GF 4150 turbidity meter

simple (1 unit) installation with built-in pressure regulator
EPA in accordance with U.S. EPA 180.1
programmable 4-20 mA output very accessible for wiring and maintenance
ultrasonic cleaning option ensures long and stable on-line measurement compatibility:
8058 i-Go signal converter
Spannable 4 to 20 mA output or RS 485 output
Handy cuvette holder
Ultrasonic cleaning option ensures long and constant online measurement
Easy access for wiring and maintenance
Two alarm relays Meets EPA according to US EPA 180.1
Bright display with backlight
Easy and simple installation with one unit with built-in pressure regulator
Meets ISO 7027 Cheap standards allow multiple system calibrations


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.

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



  • CE
  • Compliant to ISO 7027
  • RoHS conform
  • Compliant per U.S. EPA 180.1
  • FCC
  • ETL Listed

Areas of application:

  • Monitoring Filter Performance
  • Municipal Water Distribution
  • Wastewater Reclamation and Tertiary Effluent
  • aquatische support
  • Raw or Filtered Water


Process Connection
Nominal diameter
Brand Georg Fischer
Manometer diameter
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