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...Read more

MADISON -

Selectable Liquid Level Switch

StyleModelFloat MaterialFloat LengthFloat Dia.Body MaterialOperating Temp.MountingMax. CurrentStem MaterialPrice (inc. VAT)
AMS8010Polypropylene1"1"Stainless Steel221°FHorizontal0.28AStainless Steel£83.81
BM3326-SMPolypropylene0.63"0.58"Polypropylene221°FHorizontal0.12APolypropylene£27.36
CM8790-14/4184Polypropylene1 3/4"1"Polypropylene221°FHorizontal0.28APolypropylene£38.20
DM5600Stainless Steel2"2.13"Stainless Steel392°FVertical Open Tank0.5AStainless Steel£97.99
EM4065Stainless Steel3"1 1/2"Stainless Steel257°FHorizontal-Stainless Steel£835.31
FM3727Stainless Steel3/4"0.65"Stainless Steel392°FHorizontal0.28AStainless Steel£180.98
SQUARE D -

Close On Rise Liquid 2-Level Switch

StyleModelFloat Dia.Operating Temp.MountingHeightFloat PositionFloat TravelSwitch FunctionContact FormPrice (inc. VAT)
A9038CG36N4LZ202 1/2"250°FHorizontal5.94"Left6 1/2"Close On RiseDPST£764.73
B9038CG36N42 1/2"-22°F to +220°FHorizontal5.94"Left6 1/2"Close On RiseDPST£819.43
C9038AG1N47"-22°F to +220°FVertical Open Tank4 1/2"Below1 1/4"Close On RiseDPST£324.59
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£291.63
SQUARE D -

