Product details
Stainless Steel 4-Electrode Conductivity Sensor — Industrial
The InstroDirect IDC-4E-SS Stainless 4-Electrode Conductivity Sensor is a heavy-duty four-electrode conductivity probe with a 316 stainless body and slotted protective cage, built for industrial applications that demand both chemical resistance and tolerance to fouling. Ideal for pickling baths, plating lines, CIP return, and high-TDS cooling water.
Technical Specifications
| Parameter | Specification |
|---|---|
| Measurement parameters | Conductivity, temperature |
| Measurement method | Four-wire graphite electrode method |
| Range | Conductivity: 0 – 200 mS/cm |
| Accuracy | ≤ ±1% |
| Repeatability | ≤ 1% |
| Resolution | 0.01 µS/cm |
| Response time | ≤ 20 s |
| Drift | ≤ ±1% F.S. |
| Temperature compensation accuracy | ≤ ±1% F.S. |
| Temperature range | 0 – 60 °C |
| Protection level | IP68 |
| Communication | RS485 Modbus RTU, max baud 115200 bps |
| Power supply / Consumption | 12 / 24 VDC, < 0.3 W |
| Material | Titanium alloy, stainless steel, POM |
| Size | 162 mm × Φ 28 mm |
Typical Australian Applications
- Metal finishing: pickling and plating baths
- High-TDS cooling water (>5000 ppm)
- CIP caustic and acid return lines
- Brine production and salt dosing
- Mining process water
Why Integrators Choose the IDC-4E-SS
- 4-electrode design tolerates fouling that kills 2-electrode probes
- 316 stainless resists both chlorides and weak acids/bases
- Slotted cage prevents mechanical damage while keeping flow over the electrodes
- 0–2000 mS/cm range covers concentrated industrial chemistries
- Threaded NPT mount fits standard plant pipework
Installation & Calibration Notes
Install through a 3/4″ NPT boss with electrodes fully submerged. For high-fouling service, inspect and wipe the cage clean monthly. Recalibrate with 111.8 mS/cm KCl standard at the top of the range every 1–3 months.
Frequently Asked Questions
Will this work in plating baths?
Yes for most chloride, sulphate, and phosphate baths. For chrome or cyanide baths, confirm chemistry with us before ordering.
How do I clean the electrodes?
Soak in 1:10 dilute HCl for 5 minutes to remove scaling; rinse with DI water. For organic fouling, use a neutral detergent soak and soft brush.
What cell constant suits different ranges?
K=0.6 covers 0–2000 mS/cm accurately. For lower ranges (<20 mS/cm) choose a 2-electrode K=1.0 probe for better low-end resolution.
Australian Technical Support, Calibration & Consumables
- Phone and email technical support from Brisbane-based field engineers with 20+ years automation experience
- On-site two-point conductivity calibration across QLD, NSW, VIC with certificate of calibration
- Next-day delivery across Australia for ; trade pricing from 5 units
InstroDirect also stocks the full water-analysis reagent range for pH, dissolved oxygen, chlorine, ammonia, and nitrate monitoring.
Request a Trade Quote
Panel builders, system integrators, council water departments, food & beverage engineers, and pharma/process teams get volume trade pricing. Submit a quote request and we’ll respond within one business day with stock, pricing, and lead time.
Why InstroDirect vs Endress+Hauser or HACH in Australia
InstroDirect supplies the same grade of water-quality sensor that Australian councils, WWTP integrators, pharma plants, and food & beverage operators specify from Endress+Hauser and HACH — 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 (E+H Memosens / HACH SC digital) — locked to the vendor’s transmitter |
| Technical support | Australian field engineers with 20+ years automation experience | Remote support via offshore ticket queues |
| On-site calibration | InstroDirect technicians available across QLD, NSW, VIC with formal calibration certificate | Third-party authorised service network, longer turnaround |
| Price | Parallel-import model — no distributor margin stack, typically 30–50% below equivalent brand pricing | Premium brand pricing with tiered distributor markup |
| Replacement parts | Standard consumables ordered on demand from InstroDirect | Proprietary cartridges and cells, 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 probes drop straight into an existing control system without a new proprietary transmitter.
