An inline turbidity sensor that detects particles and suspended solids in liquids by measuring 12° forward light scattering. The direct inline measurement eliminates the need for sampling and provides fast, continuous monitoring of turbidity and particle concentration changes within the process medium.
The ProScat12 inline turbidity sensor uses the 12° forward light scattering principle to detect suspended solids in liquids. This measuring principle is typically used for turbidity measurements in a range from approximately 0–1 ppm up to 0–1,000 ppm, depending on the application and process medium. Forward scattering, side scattering (nephelometry), and reflection are the three main methods used in optical turbidity measurement.
A focused beam of light is projected through the process liquid, where suspended particles scatter the light. Dedicated detectors measure the resulting forward-scattered light, while an additional detector positioned opposite the light source measures the transmitted light. The sensor electronics combine the signals from both detectors, and the ratio of these signals is used to calculate the turbidity value.
Since turbidity is not an absolute physical quantity like temperature or pressure but depends on the optical properties of the sample, the sensor is typically calibrated using reference standards such as Formazin or kieselguhr (diatomaceous earth) suspensions. This ensures accurate and repeatable measurement results across a wide range of applications.
The ProScat12 sensor is designed for continuous operation with minimal maintenance requirements and long service life. Its measurement principle is largely independent of particle size, ensuring highly linear and reliable concentration measurements. Calibration is performed according to the specific application and configured measuring ranges and engineering units. The ratio measurement effectively compensates for the influence of product color, lamp aging, and window contamination, ensuring stable and accurate results. The sensor can be installed in virtually any pipeline larger than DN 125, with process connections and sealing materials selected to suit the application. The Model C1 Signal Amplifier is used for signal processing.
The IR LED light source offers a typical service life of approximately five years. Alternatively, the sensor can be equipped with a gas-filled full-spectrum measuring lamp with a service life of 1–2 years. The probe is manufactured from high-quality stainless steel, while alternative materials are available for demanding applications.
| Parameter | Specification |
|---|---|
| Nominal Sizes | Suitable for pipelines from DN 150 |
| Process Pressure | PN 16 / ANSI Class 150 |
| Operating Temperature | Up to 60 °C |
| Sensor Material | Stainless Steel 1.4471 (other materials available on request) |
| Window Material | Sapphire |
| Seal Material | Application-specific |
| Measuring Range | Typically 0–5 ppm, 0–10 ppm, 0–500 ppm |
| Repeatability | ±1% |
| Detector System | Silicon PIN photodiodes |
| Measurement Wavelength | Typically 880 nm |
| Protection Class | IP65 / NEMA 4X |
The ProScat12 inline turbidity sensor uses the 12° forward light scattering principle to detect suspended solids in liquids. This measuring principle is typically used for turbidity measurements in a range from approximately 0–1 ppm up to 0–1,000 ppm, depending on the application and process medium. Forward scattering, side scattering (nephelometry), and reflection are the three main methods used in optical turbidity measurement.
A focused beam of light is projected through the process liquid, where suspended particles scatter the light. Dedicated detectors measure the resulting forward-scattered light, while an additional detector positioned opposite the light source measures the transmitted light. The sensor electronics combine the signals from both detectors, and the ratio of these signals is used to calculate the turbidity value.
Since turbidity is not an absolute physical quantity like temperature or pressure but depends on the optical properties of the sample, the sensor is typically calibrated using reference standards such as Formazin or kieselguhr (diatomaceous earth) suspensions. This ensures accurate and repeatable measurement results across a wide range of applications.
The ProScat12 sensor is designed for continuous operation with minimal maintenance requirements and long service life. Its measurement principle is largely independent of particle size, ensuring highly linear and reliable concentration measurements. Calibration is performed according to the specific application and configured measuring ranges and engineering units. The ratio measurement effectively compensates for the influence of product color, lamp aging, and window contamination, ensuring stable and accurate results. The sensor can be installed in virtually any pipeline larger than DN 125, with process connections and sealing materials selected to suit the application. The Model C1 Signal Amplifier is used for signal processing.
The IR LED light source offers a typical service life of approximately five years. Alternatively, the sensor can be equipped with a gas-filled full-spectrum measuring lamp with a service life of 1–2 years. The probe is manufactured from high-quality stainless steel, while alternative materials are available for demanding applications.
| Parameter | Specification |
|---|---|
| Nominal Sizes | Suitable for pipelines from DN 150 |
| Process Pressure | PN 16 / ANSI Class 150 |
| Operating Temperature | Up to 60 °C |
| Sensor Material | Stainless Steel 1.4471 (other materials available on request) |
| Window Material | Sapphire |
| Seal Material | Application-specific |
| Measuring Range | Typically 0–5 ppm, 0–10 ppm, 0–500 ppm |
| Repeatability | ±1% |
| Detector System | Silicon PIN photodiodes |
| Measurement Wavelength | Typically 880 nm |
| Protection Class | IP65 / NEMA 4X |
The Model C1 Signal Amplifier is compatible with most optical sensors from the Monitek and Chemtronic product ranges. System programming and calibration are carried out via a PC or laptop using intuitive menu-driven software. Calibration can be performed with one or multiple reference samples. All configuration settings and calibration data can be securely stored on the PC’s hard drive for backup and future use.
Benefit from more than 50 years of experience, field-proven measurement technology and personal consultation. Together, we will find the right solution for your application. Visit our contact page and tell us about your project to receive a non-binding quotation.