Xylem WQ pH SENSORS - Manual (Page 10)

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VI. Conductivity Sensor
a. Conductivity sensor specifications.
Output: 4-19mA
Range: 0-5000 uS
Accuracy: 1% of full scale
Operating Voltage: 12VDC (+ 5%)
Current Draw: 6.5 mA plus sensor output
Warm Up Time: 3 seconds minimum
Operating Temperature: -40°C to +55°C
Size of Probe:
1" diameter x 12" long
Weight: 1 lb.
Temperature compensation: 2% per °C
Electrodes:
316 Stainless Steel
b. The Conductivity sensor is a three-wire sensor. Three wire sensors
use the red wire for positive voltage, the white wire for the output
signal, and the black wire for ground. Warning: Always connect the
sensor with the power turned off.
c. The Conductivity sensor may be stored without any special provisions.
Place the sensor inside a bag to keep the sensor clean and store on a
shelf or hang it on a wall.
d. The Conductivity sensor has two stainless steel electrodes. The
outside electrode is a ring and the inside electrode is a wire. The
Conductivity sensor measures the ability of a solution to conduct an
electric current between the two electrodes. The sensor can be used
to measure either solution conductivity or total ion concentration of
aqueous samples.
e. The Conductivity sensor is automatically temperature compensated
using an internal thermister. Therefore the sensor will give the same
conductivity in a solution that is at 15 °C as it would if the same
solution were warmed to 25°C. This means that one calibration can