3. Description
DEPOLOX® 400 M
26
EN
Membrane sensor
TC3 (total chlorine)
Membrane sensor
FC2 (free chlorine)
Measured value
Total chlorine (= free ch
combined chlorine)
Free chlorine
Range
0.05 to 20.00 mg/l (ppm)
Area of application
Swimming pool, drinking and
process water
Swimming pool and drinking
water
Measuring principle
Membrane-covered, amperometrically operating potentiostatic
3-electrode system with integrated electronics
pH measuring range
pH 4 to pH 12, reduced pH-value
dependency
pH 4 to pH 9, reduced pH-value
dependency
Conductivity of the
sample water
10 µS/cm to 50 mS/cm
10 µS/cm to 2500 µS/cm
Max. permissible
operating pressure
1.5 bar (21.76 PSI) with suitable flow cell, no pressure surges and/or
vibrations. Observe the back pressure of the flow cell!
Installation position
Vertical, measuring electrode pointing downward, flow from below
Operating tempera-
ture
-
41 to 113 °F (5 to 45 °C)
Sample water
temperature
32 to 113 °F (0 to +45 °C) (no ice
crystals in the sample water)
-
Ambient tempera-
ture
32 to 131 °F (0 to +55 °C)
-
Temperature
compensation
Automatic, through integrated
temperature sensor. Sudden tem-
perature changes must be avoi-
ded.
Automatic, through integrated
temperature sensor.
Nominal span (with
pH 7.2)
10 µA/ppm
10 to 15 µA/ppm
Running-in time
For first commissioning approx. 2 hours.
Response time
T
90
: approx. 2 min.
Zero point alignment Not necessary.
Cross-sensitivity/
impurities
ClO
2
: Factor 1
O
3
: Factor 1.3
Corrosion inhibitors can lead to
measurement errors.
Water hardness stabilizers can
lead to measurement errors.
ClO
2
: Factor 0.75 O
3
: Factor 0.8
Combined chlorine can increase the
measured value. Corrosion inhibi-
tors can lead to measurement
errors. Water hardness stabilizers
can lead to measurement errors.
Absence of disinfectant max. 24 h
Power supply
10 to 30 V DC, 10 mA
5 to 15 V DC, 10 mA
Electronics
Output signal: analog signal 0 to 200 µA
Non-isolated electronics.
Analog internal processing of measured values.
Connection
4-pin connection socket
Dimensions
Diameter: approx. 25 mm (1"), length: approx. 175 mm (6.9”)
Material
Microporous hydrophilic membrane, PVC-U, stainless steel 1.4571
Transport
41 to 122 °F (+5 to + 50 °C) (membrane sensor, electrolyte, membrane cap)
CE
DIN EN 61326-1, 61326-2-3 and RoHS conform
