Liquid Level Switches

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Liquid level switches are used to detect and control the level of liquids in tanks, reservoirs & pipelines to monitor and maintain desired liquid levels. They work on the principle of...Read more

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Liquid Level Switches

StyleModelMPNPrice (inc. VAT)
A9037HG34Z209037HG34Z20£265.99
A9037HG35R9037HG35R£233.55
A9037HG38Z209037HG38Z20£274.15
B9037HR329037HR32£697.59
C9037HW329037HW32£724.73
D9038CW369038CW36£1,464.70
E9049A6A9049A6A£237.72
F9049EF29049EF2£137.78
G9049ER29049ER2£27.70
G9049ER79049ER7£28.00
H9998PC3389998PC338£26.06
MADISON -

Open On Rise Liquid Level Switch

StyleModelFloat MaterialFloat LengthFloat Dia.Body MaterialOperating Temp.MountingMax. CurrentStem MaterialPrice (inc. VAT)
AM3782Buna N1"1"Brass, PBT221°FVertical Open Tank0.28ABrass£143.97
BM3326Polypropylene0.63"0.58"Polypropylene221°FVertical Open Tank0.12APolypropylene£32.75
CM3326-NPTPolypropylene0.63"0.58"Polypropylene221°FVertical Open Tank0.12APolypropylene£43.36
DM4035Polypropylene11/25"0.78"Stainless Steel221°FVertical Open Tank0.12AStainless Steel£53.89
EM8800-PRPolypropylene2"1 1/2"Polypropylene221°FVertical Open Tank1APolypropylene£125.64
FM8000-CPolypropylene3/4"7/8"PVC, Polypropylene140°FVertical Open Tank0.28APVC£29.33
GM3827-3Stainless Steel1"1.54"Stainless Steel392°FHorizontal0.28AStainless Steel£157.76
HM3827-2Stainless Steel1"1.54"Stainless Steel392°FHorizontal0.28AStainless Steel£135.24
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Close On Rise Liquid 2-Level Switch

StyleModelFloat Dia.Operating Temp.MountingHeightFloat PositionFloat TravelSwitch FunctionContact FormPrice (inc. VAT)
A9038CG36N42 1/2"-22°F to +220°FHorizontal5.94"Left6 1/2"Close On RiseDPST£819.43
B9038CG36N4LZ202 1/2"250°FHorizontal5.94"Left6 1/2"Close On RiseDPST£764.73
C9038AG1N47"-22°F to +220°FVertical Open Tank4 1/2"Below1 1/4"Close On RiseDPST£324.59
MADISON -

Selectable Drum Liquid Level Switch

StyleModelFloat MaterialFloat LengthBody MaterialOperating Temp.MountingStem MaterialFloat Specific GravitySwitch FunctionPrice (inc. VAT)
AM4168-3Buna N1 1/4"Brass221°FVertical Open TankBrass0.5Select£226.80
BM4169-3Stainless Steel1.59"Stainless Steel302°FVertical Open TankStainless Steel0.73Select£342.72
BARKSDALE -

Liquid Level Switches

StyleModelSwitch FunctionContact FormVa RatingFloat MaterialBody MaterialOperating Temp.MountingMax. VoltagePrice (inc. VAT)
A0111-588---------
RFQ
B0112-1110---------
RFQ
C0111-609---------
RFQ
B0112-988---------
RFQ
D0111-509---------
RFQ
D0111-510SelectableSPST40 VAPolypropyleneStainless Steel70°FVertical Open Tank230V£348.26
MADISON -

Open On Rise Drum Liquid Level Switch

StyleModelFloat MaterialFloat LengthBody MaterialOperating Temp.MountingStem MaterialFloat Specific GravitySwitch FunctionPrice (inc. VAT)
AM4168-2Buna N1 1/4"Brass221°FVertical Open TankBrass0.5Open On Rise£190.83
BM4169-2Stainless Steel1.59"Stainless Steel302°FVertical Open TankStainless Steel0.73Open On Rise£241.23
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Close On Rise Liquid Level Switch

