Titrator)
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pH/ORP/Temp amplified probe with 1 meter cable, D…
Combined glass pH electrode with BNC connector, 1…
Submersible pH electrode suited for outdoor appli…
Selecting the correct pH electrode for your application comes down to five key factors:
Modern pH measurement uses combination electrodes that integrate both the measuring and reference half-cells into a single probe body. Here are the main types:
| Type | Construction | Best For | Example Products |
| Single Junction, Gel-Filled | Sealed gel electrolyte, one junction | Lab samples, clean aqueous solutions | MA913B, MA991B |
| Double Junction, Gel-Filled | Two-junction barrier prevents contamination | Protein, heavy metal, or coloured samples | SE220, MA911B/2 |
| Single Junction, Refillable Glass | Replenishable electrolyte, glass body | High accuracy lab measurements | MA916B |
| Double Junction, Refillable Glass | Max contamination resistance + refillable | Industrial process, wastewater | MA917B, MA918B, MA919B |
| Amplified Combination Probe | Integrated pH/ORP/Temp sensor + preamp | Data loggers, continuous monitoring | MA914BR, MA923D |
| Rugged Submersible | IP-rated epoxy body, tethered cable | Outdoor, environmental, field use | MadgeTech pH-Rugged |
The terms are used interchangeably in most contexts. Technically, a pH electrode refers to the glass measuring element, while a pH probe often describes the complete assembly including the body, junction, cable, and connector. All products on this page are complete combination probes ready for immediate use.
Lifespan varies by type and usage. Gel-filled electrodes typically last 12–18 months with regular use. Refillable glass electrodes can last 2–5 years when properly maintained and stored in the correct electrode storage solution. Rugged epoxy probes in industrial environments typically last 1–3 years.
pH probes should be calibrated before each use or at a minimum daily for critical measurements. Use standard buffer solutions at pH 4.01, 7.00, and 10.0. Pacific Sensor Tech stocks a full range of calibration solutions, and our NATA-accredited calibration service can verify your probe against traceable standards.
All probes with a BNC connector are compatible with any pH meter or data logger that has a BNC input — including all Milwaukee Instruments meters and MadgeTech data loggers. The amplified probes (MA914BR/1, MA923D/1) require a compatible Milwaukee meter. Contact our team on 1300 662 720 if you need compatibility confirmation.
Yes. The MadgeTech pH-Rugged Electrode is specifically designed for submersible outdoor environmental monitoring. The double junction electrodes in our Milwaukee range are also well-suited to wastewater and process water applications where contamination of the reference junction is a concern.
Yes. Pacific Sensor Tech operates a NATA-accredited calibration laboratory in Pakenham, Victoria. We offer on-site calibration services across Australia and return calibration via our repair and calibration portal. Contact us for a quote.
