SOMQUALITY-NTU

Turbidity probe NTU

The measurement principle of the SOMQUALITY-NTU turbidity sensor is based on infrared light scatter at an angle of 90°. Thanks to the measurementat a wavelength of 880 nm and the wide detection
range of 0 to 4'000 NTU, the sensor can be used in varous water and wastewater treatment applications. Apart from turbidity, the SOMQUALITY-NTU also measures the medium temperature and the suspended solids content.

Features and advantages

• Municipal waste water treatment
• Industrial effluent treatment
• Water quality monitoring
• Sea water monitoring, fish farming, aquarium
• Process monitoring

Technical details

 Turbidity

• Principle	IR-scatter at 90°
  Measurement range	5 to 4000 NTU in 5 ranges: 5 - 50 NTU 5 - 200 NTU 5 - 1000 NTU 5 - 4000 NTU AUTOMATIC 0 - 4500 mg/L Calibration : Range 0 - 500 mg/L according toNF EN 872 Range >500 mg/L according toNF T 90 105 2
  Resolution	0.01 - 1 NTU - mg/L
  Accuracy	< 5% of the reading
  Maximum refresh time	< 1 s
  Temperature compensation	via CTN
  Accuracy temperature	± 0.5C

• Physical and environmental
  

  Power supply	5 to 12 VDC
  Power consumption	Standby: 40 μA Average RS485 (1 measurement/s): 820 μA Average SDI-12 (1 measurement/s): 4.2 mA Current pulse: 500 mA
  Output	Modbus RS-485 (standard) SDI-12 (optional)
  Dimension	∅27 mm x 170 mm
  Weight	300 g (sensor + 3 m cable)
  Material	PVC, DELRIN, Quartz, PMMA, Polyamide
  Max. pressure	5 bar
  IP classification	IP 68
  Operation temperature	0-50 °C
  Storage temperature	-10 °C to +60 °C