Product details
Online Residual Chlorine Analyzer — DPD
The InstroDirect IDOA-FCL Residual Chlorine Online Analyzer is a continuous online residual chlorine analyzer with two method options: DPD colorimetric (reagent-based, regulatory-grade accuracy). Provide continuous data on RS485 Modbus for drinking water compliance or 4-20ma, WWTP UV/chlorine polishing step control, and cooling water biofilm management. Self Cleaning of cell for long endurance runs.
Typical Australian Applications
- Drinking water distribution network residual chlorine compliance
- WWTP disinfection polishing step monitoring
- Cooling water biofilm and legionella control
- Aquatic centre and swimming pool chlorine regulation
- Food & beverage CIP sanitiser verification
- Healthcare facility potable water monitoring
Why Choose InstroDirect for Online Water Analyzers
- Choice of method fits the application — DPD for compliance, amperometric for low-maintenance continuous monitoring
- Integrates with the InstroDirect Free Chlorine Monitoring Panel for a complete multi-parameter solution
- Annual service contract options include reagent top-ups and calibration
- Alarm output can trigger chlorinator dosing or SCADA alerts
Installation, Commissioning & Service
Sample line at 100 mL/min from the distribution main or reservoir sample tap. 24DC power, RS485 Modbus link. InstroDirect handles on-site commissioning, first calibration, and SCADA integration. Consider pairing with the IDFCP-1 Free Chlorin
Australian Technical Support, Calibration & Consumables
- Brisbane-based technical support from field engineers with 20+ years automation experience
- On-site commissioning and calibration service across QLD, NSW, VIC with formal certificate
- Annual service contracts for councils, water utilities, and industrial clients
- Trade pricing for system integrators, water utilities, and environmental consultancies
Request a Quote
Online analyzers are project-priced based on configuration, reagent volume, and service requirements. Contact InstroDirect for a detailed quote including installation, commissioning, reagent supply, and annual service options.
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.
