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 TSU400FM barrier) in order to provide two constant current output values related to alarm thresholds (On=5mA / Off=13mA).

Switch replacement can be done without dismantling instrument from the process and doesn’t need any recalibration.

TSU400 FAULT MONITOR series galvanically isolated safety barriers are designed for connection to ON-OFF sensors (two wire) having a current or frequency output.

Inputs are constantly monitored to reveal any possibly wiring anomaly (such as short circuit, open circuit or dispersion to ground ). The ON-OFF signals from the sensors are retransmitted to the output with the control signals separated for each channel. The presence of bicolour LED’s in input and output circuits permits to locally monitor the status of barrier and sensors.

The small size of the housing and the presence of two channels per unit offer the possibility of a high density wiring on DIN rail 35mm.

ASL-400 is designed for marine and on-land applications for liquid detection, pump control, water ingress alarm systems, for high and low alarm level, overfilling protection on liquids with or without foam.

ASL-400 works on the principle of distributed acoustic waves in a metal rod. If the rod is not covered by the liquid the sound waves are dispersed freely without any interference.

If liquid covers the rod the emission of sound waves is muffled and this interference is picked up by the piezoelectric sensor and converted into a current signal in the current loop (on-off).

These instruments have no moving parts, no vibration, no optical or capacitive detectors. They are pure static sensors offering the maximum reliability. Available IP65, IP68 en ATEX.

DE STHOP high and overfilling alarm system
- high 95% and overfilling 98%
- switching accuracy 1-3mm
- IMO A686 resolution
- USCG 46 CFR part 39-20.7
- G.L., Lloyd, R.I.NA, K.R.
- further see documentation