E+H turbidity sensor

E+H Turbidity Sensor Technical Article

Turbidity sensors are crucial devices used to measure the clarity of liquids by determining the amount of light scattered by suspended solids within the liquid. Among the leading manufacturers of turbidity sensors, Endress+Hauser (E+H) stands out with its advanced and reliable products. This article delves into the technical aspects of E+H turbidity sensors, highlighting their key features, applications, and operational principles.

Overview of E+H Turbidity Sensors

Endress+Hauser offers a range of turbidity sensors designed for various industrial applications. These sensors are known for their high precision, durability, and ability to withstand harsh environmental conditions. Key models include the Turbimax CUS50D and CUS51D, as well as the OUM670 turbidimeter paired with the OUSTF10 inline sensor.

Technical Features and Specifications

Turbimax CUS50D and CUS51D Sensors

The Turbimax CUS50D and CUS51D sensors employ absorption principles to measure turbidity, suspended solids concentration, and absorbance. These sensors are characterized by:High Measurement Accuracy and Repeatability: Ensuring stable results within medium to high turbidity ranges.

Chemical Resistance and Low Maintenance: Featuring Teflon-coated sensor heads for anti-fouling properties and reduced maintenance.

Robust Construction: Suitable for use in corrosive media and seawater due to their plastic and stainless steel construction.

Easy Commissioning: Pre-calibrated for various applications, allowing for simple single-point calibration adjustments.

Automatic Sludge Measurement Mode: Optimizes signal channel selection for different types of sludge.

Process Adaptability: Compatible with various E+H mounting brackets for quick sensor positioning.

The measurement range for these sensors spans from 40 to 4000 FAU (Formazin Attenuation Units), corresponding to 0 to 60 g/L of suspended solids and 0 to 10 OD (Optical Density). They operate within a temperature range of -20 to 85 °C (process temperature) and -20 to 60 °C (ambient temperature), and can handle process pressures up to 4.5 bar.

OUM670 Turbidimeter with OUSTF10 Inline Sensor

The OUM670 turbidimeter, paired with the OUSTF10 inline sensor, utilizes forward scatter technology to measure turbidity. The sensor projects a focused parallel beam of light through the liquid, with a scatter beam detector positioned at 11 degrees to maximize the detection of scattered light. This design ensures equal path lengths for the direct and scattered beams, providing excellent color compensation.

Key specifications include:

Measurement Principle: Forward scatter turbidimeter.

Installation: Suitable for inline installation within process pipelines.

Fail-safe Operation: Incorporates features such as bubble reject, range selector, and lamp fail alerts to ensure reliable operation.

Calibration: Supports FTU calibration using Formazin and PPM calibration using diatomaceous earth.

Maintenance: Includes lamp voltage adjustment, lamp replacement, and window/gasket replacement procedures.

Conclusion

E+H turbidity sensors represent the pinnacle of technological advancement in turbidity measurement. Their high precision, durability, and adaptability make them indispensable tools in various industrial applications. With continuous innovations and improvements, E+H remains at the forefront of turbidity sensor technology, providing reliable solutions for monitoring and controlling liquid clarity.