StyleModelFloat LengthFloat Dia.Operating Temp.MountingMax. VoltageBody MaterialHeightFloat PositionPrice (inc. VAT)
A9037EG94 1/2"3.63"-22°F to +220°FVertical Open Tank575V-5 14/25"Below£324.80
A9037EG84 1/2"3.63"-22°F to +220°FVertical Open Tank575VSteel5 14/25"Below£331.48
A9037EG104 1/2"3.63"-22°F to +220°FVertical Open Tank600VSteel7 3/5"Below£420.36
B9037EW94 1/2"3.63"-22°F to +220°FVertical Open Tank600VAluminum7 3/5"Below£970.90
C9036DG2C7"7"-22°F to +220°FVertical Open Tank575VSteel4.27"Below£100.38
D9036DG27"7"-22°F to +220°FVertical Open Tank575VSteel4.27"Below£81.55
E9038CG36LZ207"2 1/2"-22°F to +220°FHorizontal600VSteel7 1/4"Left£619.41
C9036GW17"7"-22°F to +220°FVertical Open Tank575VSteel5 14/25"Below£864.40
RFQ
C9036GG27"7"-22°F to +220°FVertical Open Tank575VSteel5 14/25"Below£136.62
C9036DR317"7"-22°F to +220°FVertical Open Tank575VSteel4.27"Below£521.34
C9036GW1H7"7"-22°F to +220°FVertical Open Tank600VSteel8 1/4"Below£960.70
F9036DW317"7"-22°F to +220°FVertical Open Tank575VSteel4.27"Below£543.89
G9036FG307"7"-22°F to +220°FVertical Open Tank600VSteel4 1/2"Below£37.71
C9036DR31C7"7"-22°F to +220°FVertical Open Tank600VSteel5 1/4"Below£516.75
C9036GG2H7"7"-22°F to +220°FVertical Open Tank600VSteel5 1/2"Below£187.79
H9038CW337"2 1/2"-22°F to +220°FSide600VAluminum5.94"Right£1,663.54
C9036GR17"7"-22°F to +220°FVertical Open Tank600VSteel8 1/4"Below£939.57
RFQ
C9036DW31C7"7"-22°F to +220°FVertical Open Tank600VSteel5 1/4"Below£556.69
C9036DG2S127"7"-22°F to +220°FVertical Open Tank600VSteel4 1/2"Below£129.80
I9037HG337.13"2.58"-22°F to +220°FHorizontal600VSteel4 11/25"Right£221.61
J9037HW307.13"2.58"-22°F to +220°FHorizontal600VAluminum6.22"Left£804.43
I9037HG387.13"2.58"-22°F to +220°FHorizontal600VSteel5.98"Left£269.22
I9037HG36Z207.13"2.58"250°FHorizontal600VSteel5.98"Left£278.63
I9037HG33Z207.13"2.58"250°FHorizontal600VSteel4 11/25"Right£260.54
K9037HG32LZ207.13"2.58"250°FHorizontal600VSteel5.98"Left£220.73
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Close On Rise Alternator Liquid Level Switch

