Xylem WQ pH SENSORS User Manual
Page 5
Global Water
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f. The sensors may be pulsed on or turned on by the logging system
prior to taking a reading. Use a warm up time appropriate to the water
quality sensor you are using to assure that the sensor is fully on. The
sensors can run continuously for real time applications. Each sensor
draws between 4 and 19mA depending on whether the sensor is
reading at the minimum or maximum of its range.
Groundwater
g. Sensors may be suspended in 2” monitoring wells near the well
screen. Several sensors may be suspended in the same well by
staggering the sensors one foot apart.
Surface Water
h. Sensors may be submerged at the monitoring point and hung from
their cables. It is recommended to protect the sensors inside a 4” PVC
drainpipe that will act as a protective stilling well. Put a cap on the
bottom end of the pipe to allow easy water flow past the sensors.
Drop the sensor until it touches the bottom of the stilling well and then
pull it up slightly and secure the cable.