LSG is a float level switch designed for liquid level control in marine and industrial fields.
Typical applications are high and overfilling protection, water presence detection, high and low alarm level of liquids with or without foam.
Inside the float is placed a toroidal magnet which drives, without contact, a switch located inside the guide pipe; instrument have to be supplied with a constant voltage of 24Vdc (for example by means of VALCOM® TSU400 barrier) in order to provide two constant current output values related to alarm thresholds (On=6mA / Off=14mA). Switch replacement can be done without dismantling instrument from the process and doesn’t need any recalibration. LSG can be used also in ON/OFF mode (simple connection).


Detection of water presence and level in overfill pipes. Simple system for high and low level detection in all tanks, wells, etc. Systems in accordance to IMO and Coast Guard for high & overfill alarms on tankers and chemical tankers.

Simple apparatus suitable for use in classified hazardous areas (Ex) according to EN 60079-11:2012 standard.


Level On-Off

Measure Principle

Reed Switch

Measuring Range

On – Off Switch

Process Temperature

Standard: -20 ÷ +85°C
Finned body: -40 ÷ +130°C

Process Connection

Standard Screws



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