StyleModelFloat LengthFloat Dia.Body MaterialOperating Temp.MountingMax. VoltageHeightFloat PositionPrice (inc. VAT)
A9038DG84 1/2"3.63"Steel-22°F to +220°FVertical Open Tank600V9.82"Below£779.55
B9038DR84 1/2"3.63"Aluminum-22°F to +220°FVertical600V6.31"Below£2,362.43
A9038DG94 1/2"3.63"Steel-22°F to +200°FVertical Open Tank575V4.87"Below£818.05
A9038DG74 1/2"3.63"Steel-22°F to +220°FVertical Open Tank600V9.82"Below£886.01
C9038DW84 1/2"3.63"Aluminum-22°F to +220°FVertical600V6.31"Below£1,904.88
D9038CW317"2 1/2"Aluminum-22°F to +220°FHorizontal600V5.94"Right£1,541.87
E9038AG1S67"7"Steel-22°F to +220°FVertical Open Tank600V4 1/2"Below£338.76
E9038AG1C7"7"Steel-22°F to +220°FVertical Open Tank600V4 1/2"Below£330.77
F9038CG347"2 1/2"Steel-22°F to +220°FHorizontal600V5.94"Left£695.04
F9038CG33Z207"2 1/2"Steel250°FHorizontal600V5.94"Right£651.70
F9038CG337"2 1/2"Steel-22°F to +220°FHorizontal600V7.22"Right£661.64
F9038CG317"2 1/2"Steel-22°F to +220°FHorizontal600V7.22"Right£576.65
E9038AG17"7"Steel-22°F to +220°FVertical Open Tank600V4 1/2"Below£250.76
F9038CG32Z207"2 1/2"Steel250°FHorizontal600V5.94"Left£645.81
F9038CG34Z207"2 1/2"Steel250°FHorizontal600V5.94"Left£620.47
G9038CG31F37"2 1/2"Steel-22°F to +220°FHorizontal600V5.94"Right£639.97
H9038AR17"7"Aluminum-22°F to +220°FVertical Open Tank600V6.86"Below£949.10
E9038AG1N57"7"Steel-22°F to +220°FVertical Open Tank600V4 1/2"Below£453.25
I9038CW327"2 1/2"Steel-22°F to +200°FVertical Open Tank575V5.94"Left£1,426.30
J9038CG367"2 1/2"Steel-22°F to +220°FHorizontal600V7.22"Left£749.62
F9038CG327"2 1/2"Steel-22°F to +220°FHorizontal600V7.22"Left£712.31
H9038AW17"7"Aluminum-22°F to +220°FVertical Open Tank600V4 1/2"Below£888.92
G9038CG33F37"2 1/2"Steel-22°F to +220°FHorizontal600V5.94"Right£681.34
F9038CG32N57"2 1/2"Steel-22°F to +220°FHorizontal600V5.94"Left£838.38
H9038AW1N57"7"Aluminum-22°F to +220°FVertical Open Tank600V6.86"Below£1,157.44
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Open On Rise Liquid Level Switch

StyleModelFloat LengthFloat Dia.MountingMax. VoltageHeightFloat PositionFloat TravelConduit SizePrice (inc. VAT)
A9036DW31R7"7"Vertical Open Tank575V4.27"Below1 1/4"2 3/4"£526.42
A9036DG2R7"7"Vertical Open Tank575V4.27"Below1 1/4"3 1/2"£87.11
A9036DG2CR7"7"Vertical Open Tank600V4 1/2"Below1 1/4"-£108.73
A9036GG2R7"7"Vertical Open Tank575V5 14/25"Below1 1/4"3 1/2"£158.78
A9036GW1R7"7"Vertical Open Tank600V8 1/4"Below1 1/4"2 3/4"£1,096.51
RFQ
B9037HG34R7.13"2.58"Horizontal600V4 11/25"Left6 1/4"3 1/2"£266.44
B9037HG30R7.13"2.58"Horizontal600V5.98"Left4 1/2"3 1/2"£237.89
B9037HG33R7.13"2.58"Horizontal600V5.98"Right3"3 1/2"£240.44
B9037HG31R7.13"2.58"Horizontal600V5.98"Right4 1/2"3 1/2"£259.44
MADISON -

