Turbidity and suspended-solids sensors for Australian water and wastewater
ISO 7027 inline optical turbidity for clean process water and drinking-water service, plus a self-cleaning wiper-equipped MLSS probe for activated-sludge and high-solids wastewater duty. Stainless construction throughout. RS485 Modbus and 4–20 mA outputs.
2 SKUs in stockISO 7027 compliantSelf-cleaning wiper option2–4 week delivery
IDTB-IL-316Inline Optical Turbidity Sensor — ISO 7027316 SS · 0–1000 NTUView ›IDTB-SS-WSelf-Cleaning Turbidity / MLSS Probe0–4000 NTU · wiperView ›
Inline optical (ISO 7027) vs self-cleaning MLSS — which to specify
The IDTB-IL-316 is the ISO 7027-compliant inline optical turbidity sensor: 316 stainless body, 90° scattered-light measurement, suitable for drinking-water turbidity monitoring (typically 0–10 NTU), clean process water, and low-solids streams up to about 1000 NTU. Specify this when ISO 7027 compliance is a regulatory or specification requirement.
The IDTB-SS-W is the heavy-duty MLSS variant: stainless body with a built-in motorised wiper that sweeps the optical window every 5–60 minutes (configurable), suitable for activated-sludge mixed liquor (typically 1000–4000 mg/L MLSS), primary clarifier monitoring, and any high-solids stream where biofilm or particulate buildup would foul a fixed optical window. Specify this when continuous unmaintained operation in dirty water is the priority.
HACH and E+H alternative
Both sensors output RS485 Modbus and 4–20 mA — direct integration into any PLC or SCADA without the proprietary controller dependency of HACH SC-series turbidity systems or E+H Turbimax. Same optical sensing performance, open-protocol data, no vendor lock-in.
Calibration and maintenance
Turbidity calibration uses formazin or polymer-based calibration standards (Stablcal equivalent). Recommended calibration interval is monthly for drinking-water duty, quarterly for general process, annually for MLSS service (where measurement is relative to plant baseline rather than absolute).
Australian compliance
Drinking-water turbidity sensors align with AS/NZS 4020:2018 and the NHMRC Australian Drinking Water Guidelines (1.0 NTU 95th percentile and 0.5 NTU monthly mean targets). Wastewater MLSS sensors meet state-EPA reporting requirements when paired with calibrated transmitters.
Who specifies InstroDirect turbidity?
Drinking-water utilities
IDTB-IL-316 on filtered-water turbidity monitoring at WTP filters, treated-water reservoirs, and distribution monitoring points.
Wastewater treatment plants
IDTB-SS-W self-cleaning wiper on activated-sludge MLSS, primary clarifier underflow, and final-effluent monitoring.
Food & beverage and dairy
IDTB-IL-316 on process water clarity and CIP rinse verification.
Mining and process water
IDTB-SS-W on tailings dam discharge monitoring and process water clarification monitoring.
Request a quote
Send us the measurement range, application, mounting, and PLC platform. Contact our technical team or call 0403 082 383.
Showing all 2 resultsSorted by popularity
