AquaScat 2 HT | High-Turbidity Meter for Raw Water

Unlike traditional turbidity meters, the AquaScat 2 HT measures turbidity in a free-falling water jet. Because the water never touches the optical unit, the measuring windows stay clean even at high turbidity levels, where conventional sensors typically suffer from fouling and drift.

In addition, this contactless design delivers several practical benefits:

• No window cleaning required, even under heavy turbidity loads
• Minimal maintenance thanks to non-contact measurement
• Precise results across the entire turbidity measuring range
• No drift caused by contamination on the optics
• Continuous, reliable performance with reduced service intervals

Consequently, water treatment operators benefit from accurate readings without the manual cleaning and frequent maintenance associated with conventional inline turbidity sensors.

Engineered for raw water and pre-filtration monitoring, the AquaScat 2 HT is specifically optimised for turbidity values above 10 FNU. Therefore, it is the ideal choice for measurement points where conventional low-range sensors would saturate or require frequent recalibration.

Key application areas include:

• Raw water intake from rivers, dams, or bores
• Sedimentation tank and clarifier performance monitoring
• Pre-filtration turbidity verification
• Sand and media filter inlet and outlet monitoring
• Industrial process water with variable solids loading

In addition, the AquaScat 2 HT pairs well with the AquaScat 2 WTM in multi-stage treatment plants — providing HT-grade ruggedness at the front of the process and WTM-grade sensitivity at the polishing stage.

The AquaScat 2 HT is factory calibrated with formazin. For ongoing recalibration during operation, however, a secondary turbidity standard (solid reference) is used instead. Consequently, operators can perform precise recalibration without handling toxic formazin solutions.

In addition, the solid reference offers several practical advantages:

• Stable optical properties that do not change over time
• Solids reference values are pre-loaded onto the device at the factory
• Reduced time spent on routine calibration checks
• Safer working environment with no toxic chemicals on site
• Repeatable, comparable verification results across service intervals

Integrated Touchscreen Operating Unit

To make daily operation straightforward, the AquaScat 2 HT features a 3.5″ colour touchscreen display. In addition, the integrated control unit provides:

• On-screen display of measurement values, status, and alarm messages
• Graphical trend visualisation directly on the device
• Internal data memory for the last 32 days of measurement data
• Intuitive menu navigation via touchscreen

Consequently, operators can review recent trends, troubleshoot issues, and verify performance without connecting an external laptop or control room interface.

To suit any process control architecture, the AquaScat 2 HT offers a wide range of integration options:

• Analogue outputs: 2 × 0/4–20 mA, galvanically isolated
• Relay outputs: 2 × 250 VAC, 4 A
• Digital interfaces: Ethernet, Modbus TCP, SD card as standard
• Optional fieldbus: Profibus DP, Profinet IO, Modbus RTU
• Additional inputs: flow meter, 2 × 0/4–20 mA

Furthermore, the AquaScat 2 HT integrates seamlessly into existing SCADA, PLC, and DCS systems, which makes it straightforward to retrofit into legacy water treatment plants or commission as part of new builds.

Below are the key technical specifications for the AquaScat 2 HT on-line turbidity meter:

Throughout Australia, New Zealand, and internationally, the AquaScat 2 HT on-line turbidity meter is widely used across:

• Drinking water treatment plants and raw water intake
• Municipal and industrial wastewater treatment
• Process water in manufacturing, mining, and food production
• Pre- and post-filtration monitoring (sand, media, membrane)
• Sedimentation and clarifier performance verification
• Reservoir and surface water quality control

As the Australian and New Zealand partner for Sigrist-Photometer, ProDetec supplies the AquaScat 2 HT with full local technical support, installation guidance, commissioning, and ongoing service. Whether you are monitoring raw water intake during a heavy rain event, verifying sedimentation performance, or checking pre-filter turbidity, the AquaScat 2 HT delivers Swiss-engineered ruggedness backed by trusted local expertise.