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HACH COMPANY was established in 1947, in Ames, Iowa, USA. For more than 60 years, Hach has been the world market leader for Analytical Instrumentation for Complete Water Analysis, providing solutions for lab, process and field.

In 2002, GLI, a leading US manufacturer of process electro-chemistry analytical instruments, became part of the Hach Company family.

Water analysis has to be right. Our customers deserve complete, reliable solutions that they can be fully  confident in. Hach is your answer. We make water analysis simpler

Suspended Solids / Turbidity Sensor


Suspended Solids / Turbidity Sensor


Applications: Drinking Water, Wastewater, Industrial Water.

The SOLITAX sc Suspended Solids and Turbidity Analyzer includes a sc200 controller and stainless steel ts-line sc Solids and Turbidity Sensor (0.001 mg/L to 50 g/L, 0.001 to 4000 NTU) with wiper. It measures turbidity and suspended solids in drinking water, wastewater and industrial process applications. NOTE: Fixed point installation kit or handrail mount kit must be ordered separately for analyzer immersion in open tanks. Power cord must be ordered separately as well.

  • Accurate, Color-independent Measurement
  • Self-cleaning Wiper Prevents Erroneous Values
  • Easy One-point Calibration
  • Improve overall efficiency of the plant


Accuracy:Turbidity up to 1000 NTU: 
without calibration < 5% of the measured value ±0.01 NTU
with calibration < 1% of the measured value ±0.01 NTU
Cable Length:10 m (optional extension cables available)
Calibration Method:Turbidity: Formazin or STABLCAL Standard (at 800 NTU). 
Suspended Solids: Sample specific, based on gravimetric TSS analysis with a correction factor procedure.
Flow:Max. 3 m/s (the presence of air bubbles affects the measurement)
Length:7.9 in ( 200 mm )
Maintenance Interval:1 h/month
Material:Optics Carrier and Sleeve: stainless steel 1.4571; Wiper Arm: stainless steel 1.4581; Wiper Rubber: silicone rubber (standard) Optional: Viton (LZX578); Wiper Shaft: stainless steel 1.4571
Max. cable length Sensor-to-Controller:100
Measuring Principle:Infrared Duo scattered light technique for color-independent turbidity measurement Turbidity in accordance with DIN EN 27027 / TS equivalent DIN 38414
Measuring Range TSS-Content:0.001 mg/L to 50 g/L
Measuring Range Turbidity:0.001 to 4000 NTU
Operating Temperature Range:0 to 40 °C
Parameter:Suspended Solids, Turbidity
Pressure Range:< 6 bar
Repeatability:< 3 %
Repeatability Turbidity:< 1 %
Response Time:1 s < T90 < 300 s (adjustable)
Response Time T90:1 to 300 s adjustable
Special Notes:Defined according to ISO/WD 13530. 
Suspended Solids: Less than 1% of reading.
Turbidity: Less than 3% of reading (depends on the homogeneity of municipal activated sludge)
Units:Turbidity: User selectable—NTU, FNU, or TE/F
Suspended Solids: User selectable—g/L, mg/L, ppm, or % solids
Weight Sensor:1.8 kg


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