6
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 Digital sensors.
The digital sensors in the PONSEL range are equipped with galvanic isolation and can perform digital
signal processing to optimize the reliability of the measurements and data sent to the ACTEON 5000
terminal.
All the data regarding the calibration, calibration history, users and measurements is processed
directly within the sensor and transmitted via a Modbus RS-485 link.
The range of digital sensors can be used to measure a variety of parameters: temperature, dissolved
oxygen, pH, redox potential, conductivity (4-electrode or inductive measurement principle), turbidity
and suspended solids.
2.2.1 OPTOD sensor: dissolved oxygen (optical technology).
The OPTOD dissolved oxygen sensor applies the luminescence-based optical measurement
technology and measures reliably and accurately without requiring calibration.
With no consumables or maintenance required, the OPTOD sensor gives an immediate return on the
investment. The only intervention required is to replace the DO disk every two years.
Since it does not consume oxygen, the OPTOD sensor can be used in all media; even when there is a
very weak flow of water.
The body is made of passivated 316 L stainless steel or
Titanium
for applications in corrosive media.
Measurements
Measurement principle
Luminescence-based optical measurement
Measurement ranges
0.00 to 20.00 mg/L
0.00 to 20.00 ppm
0-200%
Resolution
0.01
Accuracy
+/- 0.1 mg/L
+/- 0.1 ppm
+/- 1 %
Response time
90% of the value in less than 60 seconds
Recommended measurement frequency
> 5 s
Water movement
No circulation required
Temperature compensation
Via an NTC thermistor
Storage temperature
- 10 °C to + 60 °C
Temperature measurement range
0 °C to 50 °C
Accuracy
+ /- 0.5 °C
Signal interface
Modbus RS-485 (or SDI-12)
Power supply for sensor
5 to 12 volts
Power consumption
Standby: 25 µA
When sending via RS-485 (1 measurement/second): 4.4 mA
When sending via SDI-12 (1 measurement/second): 7.3 mA
Current pulse: 100 mA
Warm-up time: 100 mS
Sensor
Dimensions
Diameter: 25 mm; Length not including cable: 146 mm
Weight
Stainless steel version: 450 g ( 3 m of cable)
Titanium version: 300 g ( 3 m of cable)
Material in contact with the medium
Passivated 316L stainless steel.
New
:
Titanium body
Maximum pressure
5 bar
Cable
9-wire shielded conductor, uncoated-strand polyurethane
sleeve
Ingress protection rating
IP68
