Product details
PEEK-Bodied High-End Industrial pH Sensor
The InstroDirect IDH-500T High-End Industrial pH Sensor – PEEK Body, Extreme Chemistry is an all-PEEK bodied industrial pH sensor engineered for extreme chemistry applications — strong acids, caustics, solvents, semiconductor process water, and pharma ultra-pure water where stainless steel is corroded and standard glass electrodes fail within weeks. Triple-junction reference, FFKM O-rings, rated to 130 °C.
Technical Specifications
| Parameter | Specification |
|---|---|
| Measuring range | 0 – 14 pH |
| Temperature range | 0 – 130 °C |
| Pressure range | 0 – 5 Bar |
| Temperature compensation | NTC10K, NTC30K, NTC2.252K, PT100, PT1000 can be customised |
| Response time | ≤ 10 s |
| Factory slope | ≥ 95% |
| Zero potential | ± 10 mV |
| Reference type | Double salt bridge reference |
| Reference material | Ag/AgCl |
| Reference electrolyte | Industrial Gel |
| Salt Bridge | Ceramic sand core |
| Membrane resistance | < 250 MΩ |
| Mounting Thread | Upper and lower 3/4″ NPT pipe threads |
| Shell material | Glass |
| Length | 125 mm |
| Cable Connection | Integrated direct connection |
Typical Australian Applications
- Concentrated sulphuric and nitric acid processes
- Strong caustic (NaOH) neutralisation
- Pharma WFI and purified water loops
- Semiconductor ultra-pure water
- Halogenated chemical process
Why Engineers Choose the IDH-500T
- PEEK handles concentrated acids and solvents that destroy stainless and glass-filled plastics
- FFKM O-rings survive chemistries that destroy EPDM and FKM
- 130 °C rating covers steam sanitisation and hot chemical service
- Solid-polymer reference bridge resists chemical attack on the reference junction
Installation & Calibration
Use PEEK-lined or PTFE-lined process fittings to maintain chemical compatibility at the joint.
Frequently Asked Questions
Can this measure HF acid?
No — HF attacks the glass bulb. For HF service use the IDH-J202-HF hydrofluoric-acid-proof electrode.
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.
