Product details
Long-Body Inline 2-Electrode Conductivity Sensor
The InstroDirect IDC-2W-SS-L Inline Long-Body Stainless 2-Electrode Conductivity Sensor is an extended-body two-electrode conductivity probe for deep-insertion installations in process tanks, wastewater return lines, and industrial cooling loops. The longer wetted body keeps the electrode clear of wall effects and sediment while the 1″ NPT thread provides a secure, vibration-tolerant mount.
Technical Specifications
| Parameter | Specification |
|---|---|
| Measuring range | Electrode coefficient 0.01: 0.01 – 50 µS/cm; 0.1: 0.1 – 500 µS/cm; 1: 0.1 – 5000 µS/cm |
| Measuring method | Second-line conductivity |
| Temperature range | 0 – 130 °C |
| Accuracy | ≤ ±1% |
| Resolution | 0.01 µS/cm |
| Maximum withstand voltage | 10 bar |
| Electrode coefficient | 0.01, 0.1, 1 |
| Material | Stainless steel 316L |
| Temperature sensor | NTC, PT1000 |
| Interface type | Cab, VP6, M12 |
| Output | RS485 |
| Dimensions | Φ 21 × 152 |
| Mounting method | NPT 3/4 threads |
Typical Australian Applications
- WWTP return activated sludge monitoring
- Large industrial cooling tower basins
- Heated process tanks
- Plating rinse water
- Council potable water reservoirs
Why Integrators Choose the IDC-2W-SS-L
- Extended body immerses electrodes clear of tank walls and settled solids
- 1″ thread spreads mechanical load in vibrating installations
- 316 stainless body handles chloride-rich wastewater and brine
- Integrated Pt1000 eliminates the need for a separate RTD
- RS485 Modbus integrates with AB, Siemens, Schneider, and Beckhoff
Installation & Calibration Notes
Install through a pipe boss with the electrodes at least 50 mm clear of any wall. Mount at 15° downward incline in horizontal lines to prevent air pocket entrapment. Clean electrodes with dilute HCl every 3–6 months depending on scaling.
Frequently Asked Questions
Can this be used in wastewater?
Yes — 316 stainless handles most WWTP chemistries. For high-biofilm sludge applications, consider the 4-electrode IDC-4E-SS which handles fouling better.
What insertion depth is provided?
Approximately 120 mm from the thread face to electrode tip. For custom lengths (150 mm, 200 mm, or 300 mm) contact us for a quote.
Is this suitable for steam boilers?
Below 100 °C and 10 bar, yes. For higher temperature or pressure service, specify the PEEK-body or sanitary variants.
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.
