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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

Chlorine Analyzer, Free/Total

CLF10 sc & CLT10 sc

Chlorine Analyzer, Free/Total


The CLF10 sc analyzer uses Hach's exclusive self diagnostics to alert users when the process has changed or the instrument needs servicing. Diagnostic features include the Cal Watch algorithm for warning of pH and chlorine calibration deviation and a non-contacting flow sensor for notification of insufficient sample flow. Free chlorine measurement with an amperometric analyzer, such as the CLF10 sc, does not require reagents, thus eliminating the need for routine reagent replacement and waste stream management. The CLF10sc free chlorine analyzer allows for real-time control of disinfection processes by providing continuous reading. Product includes free chlorine sensor, chlorine sensor block, sc100 controller, sc Gateway, stainless steel panel, pH flow cell and pHD sensor.

  • Exclusive Self Diagnostics
  • No Reagent Replacement, No Waste Stream
  • Real-Time Process Control
  • Compatible with Hach's "Plug and Play" Digital Controllers
  • EPA Compliant According to Method 334.0


Accuracy:Free Chlorine: ± 3 % of the reference test** (DPD) at constant pH less than 7.2 (±0.2 pH unit)
Accuracy 2:Free Chlorine: ± 10 % of the reference test** (DPD) at stable pH less than 8.5 (±0.5 pH unit from the pH at calibration)
Accuracy 3:Total Chlorine: ± of the reference test** (DPD) at stable pH 10 % less than 8.5 (±0.5 pH unit from the pH at calibration)
Accuracy 4:Total Chlorine: ± 20 % of the reference test** (DPD) at stable pH greater than 8.5
Cable Connection:5 pin, M12 connector
Cable Length:1 m (between gateways and sc-controller)
Calibration Method:(zero and slope) calibration
Certifications:CE / ETL, EMC
Connection Drain Line:pH Flow Cell Outlet: 1/2-inch ID
Connections:1/4 inch OD
Controller Compatibility:sc controller platform
Diameter:Sensor: 0.98 in ( 25 mm )
Dimensions:Sensor Only: 195 
mm x 25 mm (7.68 in x 0.98 in)
Dimensions Metric (H x W X D):151 mm x 495 mm x 483 mm
Interferences:Monochloramine, chlorine dioxide, ozone, 
and chalk deposits
Length:Sensor: 7.7 in ( 195 mm )
Lower Limit of Detection (LOD):30 ppb (0.03 ppm)
30 ppb (0.03 ppm)
Material:Corrosion-resistant materials, fully-submersible 
(stainless steel, PVC, silicon rubber and polycarbonate)
Measurement Method:Reagentless, electrochemical, three-electrode amperometric system
Measurement Range 2:0 to 20 ppm ppm
Mounting:Panel or Wall Mounting
Operating Temperature Range:0 to 45 °C (32 to 113 °F)
pH Range:4 - 9
Power Requirements (Voltage):12 V DC
Pressure Range:0.5 bar, no pressure impulses and/or vibrations
Repeatability:40 ppb or 3%, whichever is greater
Resolution:0.001 ppm (1 ppb)
Response Time:Free Chlorine: 140 s or less for 90% change (T90) 
at a stable temperature and pH

Total Chlorine: 100 s or less for 90% change (T90) 
at a stable temperature and pH
Sample Flow Rate:30 to 50 L/h (7.9 to 13.2 gal/hour), 
Optimal is 40 L/hour (10.5 gal/hour)
Sample Temperature:5 to 45 °C (41 to 113 °F)
Sampling Time:Continuous
Ship Wt. (lbs):Approximately 9.1 Approximately 9.1 kg (20 lbs)
Storage Conditions:-20 °C to 60 °C dry
Temperature Compensation:Internal temperature sensor
Internal temperature sensor
Warranty:1 Year
Weight:12.13 lbs. (5.5 kg) Approximately 5.5 kg (12 lbs)
Panel and empty panel-mounted components only


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