Close On Rise Ultra Low Level Liquid Switch

StyleModelFloat MaterialBody MaterialMountingStem MaterialFloat Specific GravitySwitch FunctionContact FormFloat LengthPrice (inc. VAT)
AM4400-ULL-NOBuna NStainless SteelVertical Open TankStainless Steel0.44Close On RiseSPST1 4/25"£73.13
BM7000-ULL-NOBuna NPBTVertical Open TankPBT0.44Close On RiseSPST1 4/25"£76.28
CM4500-ULL-NOBuna NBrassVertical Open TankBrass0.44Close On RiseSPST1 4/25"£78.28
DM9000-ULL-NOKynarKynarVertical Open TankKynar0.69Close On RiseSPST1 4/25"£78.39
EM4400-PBT-ULL-NOPBTStainless SteelVertical Open TankStainless Steel0.55Close On RiseSPST1 4/25"£58.56
BM7000-PBT-ULL-NOPBTPBTVertical Open TankPBT0.55Close On RiseSPST1 4/25"£59.99
FM8000-ULL-NOPolypropylenePolypropyleneVertical Open TankPolypropylene0.42Close On RiseSPST1 4/25"£57.21
GM8020-ULL-NOPolypropyleneStainless SteelVertical Open TankStainless Steel0.42Close On RiseSPST1 4/25"£67.12
MADISON -

Open On Rise Ultra Low Level Liquid Switch

StyleModelFloat MaterialBody MaterialMountingStem MaterialFloat Specific GravitySwitch FunctionContact FormFloat LengthPrice (inc. VAT)
AM4400-ULL-NCBuna NStainless SteelVertical Open TankStainless Steel0.44Open On RiseSPST1 4/25"£87.55
BM9000-ULL-NCKynarKynarVertical Open TankKynar0.69Open On RiseSPST1 4/25"£64.38
CM8000-ULL-NCPolypropylenePolypropyleneVertical Open TankPolypropylene0.42Open On RiseSPST1 4/25"£59.96
DM8020-ULL-NCPolypropyleneStainless SteelVertical Open TankStainless Steel0.42Open On RiseSPST1 4/25"£66.89
MADISON -

Close On Rise Liquid Level Switch

StyleModelFloat MaterialFloat LengthFloat Dia.Body MaterialOperating Temp.MountingMax. CurrentStem MaterialPrice (inc. VAT)
AM3326-NPT-NOPolypropylene0.63"0.58"Polypropylene221°FVertical Open Tank0.12APolypropylene£42.43
BM3326-NOPolypropylene0.63"0.58"Polypropylene221°FVertical Open Tank0.12APolypropylene£28.97
CM8000-NOPolypropylene1"1"Polypropylene221°FVertical Open Tank0.28APolypropylene£19.62
DM3827-3NOStainless Steel1"1.54"Stainless Steel392°FHorizontal0.28AStainless Steel£151.82
DM3827-2NOStainless Steel1"1.54"Stainless Steel392°FHorizontal0.28AStainless Steel£135.77
MADISON -

Close On Rise Drum Liquid Level Switch

StyleModelFloat MaterialFloat LengthBody MaterialOperating Temp.MountingStem MaterialFloat Specific GravitySwitch FunctionPrice (inc. VAT)
AM4168-1Buna N1 1/4"Brass221°FVertical Open TankBrass0.5Close On Rise£155.77
BM4169-1Stainless Steel1.59"Stainless Steel302°FVertical Open TankStainless Steel0.73Close On Rise£201.88
MADISON -

Open On Rise Multi-level Liquid Level Switch

StyleModelFloat MaterialFloat LengthFloat Dia.Body MaterialOperating Temp.MountingMax. CurrentStem MaterialPrice (inc. VAT)
AM8085Polypropylene1"1"Polypropylene221°FVertical Open Tank0.28APolypropylene£93.50
BM5605Stainless Steel2"2.13"Stainless Steel392°FVertical Open Tank0.5AStainless Steel£252.74
MADISON -

Selectable Multi-level Liquid Level Switch

StyleModelFloat MaterialFloat Dia.Body MaterialOperating Temp.MountingStem MaterialGaugeFloat Specific GravityPrice (inc. VAT)
AML4444Buna N1 1/4"Polypropylene221°FVertical Open TankBrass22 ga.0.45£397.02
BML8888Polypropylene1 1/2"Polypropylene221°FVertical Open TankPolypropylene23 ga.0.75£365.77
CML5555Stainless Steel2.13"Stainless Steel392°FVertical Open TankStainless Steel22 ga.0.55£623.37
MADISON -

