In-line Chlorine Sensors - KAPTA 2000-AC2

• Maximum pressure: 10 bar
• [Cl-]: > 2 mg/l
• Minimum conductivity: 100 µS/cm
• Response time: < 30 s
• Minimum flow rate recommended: 0.03 m/s
• Operating temperature range: 0 - 40°C​
• Temperature response time: < 15 s/°C
• Weight: 175g

  • Model Number: KAPTA 2000-AC2
  • Data Sheet: Date Sheet File
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  • In-line Chlorine Sensors
  • In-line Chlorine Sensors
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Product Specification

Electrochemical Sensing Module
Chlorine (HOCl, HOBr or ClO2 ) & Temperature

KAPTA 2000-AC2 In-line Chlorine Sensors General description
The KAPTA 2000-AC2 probe has been specifically developed to measure free chlorine (HOCl) and temperature directly within a pressurised pipe for many applications including management and control of a drinking water network, real-time, rapid control of chemical dosing for industrial water processes and cleaning regimes and management of chlorine levels within swimming pools and spas.

The KAPTA 2000-AC2 is an amperometric sensor using a structured photo-polymerised membrane directly on the electrode which suppresses the well-known drawbacks of amperometric sensors with electrolyte, such as pressure and flow sensitivity, and enables the probe to be installed directly within pipes up to 10 bar flow pressure without flow or pressure control.

The sensor principal also eliminates the need for field re-calibration and on-going routine membrane replacement allowing both long-term stability of the signal and reduced maintenance costs. The principal of the measurement is based on a Clark-type cell with a working, counter and reference electrode.

The sensor design includes a simple replaceable head which is easy to handle and requires no reagent or electrolyte. As the lifetime of the sensor can vary with the application, this design allows more flexibility and price improvement for critical applications.

KAPTA 2000-AC2 In-line Chlorine Sensors Benefits
• Real-time water network monitoring
• No on-going membrane / electrolyte maintenance
• Chemical free operation

KAPTA 2000-AC2 In-line Chlorine Sensors Main features
• Amperometric sensor
• Measurement of the main disinfection species: HOCl, HOBr or ClO2
• User replaceable sensing head
• Inline monitoring at up to 10 bar pressure
• Easy conditioning
• > 1 year shelf life

KAPTA 2000-AC2 In-line Chlorine Sensors Typical applications
• Water quality control
• Drinking water security
• Industrial process control
• Chemical dosing measurement and control
• RO membrane security
• Swimming pool water quality
• Cooling towers
• Fish farming

KAPTA 2000-AC2 In-line Chlorine Sensors Specifications

General specifications
• Detection of active chlorine (HOCl, HOBr or ClO 2)  (0 – 5 mg/l or 0 – 2 mg/l)
• Integrated temperature sensor PT1000 (0 - 40°C)
• Maintenance free for at least 9 months (continuous use) depending on application
• Reagent free probe
• Real in-situ, online active chlorine measurement
• Miniaturized low power consumption sensor probe for the voltage version output
Maximum pressure
10 bar
Minimum conductivity
100 µS/cm
> 2 mg/l 
Response time
< 30 s
pH range
5 - 9
Lower pH than 5 can damage 
the sensor head irreversibly

Maximum chlorine
The lifetime of the sensor can be 
reduced if higher concentration 
than 5 ppm is used.

Measurement accuracy
±2% and min. ±0.03 ppm at 
pH 7 in potable water

Minimum flow rate
0.03 m/s
Operating temperature 

0 - 40°C
Temperature response 

< 15 s/°C
Requires external galvanic isolation
Wetted material
PVC and Viton® O-ring seals
Probe cable length
3 m (specificities can be obtained 
upon request)

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