Stop by BOOTH 649 for information on our simple, effective and economical system designed to measure water level using a datalogger and pressure sensor. Normally sold with the datalogger is our 0.39" miniature submersible level sensor the MTM3211 Series. However, the VL4511 Series offers similar performance with a 3/4" diameter housing and the VL5000 Series features a 1" diameter housing which are both compatible with the Datalogger. When used with the MP11 Moisture Protection option you can expect maintenance free operation for up to 10 years.