Description
AquaScat S In-Line Turbidity Sensor
The Sigrist AquaScat S is a high-precision in-line turbidity sensor engineered for continuous monitoring of water quality across drinking water, beverage, food, and industrial process applications. Built around the 90° scattered light measuring principle in accordance with ISO 7027 / EN 27027, the AquaScat S delivers exceptional accuracy with minimal maintenance.
Furthermore, the AquaScat S is one of the most adaptable in-line turbidity sensors on the market, with various installation options, low drift, and flexible integration into modern process control systems.
Applications
Across the water and beverage industries, the AquaScat S supports a wide range of monitoring tasks, including:
- Monitoring of UV disinfection systems
- Monitoring of ultrafiltration systems
- Turbidity measurement in treated drinking water
- Monitoring of reservoirs and water distribution networks
- Turbidity in process water and beverage production
As a result, the AquaScat S has become a trusted choice for water utilities, beverage producers, and food manufacturers requiring reliable, low-maintenance turbidity measurement.
Outstanding Measurement Accuracy and Stability
Built for precision applications, the AquaScat S delivers measurement accuracy of ±1 % or ±0.007 FNU. Therefore, it is ideal for filtration monitoring and stringent water quality control.
In addition, the sensor uses a light trap absorber to minimise stray light effects, which makes precise measurements down to a few mFNU possible. Thanks to very low drift, measurement values remain accurate and comparable, even after months of continuous operation.
Minimal Maintenance, Maximum Availability
Unlike traditional turbidity sensors, the AquaScat S is designed for genuinely low-maintenance operation. For example:
- The slanted, self-cleaning sensor head uses flow dynamics to automatically clean the optical surface, with no mechanical wiper required
- A factory 7-point calibration is performed across the entire 0–4,000 FNU measuring range
- A secondary turbidity standard (solids reference) is available for recalibration during operation
- No toxic formazine is required for recalibration
As a result, operators benefit from reduced downtime, lower service costs, and safer working conditions.
Robust Design for Demanding Environments
Engineered for outdoor and harsh industrial use, the AquaScat S features a stainless steel (1.4571 / 316Ti) body with PPSU and sapphire glass components. Consequently, it offers excellent corrosion resistance and long service life in demanding environments.
In addition, the sensor has no moving parts, which improves reliability and reduces wear. Two protection class options are available:
- IP67 – for the standard sensor with M12 8-pin connector
- IP68 – for the immersion version with fixed cable
Display in total suspended solids (TSS) is also available, providing extra flexibility for operators monitoring sediment or filtration performance.
Flexible System Integration
To suit any process control architecture, the AquaScat S offers multiple integration options:
- Direct connection via analogue or digital output, with no control unit required
- Sicon or Sicon M control unit for data visualisation and simple sensor parameterisation
- Conn-R connection box for basic sensor operation
Furthermore, additional fieldbus protocols are available, including Modbus TCP, Modbus RTU, Profibus DP, and Profinet IO. This makes integration into SCADA and PLC systems straightforward, regardless of the existing automation platform.
Flexible Process Connections
Because every installation is different, the AquaScat S supports a range of process connection options:
- Steel pipe with welded flange (DN40, DN50, DN80)
- Fitting for PE or PVC pipes
- PVC bypass measuring cell
- Exchangeable fitting
- Direct tank immersion (submersible version)
Consequently, the AquaScat S can be installed in almost any configuration, from clean drinking water mains to open process tanks.
Certifications and Conformities
Sigrist designed the AquaScat S to meet the demanding requirements of drinking water and food contact applications. As a result, the sensor carries the following certifications:
- ACS (Attestation Conformité Sanitaire)
- DWI (Drinking Water Inspectorate)
- DVGW / UBA Hygiene Conformity
- SVGW certification
- CE and UKCA conformity
These certifications give water utilities and food producers confidence that the AquaScat S meets internationally recognised hygiene and safety standards.
Technical Specs
Below are the key technical specifications for the AquaScat S in-line turbidity sensor:
| Measuring principle | 90° scattered light, ISO 7027 / EN 27027 |
| Light source | LED 860 nm |
| Measuring range | 0 – 4,000 FNU / ~0 – 5,000 mg/L TSS |
| Resolution | 0.001 FNU |
| Accuracy | 0–50 FNU: ±0.002 FNU or ±1 %. 50–4,000 FNU: ±2 % |
| Repeatability | 0.001 FNU or ±0.1 % |
| Medium temperature | 0 °C to +60 °C |
| Temperature measurement | 0.1 °C |
| Operating pressure | Max. 10 bar at 20 °C |
| Sample flow | Max. 3.0 m/s (inline), 0.2–2.0 L/min (bypass) |
| Pipe diameter | Min. 60 mm (inline installation) |
| Ambient humidity | 0–100 % |
| Protection class | IP67 (standard) / IP68 (immersion) |
| Power supply | 24 VDC ±10 %, galvanically isolated |
| Power consumption | Max. 2 W |
| Wetted materials | Stainless steel (316Ti / 1.4571), PPSU, sapphire glass |
| Dimensions | Ø 40 × 200 mm |
Industries
Throughout Australia, New Zealand, and internationally, the AquaScat S in-line turbidity sensor is widely used across:
- Drinking water treatment and distribution
- Beverage and food production
- Process water treatment in industrial facilities
- Pharmaceutical and biotech manufacturing
- Pool and recreational water monitoring
- Wastewater and reuse applications
Reliable In-Line Turbidity Measurement from ProDetec
As the Australian and New Zealand partner for Sigrist-Photometer, ProDetec supplies the AquaScat S in-line turbidity sensor with full local technical support, installation guidance, commissioning, and ongoing service. Whether you are monitoring drinking water quality, verifying ultrafiltration performance, or maintaining beverage process integrity, the AquaScat S delivers Swiss-engineered precision backed by trusted local expertise.
Calibration Certificate
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EU Declaration of Conformity
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Sigrist Communication Software
Vx29 is the current software controlling communication between the analyser and the SICON.
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The control unit SICON uses state-of-the-art touch screen technology with colour display. It allows simple operation using logical menu guidance. The user can select how results are displayed, either as plain values, graphs or historical data, including the indication of system and alarm status.
The control unit SICON offers all possibilities of full system integration using various interface options. A SD card is standard and can be used for data logging with almost unlimited storage capacity.
The SICON is available as a control unit for a single instrument, or the SICON M Control Unit which allows simple operation of several instruments up to a maximum of 8 measuring channels.