Plastic Single-Point Liquid Level Switches

StyleModelContact FormFloat MaterialFloat LengthFloat Dia.Body MaterialOperating Temp.MountingMax. CurrentPrice (inc. VAT)
AM5900SPDTStainless Steel2"0.63"Stainless Steel392°FHorizontal0.28A£186.83
BM5910SPDTStainless Steel2"0.63"Stainless Steel392°FHorizontal0.28A£188.31
CM8790SPSTPolypropylene1 3/4"1"Polypropylene221°FHorizontal0.28A£17.02
DM7700SPSTPBT2.11"0.65"PBT149°FHorizontal0.28A£19.09
EM9705SPSTKynar2.11"0.65"Kynar221°FHorizontal0.28A£89.25
FM9000SPSTKynar1"1"Kynar221°FVertical Open Tank0.28A£31.48
GM8705SPSTPolypropylene1 3/4"1"Polypropylene221°FHorizontal0.28A£42.11
HM7750SPSTPBT2.11"0.65"PBT266°FHorizontal0.28A£27.10
IM7725SPSTPBT2.11"0.65"PBT266°FHorizontal0.28A£25.33
JM5970SPSTStainless Steel1"1"Stainless Steel392°FHorizontal0.28A£119.49
KM8700SPSTPolypropylene2.11"0.65"Polypropylene221°FHorizontal0.28A£17.90
LM4300SPSTBuna N2"1 1/4"Brass221°FVertical Open Tank0.5A£66.65
MM8750SPSTPolypropylene1 3/4"1"Polypropylene221°FHorizontal0.28A£20.45
NM7000SPSTBuna N1"1"PBT221°FVertical Open Tank0.28A£19.10
OM8000BSPSTPolypropylene1"1"Polypropylene221°FVertical Open Tank0.28A£40.41
PMSB8800SPSTPolypropylene2"1 1/2"Polypropylene221°FVertical Open Tank0.5A£135.49
QM9700SPSTKynar2.11"0.65"Kynar221°FHorizontal0.28A£33.48
RM8710SPSTPolypropylene1 3/4"1"Polypropylene221°FHorizontal0.28A£47.93
SM7790SPSTPBT2.11"0.65"PBT266°FHorizontal0.28A£27.52
TM7740SPSTPBT2.11"0.65"PBT266°FHorizontal0.28A£26.51
UM5917SPSTStainless Steel2"2.13"Stainless Steel482°FVertical Open Tank0.5A£106.13
VM4010SPSTBuna N1"1"Brass221°FHorizontal0.28A£63.87
WM8000SPSTPolypropylene1"1"Polypropylene221°FVertical Open Tank0.28A£16.32
XM8800SPSTPolypropylene2"1 1/2"Polypropylene221°FVertical Open Tank0.5A£75.28
YM8700-CSPSTPolypropylene2.06"1/2"Polypropylene221°FHorizontal0.28A£18.45
MADISON -

Adjustable-Level Liquid Level Switches

StyleModelFloat MaterialFloat Dia.Body MaterialOperating Temp.MountingHeightStem MaterialStem LengthPrice (inc. VAT)
AM4302-7807-6Buna N1 1/4"Brass221°FVertical Open Tank72"Brass70 1/2"£184.54
RFQ
BM5602-7808-1Stainless Steel2.13"Stainless Steel392°FVertical Open Tank12"Stainless Steel10 1/2"£376.64
CM5602-7808-6Stainless Steel2.13"Stainless Steel392°FVertical Open Tank72"Stainless Steel70 1/2"£321.64
RFQ
MADISON -