Close On Rise Alternator Liquid Level Switch

StyleModelFloat LengthFloat Dia.Body MaterialOperating Temp.MountingMax. VoltageHeightFloat PositionPrice (inc. VAT)
A9038DG94 1/2"3.63"Steel-22°F to +200°FVertical Open Tank575V4.87"Below£818.05
A9038DG84 1/2"3.63"Steel-22°F to +220°FVertical Open Tank600V9.82"Below£779.55
B9038DW84 1/2"3.63"Aluminum-22°F to +220°FVertical600V6.31"Below£1,904.88
C9038DR84 1/2"3.63"Aluminum-22°F to +220°FVertical600V6.31"Below£2,362.43
A9038DG74 1/2"3.63"Steel-22°F to +220°FVertical Open Tank600V9.82"Below£886.01
D9038AR17"7"Aluminum-22°F to +220°FVertical Open Tank600V6.86"Below£949.10
E9038CG33Z207"2 1/2"Steel250°FHorizontal600V5.94"Right£651.70
F9038CW327"2 1/2"Steel-22°F to +200°FVertical Open Tank575V5.94"Left£1,426.30
E9038CG32N57"2 1/2"Steel-22°F to +220°FHorizontal600V5.94"Left£838.38
D9038AW1N57"7"Aluminum-22°F to +220°FVertical Open Tank600V6.86"Below£1,157.44
E9038CG34Z207"2 1/2"Steel250°FHorizontal600V5.94"Left£620.47
E9038CG317"2 1/2"Steel-22°F to +220°FHorizontal600V7.22"Right£576.65
G9038CW317"2 1/2"Aluminum-22°F to +220°FHorizontal600V5.94"Right£1,541.87
H9038AG1S67"7"Steel-22°F to +220°FVertical Open Tank600V4 1/2"Below£338.76
I9038CG33F37"2 1/2"Steel-22°F to +220°FHorizontal600V5.94"Right£681.34
D9038AW17"7"Aluminum-22°F to +220°FVertical Open Tank600V4 1/2"Below£888.92
E9038CG337"2 1/2"Steel-22°F to +220°FHorizontal600V7.22"Right£661.64
J9038CG36Z207"2 1/2"Steel250°FHorizontal600V5.94"Left£686.88
I9038CG31F37"2 1/2"Steel-22°F to +220°FHorizontal600V5.94"Right£639.97
H9038AG1C7"7"Steel-22°F to +220°FVertical Open Tank600V4 1/2"Below£381.66
E9038CG327"2 1/2"Steel-22°F to +220°FHorizontal600V7.22"Left£712.31
H9038AG17"7"Steel-22°F to +220°FVertical Open Tank600V4 1/2"Below£271.91
H9038AG1N57"7"Steel-22°F to +220°FVertical Open Tank600V4 1/2"Below£453.25
E9038CG347"2 1/2"Steel-22°F to +220°FHorizontal600V5.94"Left£695.04
J9038CG367"2 1/2"Steel-22°F to +220°FHorizontal600V7.22"Left£749.62
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£166.12
BM8000-CPolypropylene3/4"7/8"PVC, Polypropylene140°FVertical Open Tank0.28APVC£29.33
CM3326-NPTPolypropylene0.63"0.58"Polypropylene221°FVertical Open Tank0.12APolypropylene£50.03
DM8800-PRPolypropylene2"1 1/2"Polypropylene221°FVertical Open Tank1APolypropylene£125.64
EM3326Polypropylene0.63"0.58"Polypropylene221°FVertical Open Tank0.12APolypropylene£35.52
FM4035Polypropylene11/25"0.78"Stainless Steel221°FVertical Open Tank0.12AStainless Steel£66.44
GM3827-2Stainless Steel1"1.54"Stainless Steel392°FHorizontal0.28AStainless Steel£135.24
HM3827-3Stainless Steel1"1.54"Stainless Steel392°FHorizontal0.28AStainless Steel£182.03
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£215.57
BM5910SPDTStainless Steel2"0.63"Stainless Steel392°FHorizontal0.28A£217.29
CM7725SPSTPBT2.11"0.65"PBT266°FHorizontal0.28A£29.23
DM8750SPSTPolypropylene1 3/4"1"Polypropylene221°FHorizontal0.28A£22.17
EMSB8800SPSTPolypropylene2"1 1/2"Polypropylene221°FVertical Open Tank0.5A£135.49
FM9000SPSTKynar1"1"Kynar221°FVertical Open Tank0.28A£34.14
GM7740SPSTPBT2.11"0.65"PBT266°FHorizontal0.28A£26.51
HM5970SPSTStainless Steel1"1"Stainless Steel392°FHorizontal0.28A£137.87
IM4010SPSTBuna N1"1"Brass221°FHorizontal0.28A£63.87
JM8700SPSTPolypropylene2.11"0.65"Polypropylene221°FHorizontal0.28A£19.40
KM4300SPSTBuna N2"1 1/4"Brass221°FVertical Open Tank0.5A£72.27
LM8000BSPSTPolypropylene1"1"Polypropylene221°FVertical Open Tank0.28A£46.63
MM7000SPSTBuna N1"1"PBT221°FVertical Open Tank0.28A£22.03
NM7700SPSTPBT2.11"0.65"PBT149°FHorizontal0.28A£22.02
OM7750SPSTPBT2.11"0.65"PBT266°FHorizontal0.28A£31.27
PM8700-CSPSTPolypropylene2.06"1/2"Polypropylene221°FHorizontal0.28A£21.29
QM9700SPSTKynar2.11"0.65"Kynar221°FHorizontal0.28A£38.63
RM8710SPSTPolypropylene1 3/4"1"Polypropylene221°FHorizontal0.28A£47.93
SM7790SPSTPBT2.11"0.65"PBT266°FHorizontal0.28A£31.75
TM5917SPSTStainless Steel2"2.13"Stainless Steel482°FVertical Open Tank0.5A£115.08
UM8000SPSTPolypropylene1"1"Polypropylene221°FVertical Open Tank0.28A£17.70
VM8800SPSTPolypropylene2"1 1/2"Polypropylene221°FVertical Open Tank0.5A£86.86
WM9705SPSTKynar2.11"0.65"Kynar221°FHorizontal0.28A£89.25
XM8705SPSTPolypropylene1 3/4"1"Polypropylene221°FHorizontal0.28A£42.11
YM8790SPSTPolypropylene1 3/4"1"Polypropylene221°FHorizontal0.28A£19.64
MADISON -

