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 method | 4-electrode graphite contacting |
| Conductivity range | 0 – 2000 mS/cm |
| Cell constant (K) | K = 0.6 (cm⁻¹) |
| Accuracy | ±1% of reading |
| Temperature measurement | Integrated Pt1000 / Pt100 |
| Operating temperature | 0 – 80 °C |
| Pressure rating | ≤ 6 bar |
| Output signal | RS485 Modbus RTU + Pt1000 |
| Body / wetted materials | 316 stainless body, graphite electrodes, slotted stainless cage |
| Process connection | 3/4″ NPT threaded |
| Ingress protection | IP68 |
| Cable | 5 m PG9 cable gland, 4-core shielded |
| Warranty | 12 months, Australian-backed |
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
- KCl calibration solutions (1413 µS/cm, 12.88 mS/cm, 111.8 mS/cm) stocked locally
- Replacement electrodes and O-rings for extended service life — dispatched same business day ex Brisbane
- Next-day delivery across Australia for stock items; 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.
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