Product details
Compact Inline 2-Electrode Conductivity Sensor — Threaded Stainless
The InstroDirect IDC-2W-SS-C Compact Stainless 2-Electrode Conductivity Sensor is a short-body, two-electrode conductivity probe designed for inline measurement in clean water circuits — RO/DI systems, boiler make-up, cooling water, and polishing loops. 316 stainless body with an integrated Pt1000 temperature sensor and a compact threaded process mount for retrofit into existing sample lines.
Technical Specifications
| Parameter | Specification |
|---|---|
| Measurement method | 2-electrode contacting |
| Conductivity range | 0 – 20 mS/cm |
| Cell constant (K) | K = 1.0 (cm⁻¹) |
| Accuracy | ±1% of reading |
| Temperature measurement | Integrated Pt1000 / Pt100 |
| Operating temperature | 0 – 80 °C |
| Pressure rating | ≤ 6 bar |
| Output signal | Analog 4–20 mA or RS485 Modbus RTU (specify) |
| Body / wetted materials | 316 stainless steel body, graphite electrodes, FKM O-rings |
| Process connection | 1/2″ NPT threaded |
| Ingress protection | IP68 |
| Cable | 5 m, 4-core shielded (10 m / 20 m on request) |
| Warranty | 12 months, Australian-backed |
Typical Australian Applications
- RO / DI permeate monitoring
- Boiler feedwater make-up
- Cooling tower blow-down control
- Potable water quality checks
- OEM skid integration
Why Integrators Choose the IDC-2W-SS-C
- Compact form factor fits retrofit installations without re-piping
- 2-electrode design is the industry standard for low-to-mid EC (<20 mS/cm)
- Pt1000 temperature compensation built in — accurate readings across thermal cycles
- Graphite electrodes resist scaling and organic fouling
- Modbus or 4–20 mA lets you connect to any PLC or datalogger
Installation & Calibration Notes
Install horizontally or vertically in a tee or pipe boss with the full electrode submerged. Calibrate two-point using 1413 µS/cm and 12.88 mS/cm KCl standards every 3–6 months. Clean electrodes with dilute hydrochloric acid or deionised water to remove scaling.
Frequently Asked Questions
What is the difference between 2-electrode and 4-electrode probes?
2-electrode is standard for low-to-mid conductivity (<20 mS/cm). 4-electrode handles higher ranges and is less affected by fouling. For RO, boiler, or cooling water this 2-electrode probe is the right pick.
Can I use this with Allen-Bradley or Siemens PLCs?
Yes. Choose the RS485 Modbus variant for digital integration or the 4–20 mA variant for analog inputs. Both are standard on AB CompactLogix, Siemens S7-1200/1500, and Schneider M221/M580.
How often does it need calibration?
Every 3–6 months in typical clean water service. Harsh or scaling-prone media may need monthly. InstroDirect provides on-site calibration across QLD, NSW, and VIC.
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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