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General Catalog 193-13
AS2/ AS3
AS2/ AS3
Free chlorine and chlorine dioxide sensors
AS2/ AS3


Complete measuring system (assembly sold separately)
• For hot sanitary water, drinkable water
• pH must be constant (for free chlorine)
• Temperature: up to 50 °C or up to 70 °C
• Pressure: up to 8 bar
APPLICATIONS
Concentration measurement of free chlorine or chlorine dioxide, hot sanitary water and drinkable water.
Caution: The pH must be constant for free chlorine measurement.
TECHNICAL FEATURES
Measured parameter
:
AS ... CL: Free chlorine
AS ... CD: Chlorine dioxide
Disinfection additives
:
Inorganic compounds, such as NaOCl, Ca(OCl)₂, gaseous chlorine, chlorine produced by electrolysis
Chlorine dioxide
:
Chlorite/ Chlorine; Chlorite/ Acid
Measuring system
:
Semi-open cell with 3 electrodes and electrolyte
Supply voltage
:
12 ... 30 V DC, (Load 500 to 900Ω)
Output signal
:
4 ... 20 mA, screw connectors x2 (1mm²)
No galvanic insulation
Operating temperature
:
AS2: 1 to 50°C; AS3: 1 to 70°C
Automatic temperature compensation
Ambient temperature
:
From 0 to 55 °C
Operating pressure
:
8 bar max.
Cleaning system
:
Equipment RV1 (option)
Flow rate
:
Flow must be constant
15 l/h min. without RV1 equipment
45 to 90 l/h with RV1 equipment
pH operating range
:
AS ... CL: pH must be constant +/- 0.25 pH (between 5 and 9 pH)
AS ... CD: between pH 1 and pH 12
Zero adjustment
:
Not necessary (from factory)
Slope calibration
:
Only 1 point necessary with BAMOPHAR 194:
- Chlorine: DPD-1
- Chlorine dioxide: DPD-1 (without chlorine)
Interferences
:
AS ... CL: Ozone, chlorine dioxide and chlorite
AS ... CD: Ozone, chlorine, chlorite are measured (less than 2% of their concentration)
Materials
:
AS2: PVC-U; AS3: PEEK
Dimensions
:
O.D. 25 mm, length 220 mm (4-20 mA)

 

EC Conformity: The instrument meets the legal requirements of the current
European Directives
 
Equipment for automatic cleaning of electrodes: RV1 (Option)
 
- Recommended to optimize the measurement signal
- Direct installation on the sensor tip
- Cleaning action on small deposits (e.g. slight rust deposit)
- Electrode cleaning each 6 to 12 months (instead of each 4 to 12 weeks without RV1)
- Requires the use of DF measuring cells (See data-sheet 193-95)
- Flow-rate: 45 l / h Min.
 
Benefits:
- Increased sensor performance (reduced maintenance)
See diagram on page 2
General Catalog 193-13
27/11/2018 17:37
Free chlorine and chlorine dioxide sensors
AS2/ AS3
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