Stainless Steel Single-Point Liquid Level Switches

StyleModelFloat MaterialFloat LengthFloat Dia.Body MaterialOperating Temp.MountingMax. CurrentStem MaterialPrice (inc. VAT)
AM4190-BUBuna N3"23/25"Stainless Steel221°FHorizontal1ABuna N£397.21
BMS7000Buna N1"1"PBT221°FVertical Open Tank0.28APBT£30.03
CMS9000Kynar1"1"Kynar221°FVertical Open Tank0.28AKynar£45.53
DMS8000Polypropylene1"1"Polypropylene221°FVertical Open Tank0.28APolypropylene£29.17
EMS8800Polypropylene2"1 1/2"Polypropylene221°FVertical Open Tank0.5APolypropylene£81.15
FMSB5600Stainless Steel2"2.13"Stainless Steel221°FVertical Open Tank0.5AStainless Steel£231.70
GM5000Stainless Steel1.19"1.13"Stainless Steel392°FVertical Open Tank0.28AStainless Steel£64.74
HM5600-PRStainless Steel2"2"Stainless Steel392°FVertical Open Tank1AStainless Steel£122.50
IM5920Stainless Steel3/4"0.13"Stainless Steel392°FHorizontal0.28AStainless Steel£168.04
JM4190-HPStainless Steel2 1/25"2 1/25"Stainless Steel302°FHorizontal1AStainless Steel£319.08
KMS5917Stainless Steel2"2.13"Stainless Steel482°FVertical Open Tank0.5AStainless Steel£112.95
LM4190Stainless Steel4"1"Stainless Steel302°FHorizontal1AStainless Steel£380.47
MMS5010Stainless Steel1.19"1.13"Stainless Steel392°FHorizontal0.28AStainless Steel£99.10
NM5010Stainless Steel1.19"1.13"Stainless Steel392°FHorizontal0.28AStainless Steel£69.31
MADISON -

Selectable Liquid Level Switch

StyleModelFloat MaterialFloat LengthFloat Dia.Body MaterialOperating Temp.MountingMax. CurrentStem MaterialPrice (inc. VAT)
AM8790-14/4184Polypropylene1 3/4"1"Polypropylene221°FHorizontal0.28APolypropylene£33.10
BMS8010Polypropylene1"1"Stainless Steel221°FHorizontal0.28AStainless Steel£72.64
CM3326-SMPolypropylene0.63"0.58"Polypropylene221°FHorizontal0.12APolypropylene£27.36
DM4065Stainless Steel3"1 1/2"Stainless Steel257°FHorizontal-Stainless Steel£723.94
EM3727Stainless Steel3/4"0.65"Stainless Steel392°FHorizontal0.28AStainless Steel£156.85
FM5600Stainless Steel2"2.13"Stainless Steel392°FVertical Open Tank0.5AStainless Steel£90.37
PROSENSE -

Float Liquid Level Switch, Vertical Top Mount, 32 Inch Length, 0.9 Inch Dia. Float

ModelItemPrice (inc. VAT)
FLS-VD-500CV8BEJ£294.87
PROSENSE -

Vibration Fork Liquid Level Switch, Any Orientation Mount, 1.89 Inch Insertion Length

ModelItemPrice (inc. VAT)
VFL50-100S-3DCV8CFN£302.29
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Frequently Asked Questions

What is the difference between a normally open (NO) and normally closed (NC) liquid level switch?

A normally open (NO) liquid level switch stays in the open state when the liquid level is below the set threshold and closes the circuit when the liquid level rises to the desired level. A normally closed (NC) switch operates oppositely, being in a closed state when the liquid level is below the threshold and opening the circuit when the liquid level reaches the set level.

Why do some people use multiple liquid level switches in the same tank?

Utilising multiple liquid level switches in the same tank provides redundancy and more precise level control. They can be wired in parallel or series, depending on the desired functionality.

How do I troubleshoot a liquid level switch that is not functioning properly?

Troubleshooting measures include checking electrical connections, verifying power supply, inspecting for damage or debris affecting switch operation and ensuring proper switch calibration.

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