Hefer

Hefer O3-3000C Online Ozone Analyzer and PME Sensor Systems

Online dissolved ozone (O3) measurement in drinking water, bottling and wastewater processes with a Hefer PME potentiostatic ozone sensor, the O3-3000C controller (0.01-20 ppm) and the CL-2030 transmitter.

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Technical specifications

Hefer ozone analyzer panel: a Model 3000 controller with an LCD and five keys beside a blue electrode in a clear acrylic sample cell, inside a wall-mount enclosure

O3-3000C controller	0.01-20 ppm O3; resolution 0.01 / 0.001 ppm (scale dependent); accuracy ±2% of the reading; 2 × SPDT control relays (On/Off, PWM, PFM) + 1 × SPDT alarm relay, 5 A dry contacts; isolated 4-20 mA output
PME ozone sensor	Potentiostatic measurement with two platinum electrodes (epoxy body, 12 mm) and a double-junction ceramic reference; mounted in an acrylic flow cell; automatic temperature compensation with a Pt100 sensor
CL-2030 transmitter	For chlorine / dissolved ozone: 2-wire DIN-rail transmitter with isolated 4/20 mA output and 10-30 VDC supply
Enclosure	IP-65 wall-mount enclosure with a clear door and two locks (350 × 350 × 180 mm); keyboard lock option
Calibration	3-way sample / zero valve; one-point field calibration takes no longer than 2 minutes

The Hefer O3-3000C is an online analyzer that monitors dissolved ozone (O₃) continuously in the range of 0.01-20 ppm with a PME potentiostatic sensor and a microprocessor controller. The controller relays can drive an ozone generator on/off or proportionally (PWM or PFM), so the unit can be used for closed-loop ozone control in drinking water, bottling plants and industrial disinfection lines. The model is also written O-3000-C. As the Hefer distributor in Turkey, Mikron Proses (Üsküdar, Istanbul) supplies, commissions and calibrates Hefer analyzers.

System components

Hefer PME ozone sensor: a potentiostatic sensor with two platinum electrodes, mounted in an acrylic flow cell. Automatic temperature compensation is done with a Pt100 temperature sensor.
O3-3000C controller: a microprocessor controller for the 0.01-20 ppm O₃ range. Its two SPDT control relays work as On/Off, PWM or PFM outputs, and a third SPDT relay serves as the alarm output. The isolated 4-20 mA output can be sent to a control device, computer or data logging system.
CL-2030 transmitter: a 2-wire, DIN-rail mounted transmitter for chlorine and dissolved ozone, with an isolated 4/20 mA output and a 10-30 VDC supply.

The analyzer is delivered in an IP-65 enclosure with a clear door and two locks; the controller has an optional keyboard lock. A 3-way valve supplies both the sample water and the zero sample, so a one-point calibration can be done in the field in no longer than 2 minutes.

Applications

Online residual ozone monitoring in ozone disinfection lines
Ozonation control in drinking water, bottling and beverage plants
Closed-loop ozone generator control in wastewater treatment and advanced oxidation processes

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 O3-3000C Online Ozone Analyzer and PME Sensor Systems

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