The Signet 4150 Turbidimeter system provides accurate and reliable EPA-compliant water quality monitoring for municipal and industrial applications.

The 4150 measures turbidity via a 90 degree light which reflects particles as they flow through the small volume, low flow glass cuvette. Air bubbles are eliminated in the cuvette by adjusting the backpressure valve on the outlet tube. The cuvette is located in a watertight dark chamber for continuously accurate
on-line measurement. A replaceable desiccant pack provides stable environment to ensure reliable measurements.

Simple and fast calibration can be accomplished in under five minutes by placing the glass cuvette from the measuring chamber into the cuvette holder, while the inlet and outlet tubing is still connected. The inexpensive calibration standard allows for dry and multiple system calibrations without mixing chemicals. After calibration, the unit is up and running with a simple insertion of the glass cuvette into the measuring chamber.

Additional features of the 4150 include a message indicator when the desiccant needs replacing and auto/ultrasonic cleaning of the glass cuvette for reduced maintenance.

The 4150 is available in two measuring ranges. The 0 to 100 NTU version is for low range applications such as drinking water. The 0 to 1000 NTU range can be used for various applications including raw water and wastewater.