Hefer

Hefer CL Series Online Chlorine Analyzers and PME Sensor Systems

Online free chlorine measurement in drinking water, wastewater and process lines with Hefer PME potentiostatic chlorine sensors, CL-3000C and CL5000C controllers and the CL-2030 2-wire transmitter.

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Technical specifications

Hefer CL 5000 chlorine analyzer: a controller with a red digital display and keypad above a clear acrylic sample cell with a blue electrode, in an enclosure with an open clear door

CL-3000C controller	0.01-20 ppm; resolution 0.01 / 0.001 ppm; accuracy ±2% of the reading; 2 × SPDT control relays (PWM / PFM / On-Off) + 1 × alarm relay; isolated 4-20 mA output
PME chlorine sensor	Potentiostatic sensor with two platinum electrodes, used in a flow cell; automatic temperature compensation; free chlorine measurement, with an optional total chlorine sensor
CL-2030 transmitter	2-wire, 4/20 mA isolated output, LCD display, DIN-rail mounting, 10-30 VDC supply
CL5000C dual range	0.001-2.000 ppm and 0.01-20 ppm dual-scale chlorine controller
Enclosure	IP-65 enclosure with a clear door; keyboard lock option
Calibration	3-way sample / zero valve; one-point field calibration takes no longer than 2 minutes

The Hefer CL series measures free chlorine in drinking water, wastewater and industrial process lines with a potentiostatic PME sensor. The CL-3000C controller covers 0.01-20 ppm, the CL5000C adds a 0.001-2.000 ppm scale, and the CL-2030 is a 2-wire transmitter for a 4-20 mA signal. The controller is also written CL-3000-C. As the Hefer distributor in Turkey, Mikron Proses (Üsküdar, Istanbul) supplies, commissions and calibrates Hefer analyzers.

System components and models

Hefer PME sensor: a potentiostatic measuring body with two platinum electrodes. It works in a flow cell under fixed hydraulic conditions and gives a reading with automatic temperature compensation. An optional sensor for total chlorine is available.
CL-3000C controller: a microprocessor controller for the 0.01-20 ppm range. Its two SPDT control relays (On/Off, PWM or PFM) can drive chemical dosing pumps directly; it also has one alarm relay and an isolated 4-20 mA analog output.
CL-2030 transmitter: a compact 2-wire transmitter with an isolated 4/20 mA output, an LCD display and DIN-rail mounting.
CL5000C dual-range model: a controller with 0.001-2.000 ppm and 0.01-20 ppm scales, for low-range chlorine measurement such as drinking water outlets.

Calibration and enclosure

An integrated 3-way valve switches between the sample water and the zero reference water. A one-point calibration can be done in the field in no longer than 2 minutes. The analyzer comes in an IP-65 enclosure with a clear door, and the controller has an optional keyboard lock.

Applications

Continuous free chlorine control at drinking water treatment and chlorination stations
Biocide dosing and free chlorine residual monitoring in cooling towers
Chlorine monitoring at wastewater disinfection and neutralization outlets
Microbiological safety in food and beverage washing and process water

Datasheets and manuals

Documents were last compared with the manufacturer's source on 2026-08-23.

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Send us your requirement for Hefer CL Series Online Chlorine Analyzers and PME Sensor Systems

Describe your application; we will help you identify the right model and configuration.