Product details
Hydrofluoric Acid (HF) Resistant pH Electrode
The InstroDirect IDH-J202-HF HF-Resistant pH Electrode – Hydrofluoric Acid Proof is a specialised HF-resistant pH electrode designed for processes containing hydrofluoric acid that destroys standard glass electrodes within hours. Uses an HF-resistant glass formulation (typically antimony or HF-tolerant specialty glass) with PEEK body and PTFE-lined wetted parts.
Technical Specifications
| Parameter | Specification |
|---|---|
| Measuring range | 0 – 11 pH |
| Temperature range | 0 – 80 °C |
| Max Pressure | 6 Bar |
| Bulb Type | Hydrofluoric acid resistant glass |
| Reference type | Silver ion capture trap |
| Outer Salt Bridge | Open salt bridge |
| Reference solution | Solid polymer |
| Temperature Sensor | PT1000 (S8 interface without temperature sensor) |
| Interface Type | Cab, VP6, S8 |
| Electrode length | 120 mm |
| Mounting Thread | PG13.5 |
Typical Australian Applications
- Semiconductor fab HF-containing process water
- Metal pickling (HF-containing pickle baths)
- Glass and ceramic etching
- Uranium processing
- Any process with HF concentration > 10 ppm
Why Engineers Choose the IDH-J202-HF
- Standard glass bulbs etch within 8–72 hours in HF; this electrode survives 3–12 months
- PEEK body resists HF attack where stainless is consumed
- PTFE-lined reference prevents HF intrusion into the Ag/AgCl system
- Specialised application with very few suppliers in Australia
Installation & Calibration
Install in a PEEK or PTFE-lined fitting. Standard 316 SS fittings will be destroyed by HF. Replace on schedule even if readings look normal — HF degradation is non-linear.
Frequently Asked Questions
What HF concentration can this handle?
Continuous exposure up to 5% HF. Above 10% HF consider reagent-based F- analyzer as an alternative measurement method.
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.
