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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

Turbidimeter (Ultra-Low Range)

FilterTrak 660™ sc

Turbidimeter (Ultra-Low Range)


Applications: Drinking Water, Industrial Water.

FilterTrak Laser Nephelometer offers the best resolution in the market. Detects changes in turbidity as low as 0.0005 NTU. Meets all USEPA filtering monitoring requirements. Compatible with Hach Multi-Sensor, Multi-Parameter Digital Controllers, sensor can be used with Hach's new sc200 or sc1000 Digital Controllers. Includes Manual and StablCal Turbidity Standards.

  • Lowest Limit of Detection in the Market
  • Meets All USEPA Filter Monitoring Requirements
  • Monitor, Optimize, and Report
  • Compatible with Hach Multi-Sensor, Multi-Parameter Digital Controllers


Accuracy:± 5 % to 1000 of reading
Accuracy 2:(Defined according to ISO 15839) From 1000 to 5000 mNTU ±2% of reading
Alarm:Three set-point alarms Two nephelometric set-point alarms (SOM required)
Calibration Method:StablCal, stabilized formazin
Certifications:Listed by ETL to UL 61010A-1: Certified by ETL to CSA C22.2 No. 1010.1: CE certified by Hach Company to EN 61010-1
Communication:MODBUS® RS485/ RS232, PROFIBUS DP, HART available with sc controller
Dimensions Metric (H x W X D):406 mm x 305 mm x 254 mm
Display Resolution:0.001 mNTU up to 9.9999 mNTU
Fitting type:Drenaje: Hembra de 1/2" NPT, lengüeta de manguera de 1/2" (suministrado), Drain: 1/2-inch NPT female, 1/2-inch hose barb (provided), clear drain tubing is recommended
Flow Rate:100 to 750 mL /min (1.6 to 11.9 gal/hour)
Light Source:660 nm Laser Diode
Lower Limit of Detection (LOD):(Defined according to ISO 15839)
Less than 0.3 mNTU
Lowest Expected Reading:5 mNTU using deionized, reverse osmosis water, based on statistical averages from three instruments
Measurement Frequency:One reading per second
Mounting:Wall and floor stand
Operating Humidity:5 to 99 % non-condensing
Operating Temperature Range:0 to 40 °C
Power Requirements (Voltage):None
Range:to (0.0 to 5.0 NTU) 5000 mNTU = 5.000 NTU
Repeatability:(Defined according to ISO 15839)
Better than ± at 800 mNTU (0.8 NTU)

+ 3.6 % at 30 mNTU (0.03 NTU)
Resolution:0.001 mNTU up to 0.001 mNTU (0.000005 NTU)
Sample Temperature:0 to 50 °C (32 to 122 °F)
Storage Conditions:-20 °C to 60 °C
Warranty:1 Year
Weight:10.01 lbs. (4.54 kg)


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