Standard Range Level Switches

electric version

Standard Range Level Switches

Type A 01 041

Nominal pressurePN 25 according to EN/DIN
Operating temperature0 to 300°C
Ambient temperature0 to 70°C
Density of the liquidmin. 0.7 kg/dm³
Operating differential12 mm, fixed
Wetside materialStainless steel (CrNiMo)
Housing materialseawater resistant die cast aluminium
Flangesquare 92 x 92 mm, 92 mm PCD
Switch elementMicroswitch SPDT with silver contacts
Switch rating250 VAC, 5 A / 30 VDC, 5 A
EnclosureIP65
Overall length (tank)226 mm
Safety Integrity Level (SIL)SIL 1 (Type AA 01 041: SIL 2)

Similar Types

Type A 01 04
same as A 01 041, in addition, rod extensions G1, G2 and G3 can be used.


Type 5A 01 041
for aggressive environments, housing exclusively made of stainless steel (CrNiMo)

Typical applications: shipbuilding, refrigeration, chemical engineering, food industry, pulp and paper, drinking water supply, sewage treatment etc.


For contaminated or crystallizing media.

Bellows to prevent jamming of the float mechanism.

Type A 01 051
Bellow materialPerbunan
Operating temperature0 to 120°C
Safety Integrity Level (SIL)SIL 1 (Type AA 01 051: SIL 2)
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Type A 01 052
Bellow materialSilicon
Operating temperature0 to 200°C
Safety Integrity Level (SIL)SIL 1 (Type AA 01 052: SIL 2)
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Type A 01 053
Bellow materialFPM
Operating temperature10 to 200°C
Safety Integrity Level (SIL)SIL 1 (Type AA 01 053: SIL 2)
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Type A 01 054
Bellow materialPTFE
Operating temperature0 to 250°C
Safety Integrity Level (SIL)SIL 1 (Type AA 01 054: SIL 2)
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Overall length253 mm
Density of the liquid0.75 kg/dm³
Other technical data same as Type A 01 041

For submersible applications.

With fitted cable and IP68 enclosure.

Type U3A 01 04
Type U5A 01 04
Type U11A 01 04
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Nominal pressurePN 25 according to EN/DIN
Operating temperature-30 to 80°C
Ambient temperature-30 to 80°C
Density of the liquid0.7 kg/dm³
Operating differential12 mm, fixed
Wetside materialstainless steel (CrNiMo)
Housing materialseawater resistant die cast aluminium
Flangesquare 92 x 92 mm, PCD 92 mm
Switch elementMicroswitch SPDT with silver contacts
Switch rating250 VAC, 5 A / 30 VDC, 5 A
EnclosureIP68
Length of encapsulated cable3 m, or as required
Cable typeNeoprene (H07 RN-F)
Safety Integrity Level (SIL)SIL 1 (Types U3AA 01 04, U5AA 01 04, U11AA 01 04: SIL 2)

For manually adjustable operating differentials.

Ideal for 2-point control, e.g. pump control.

Type A 01 090Operating differential 37 to 218 mm
Type A 01 091Operating differential 56 to 317 mm
Type A 01 092Operating differential 83 to 442 mm
Type A 01 093Operating differential 97 to 557 mm
Type A 01 095Operating differential 34 to 190 mm
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Nominal pressurePN 25 according to EN/DIN
Operating temperature0 to 300°C
Ambient temperature0 to 70°C
Density of the liquidmin. 0.75 kg/dm³
Operating differential12 mm, fixed
Wetside materialstainless steel, CrNiMo
Housing materialseawater resistant die cast aluminium
Flangesquare 92 x 92 mm, PCD 92 mm
Switch elementMicroswitch SPDT with silver contacts
Switch rating250 VAC, 5 A / 30 VDC, 5 A
EnclosureIP65
Overall length278 to 561 mm, depending on type
Safety Integrity Level (SIL)SIL 1 (Types AA 01 090 - 095: SIL 2)

For separating layer monitoring.

For interface application

The position of the weight is calculated in reference to the densities of the media and is factory preset.

Type A 01 08T1
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Nominal pressurePN 25 according to EN/DIN
Operating temperature0 to 300°C
Ambient temperature0 to 70°C
Density of heavier liquidsmin. 0.8 kg/dm³
Difference in densitymin 0.22 kg/dm³
Operating differentialapprox. 20 mm
Rod length100 mm, 200 mm or 300 mm
Weightapprox. 2.4 kg
Wetside materialstainless steel (CrNiMo)
Housing materialseawater resistant die cast aluminium
Flangesquare 92 x 92 mm, PCD 92 mm
Switch elementMicroswitch SPDT with silver contacts
Switch rating250 VAC, 5 A / 30 VDC, 5 A
EnclosureIP65
Overall length309 mm, 409 mm or 509 mm
Safety Integrity Level (SIL)SIL 1 (Type AA 01 08T1: SIL 2)

Marine approvals and registrations of Trimod'Besta limit switches


Electric and pneumatic level switches are available to the marine industry, in light, heavy duty and explosion proof versions.


Safety Integrity Level (SIL)


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