Product details
Viscous Liquid pH Probe — Anti-Clogging Design
The InstroDirect IDH-J204-V Viscous Liquid pH Probe – Anti-Clogging is a specialised pH electrode engineered for viscous process liquids — honey, syrups, slurries, thick emulsions, and semi-solid food products — where standard electrodes clog within hours. Features an open-junction ceramic diaphragm with a larger-than-standard opening that resists fouling by viscous media.
Technical Specifications
| Parameter | Specification |
|---|---|
| Measuring range | 0 – 14 pH |
| Temperature range | 0 – 100 °C |
| Max Pressure | 6 Bar |
| Bulb Type | High alkali resistant glass |
| Reference type | Pre-pressurised gel reference |
| Outer Salt Bridge | Ceramic hole |
| Reference solution | Gel |
| Temperature Sensor | PT1000 |
| Interface Type | Cab, VP6, S8 |
| Electrode length | 120 mm |
| Mounting Thread | PG13.5 |
Typical Australian Applications
- Honey and syrup production
- Yoghurt and fermented dairy
- Sauce and condiment manufacture
- Slurry pH control
- Emulsion-based food products
- Thick industrial slurries
Why Engineers Choose the IDH-J204-V
- Large-aperture junction stays open where standard ceramic diaphragms clog within hours
- PEEK bulb guard prevents mechanical damage from viscous stream forces
- FDA-grade wetted materials for direct food contact
- Eliminates daily cleaning cycles required for standard electrodes in viscous service
Installation & Calibration
Install in a point of known flow velocity (> 0.1 m/s) if possible. Static pockets allow residue buildup even on large-aperture junctions.
Frequently Asked Questions
Can this handle tomato paste?
Yes at < 20% solids. For very high-solids pastes a robust inline colorimetric pH method may give longer service life.
Australian Technical Support & On-Site Calibration
- Australian field engineers with 20+ years of industrial automation experience — phone and email support during AEST business hours.
- On-site pH calibration service across QLD, NSW, VIC — two-point buffer calibration (pH 4 / 7 / 10) with formal calibration certificate.
- Sensor health diagnostics — slope, offset, glass impedance, and reference junction checks.
- Replacement electrodes and buffer solutions available from InstroDirect’s broader water-analysis range.
Why InstroDirect vs Endress+Hauser or HACH in Australia
InstroDirect supplies the same grade of pH sensor that Australian councils, WWTP integrators, pharma plants, and food & beverage operators specify from Endress+Hauser (CPS11D, CPS31D, CPS41D, CPS71D) and HACH (pHD, Differential pH) — at a significantly lower landed cost and without vendor lock-in.
| Factor | InstroDirect | Endress+Hauser / HACH |
|---|---|---|
| Digital protocol | Open RS485 Modbus RTU — integrates with Allen-Bradley, Siemens, Schneider, Beckhoff, or any SCADA | Proprietary Memosens / HACH SC — locked to the vendor’s transmitter |
| Technical support | Australian field engineers with 20+ years automation experience | Offshore ticket queue or authorised distributor |
| On-site calibration | InstroDirect service across QLD, NSW, VIC with formal certificate | Third-party authorised service network, longer turnaround |
| Price | Parallel-import, no distributor margin stack — typically 30–50% below equivalent E+H / HACH pricing | Premium brand with distributor markup |
| Replacement parts | Standard glass-bulb and reference cartridges | Proprietary Memosens head, tied to the brand |
Moving away from Memosens or SC digital protocols frees you to mix and match sensors with any Modbus-capable transmitter or PLC. InstroDirect pH electrodes drop straight into an existing control system without a new proprietary transmitter.
Request a Trade Quote
Panel builders, integrators, council water departments, and pharma/process teams get volume trade pricing. Submit a quote request and we’ll respond within one business day.
