LS03 Series

Level Sensor with magnet floats


Compact standard sensor for level sensing in tanks.  The sensor is especially designed for lateral installation in tanks so that it has to be mounted horizontally for precise function.


Two designs are available:

PP (Polypropylene) for water resp. dilute acids.

PA (Polyamide) for use in oil, petrol and brake fluid.

Form A and form B types are available. The standard termination is a PVC round-cable with a cross section of 0.14mm² and a length of 500mm. The cable can be modified on request.


Tank monitoring in household appliances, automotive applications as well as in the test, measurement and control industry.


Dimension Drawing


The standard termination is a two-wire round cable with a cross section of 0.14mm². The standard length of the cable is 500mm. Other lengths can be supplied on request. The required length has to be noted on the part number.

The cable end can be supplied with the following connection styles (please note after the length in the part number).


W Cable end cut, dismantled on 30mm, cores stripped and tinned 5mm(0.2inch)
X Individual crimped terminals 1mm(0.04inch) diameter
Y Individual
U Cable with connection socket 3-poles


Contact Data

Contact type 71 74 84
Contact form A/B dry A/B dry A/B dry
Rated Power max. (W) 10 30 10
Switching voltage max. (VDC) 200 200 VDC/250 VAC 400
Switching current max. (A) 0.5 1.0 0.5
Carry current (A) 1.0 2.5 1.0
Contact resistance max. (mOhm) 150 150 150
Breakdown voltage (contact/contact) min. (VDC) 250 500 700
Operating time incl. bounce (ms) 0.5 0.5 2.0
Releasing time (ms) 0.1 0.1 0.1
Operating/storing temperature PA (°C) -20/+100
Operating/storing temperature PP (°C) -20/+90

Other switches by request.

Materials PA

Shaft, nut Polyamide black
Float Polyamide natural white
Seal Nitrile caoutchouc


Materials PP

Shaft, nut Polypropylene black
Float Polypropylene natural white
Seal Nitrile caoutchouc


Order information

Ordering example

LS03 – 1A71 – PA – 500 W

LS03 level sensor, switch type 1A71, material PA, cable length 500mm, connection style W

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