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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


Chlorine Analyzer, Free/Total


Industry standard, CL17 Free Chlorine Analyzer. Included with the CL17 analyzer is a 1 month supply of DPD indicator and Free Chlorine indicator and buffer solutions, an installation kit, sample conditioning kit, maintenance kit, and a user manual. *This product has not been evaluated to test for chlorine and chloramines in medical applications in the United States.

  • Accurate, Reliable Results
  • Simple, Predictable Maintenance
  • Factory Calibrated
  • EPA Compliant
  • Pump Control


Accuracy:± 5 % or ±0.03 mg/L (ppm) as CL2, whichever is greater
Air Purge:0.1 cfm (0.17 m³/h) instrument quality air at max. 20 psig (ca. 1.4 bar) with 1/4-inch OD tube, quick disconnect fitting
Alarm:Two alarms selectable for sample concentration alarm, analyzer system warning, or analyzer system shut-down alarm. Each is equipped with an SPDT relay with contacts rated for 5A resistive load at 230 V AC.
Certifications:Europe, CE Approved with:
EN 61326-1
EN 61010-1
IEC 60529

North America:
UL 61010A-1
CAN/CSA C22.2 No. 1010.1-92
Communication:4-20mA Output
Communication Capabilities:4-20mA Output
Cycle Time:2.5 minutes
Dimensions Metric (H x W X D):454 mm x 314 mm x 179 mm
Display:LCD, 3-1/2 inch digit measurement readout and six-character alphanumeric scrolling text line
Drain:1/2-inch ID flexible hose, hose barb
Enclosure Construction:ABS plastic, two clear polycarbonate windows, IP62-rated with the gasketed door latched.
Inlet:1/4-inch OD polyethylene tube, quick-disconnect fitting
Inlet Pressure:1 to 5 psig (0.07 to 0.34 bar), 1.5 psi is optimum
Interferences:Other oxidizing agents such as bromide, chlorine dioxide, permanganate and ozone will cause a positive interference. Hexavalent chromium will cause a positive interference: 1 mg/L Cr⁶⁺ = approximately 0.02 mg/L as Cl₂. Hardness must not exceed 1,000 mg/L as CaCO₃.
Light Source:Class 1 LED (light emitting diode) with a peak wavelength of 520 nm; 50,000 hours estimated minimum life
Lower Limit of Detection (LOD):0.03 mg/L (ppm)
Mounting:Wall mount
Operating Humidity:Up to 90% at 40 °C (104 °F) maximum
Operating Temperature Range:5 to 40 °C (41 to 104 °F)
Power Requirements (Amps):2.5 A
Power Requirements (Hz):50/60 Hz
Power Requirements (Voltage):100 - 115/230 V AC
Pressure Range:Inlet Pressure to Sample Conditioning: 1.5 to 75 psi (0.1 bar to 5.2 bar)
Range:0 to 5 mg/L free or total residual chlorine
Repeatability:0.01 ppm or 3.0 % , whichever is greater
Sample Flow Rate:200 to 500 mL per minute minimum required
Sample Temperature:5 to 40 °C (41 to 104 °F)
Weight:24.91 lbs. (11.3 kg)


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