Hydrological Services Pty Ltd
Wireless Level Transmitter
©
Copyright
WLT420 100-3
Issue 1.20 5 Dec, 2007
4-20mA Pressure
Transducer
1km range
Wireless Level
Transmitter
12V Battery
+
-
Wireless Level
Receiver
4-20mA
output
12V Battery
+ -
1. Product
Overview
The Hydrological Services Wireless Level Transmitter WLT420 has been designed using
surface mount technology to provide a very small, ultra low power and reliable wireless 4 to
20mA transmitter / receiver pair that can be used in harsh environments for extended periods.
The Wireless Level Transmitter’s primary purpose is to periodically measure a 4-20mA
transducer, and to wirelessly transmit the measurement to a different location and reproduce
the 4-20mA signal. This is done with a very low power consumption (typically 150uA while
asleep) which makes it ideal for remote sites where long battery life is important. The
receiver also has an LCD to display the water level, current measurement and other
parameters.
