3017M DPD Chlorine Analyzer


Accurate, reliable chlorine analysis from a brand you trust.

The 3017M Chlorine Analyzer is YSI’s newest online analyzer! This DPD colorimetric analyzer is used for continuous measurements of free or total chlorine in municipal drinking water and wastewater applications using an EPA approved method.

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The YSI 3017M Chlorine Analyzer uses proven DPD methodology to provide accurate and reliable free chlorine or total chlorine measurements in drinking water and final effluent wastewater samples. The 3017M can also be used in aquatic habitats and industrial cooling tower applications.

The 3017M is simple and low maintenance, with Flow Injection Analysis (FIA), factory calibration, and simplified tubing. Low reagent use reduces maintenance frequency. The analyzer can operate as a standalone unit or be integrated into YSI’s IQ SensorNet system of online controllers, analyzers, and sensors for better visibility and control of your process.

The 3017M’s reliability and low-maintenance design ensure the collection of reliable data with minimal effort.

  • Accurate and reliable – Measures free or total chlorine in drinking water or municipal wastewater final effluent using the DPD colorimetric method. This highly accurate method of analysis provides reliable data for process optimization and reporting.
  • Low maintenance – Flow Injection Analysis (FIA) simplifies maintenance and saves you time. Simplified tubing and low reagent use reduce the frequency of instrument maintenance.
  • EPA & ISO compliant – The 3017M is compliant with US EPA regulations 40 CFR 141.74 (drinking water) and 40 CFR 136.3 (wastewater) and the 3017M measurement method conforms with standard method 4500-CL-G and US EPA method 334.0, which makes it suitable for drinking water permit reporting in the United States. In addition, the 3017M measurement method conforms with ISO method 7393-2.
  • Factory calibrated – Eliminates the need for regular calibration.

Primary applications include:

  • Monitoring residual chlorine in drinking water for process optimization, alarming, and reporting.
  • Disinfection control, monitoring dechlorination, and process optimization in wastewater.

Secondary applications include:

  • Monitoring chlorine levels in cooling towers to control corrosion and slime/algae build-up.
  • Monitoring chlorine levels in aquaculture and aquatic habitats to protect aquatic ecosystems.


Measurement Method
N, N-Diethyl-p-phenylenediamine (DPD)
Measurement Range 0-5 mg/L free or total chlorine, reagent dependent
Measurement Interval Programmable; 2.5 to 60 minutes
Accuracy ±0.03 mg/L or ±5%, whichever is greater
Limit of Detection 0.03 mg/L
Calibration Factory calibrated, 1-point if required
Resolution 0.01 mg/L
Display 2.8 x 6 cm backlit LCD
Enclosure IP66 (with door latched)
Instrument Dimensions 16.8 x 14.8 x 7.4 inches (42.7 x 37.6 x 18.8 cm)
Mounting 4 mounting struts bolted to back of unit
Instrument Shipping Weight <18 lbs ; 8 kg
Warranty 2 year warranty
Regulatory Compliance US EPA regulations 40 CFR 141.74 and 40 CFR 136.3; Standard method
4500-CL-G; US EPA method 334.0; ISO method 7393-2
Certification CE, cETLus
Language English, French, German, Italian, Spanish
Sample Requirements
Sample Flow Rate to Sample Inlet Device 50 to 1,000 mL/min when using Sample Inlet Device
Inlet Pressure 1 to 20 psig with Sample Inlet Device
Sample Temperature Range 41 to 113 °F (5 to 45 °C)
Reagents and Requirements
Reagent Sets 330006 – Reagent set for measuring total chlorine; includes total chlorine
indicator, total chlorine buffer, and DPD powder
330007 – Reagent set for measuring free chlorine; includes total chlorine
indicator, total chlorine buffer, and DPD powder
Reagent Consumption ~30 days per bottle at at 2.5 minute measurement interval
Reagent Storage Life (before hydration) Buffer and indicator, 5 years
DPD powder , 1 year
Reagent Bottle Volume (after hydration) 0.5 liter
Power and Communication
Power 115-230 VAC , 50-60 Hz, 70VA
Relays Two relays rated at 6A, 30VDC
Analog Output One 4-20 mA configurable output
Digital Output RS-485 Modbus RTU
Light Source Class 1 LED; wavelength centered at 525 nm
Light Path Length >1 cm
Storage Temperature Range 41 to 158 °F (5 to 70 °C)
Operating Temperature Range 41 to 131 °F (5 to 55 °C)
Relative Humidity 90% at 40°C non-condensing
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