11
Version 2.1
Update: April 2016
PONSEL Mesure
– Aqualabo Contrôle
35 Rue Michel Marion
– 56850 CAUDAN, FRANCE
Tel.: +33(0)2 97 89 25 30
– Fax: +33(0)2 97 76 55 72
2.2.6 CTZN sensor: inductive conductivity.
The operation of the CTZN sensor is based on a conductive induction measurement principle.
A ring-type coil is excited at a fixed frequency and the response is retrieved on a second coil, linked to
the excited coil. The coupling between the coils varies depending on the conductivity of the conducting
solution present.
Measurements
Measurement principle
Inductive conductivity sensor with temperature compensation
Conductivity measurement range
0.0 to 100.0 mS/cm
Resolution
0.1
Salinity measurement range
5-60 g/kg
Operating temperature
0 to 50 °C
Temperature compensation
Via an NTC thermistor or an external measurement
Measurement accuracy of T°C
0.1 °C over a range of 0-40 °C
Response time
T90<30 s
Storage temperature
-10 °C to 60 °C
Signal interface
Modbus RS-485 and SDI-12
Measurement refresh rate
< 1 second maximum
Power supply for sensor
5 to 28 volts, max. voltage: 30 V
Power consumption
Automatic standby of < 50 µA, warm-up time: 100 ms
When sending via Modbus RS-485/ Range 0-100 mS/cm
Vin 5V
Vin 12 V Vin 24 V
1
measurement/s
31 mA
15.5 mA
11.5 mA
Max. current peak of 700 mA for 2 mS, 350 mA for 150 mS
Sensor
Dimensions
Max. diameter: 62.4 mm, Length: 196 mm
Weight
700 g
Materials in contact with the medium
EPDM, PVC, stainless steel
Maximum pressure when immersed
5 bar
Cable/connection hardware
9-wire shielded conductor, uncoated-strand polyurethane
sleeve
Ingress protection rating
IP68