Stainless Steel Single-Point Liquid Level Switches

StyleModelFloat MaterialFloat LengthFloat Dia.Body MaterialOperating Temp.MountingMax. CurrentStem MaterialPrice (inc. VAT)
AMS7000Buna N1"1"PBT221°FVertical Open Tank0.28APBT£30.03
BM4190-BUBuna N3"23/25"Stainless Steel221°FHorizontal1ABuna N£397.21
CMS9000Kynar1"1"Kynar221°FVertical Open Tank0.28AKynar£45.53
DMS8800Polypropylene2"1 1/2"Polypropylene221°FVertical Open Tank0.5APolypropylene£81.15
EMS8000Polypropylene1"1"Polypropylene221°FVertical Open Tank0.28APolypropylene£29.17
FMSB5600Stainless Steel2"2.13"Stainless Steel221°FVertical Open Tank0.5AStainless Steel£267.34
GM5600-PRStainless Steel2"2"Stainless Steel392°FVertical Open Tank1AStainless Steel£141.35
HM5920Stainless Steel3/4"0.13"Stainless Steel392°FHorizontal0.28AStainless Steel£182.21
IMS5917Stainless Steel2"2.13"Stainless Steel482°FVertical Open Tank0.5AStainless Steel£112.95
JM4190Stainless Steel4"1"Stainless Steel302°FHorizontal1AStainless Steel£439.01
KM4190-HPStainless Steel2 1/25"2 1/25"Stainless Steel302°FHorizontal1AStainless Steel£368.17
LM5010Stainless Steel1.19"1.13"Stainless Steel392°FHorizontal0.28AStainless Steel£79.98
MMS5010Stainless Steel1.19"1.13"Stainless Steel392°FHorizontal0.28AStainless Steel£114.34
NM5000Stainless Steel1.19"1.13"Stainless Steel392°FVertical Open Tank0.28AStainless Steel£70.20
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"£207.61
RFQ
BM5602-7808-6Stainless Steel2.13"Stainless Steel392°FVertical Open Tank72"Stainless Steel70 1/2"£321.64
RFQ
CM5602-7808-1Stainless Steel2.13"Stainless Steel392°FVertical Open Tank12"Stainless Steel10 1/2"£434.59
SQUARE D -

Liquid Level Switches

StyleModelMPNPrice (inc. VAT)
A9037HG34Z209037HG34Z20£265.99
A9037HG35R9037HG35R£253.25
A9037HG38Z209037HG38Z20£296.97
B9037HR329037HR32£697.59
C9037HW329037HW32£761.97
D9038CW369038CW36£1,579.38
E9049A6A9049A6A£240.94
F9049EF29049EF2£167.04
G9049ER29049ER2£27.70
G9049ER79049ER7£31.76
H9998PC3389998PC338£29.85
SQUARE D -

Open On Rise Liquid Level Switch

StyleModelFloat LengthFloat Dia.MountingMax. VoltageHeightFloat PositionFloat TravelConduit SizePrice (inc. VAT)
A9036GG2R7"7"Vertical Open Tank575V5 14/25"Below1 1/4"3 1/2"£183.21
A9036DG2R7"7"Vertical Open Tank575V4.27"Below1 1/4"3 1/2"£94.45
A9036DG2CR7"7"Vertical Open Tank600V4 1/2"Below1 1/4"-£108.73
A9036DW31R7"7"Vertical Open Tank575V4.27"Below1 1/4"2 3/4"£526.42
A9036GW1R7"7"Vertical Open Tank600V8 1/4"Below1 1/4"2 3/4"£1,096.51
RFQ
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
B9037HG34R7.13"2.58"Horizontal600V4 11/25"Left6 1/4"3 1/2"£266.44
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£458.10
BML8888Polypropylene1 1/2"Polypropylene221°FVertical Open TankPolypropylene23 ga.0.75£365.77
CML5555Stainless Steel2.13"Stainless Steel392°FVertical Open TankStainless Steel22 ga.0.55£719.27
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£261.70
BM4169-3Stainless Steel1.59"Stainless Steel302°FVertical Open TankStainless Steel0.73Select£395.45
SQUARE D -

Close On Rise Liquid Level Switch

StyleModelFloat LengthFloat Dia.Operating Temp.MountingMax. VoltageBody MaterialHeightFloat PositionPrice (inc. VAT)
A9037EW94 1/2"3.63"-22°F to +220°FVertical Open Tank600VAluminum7 3/5"Below£970.90
B9037EG84 1/2"3.63"-22°F to +220°FVertical Open Tank575VSteel5 14/25"Below£382.47
B9037EG104 1/2"3.63"-22°F to +220°FVertical Open Tank600VSteel7 3/5"Below£420.36
B9037EG94 1/2"3.63"-22°F to +220°FVertical Open Tank575V-5 14/25"Below£374.77
C9036DW317"7"-22°F to +220°FVertical Open Tank575VSteel4.27"Below£543.89
D9036DR317"7"-22°F to +220°FVertical Open Tank575VSteel4.27"Below£521.34
D9036GG27"7"-22°F to +220°FVertical Open Tank575VSteel5 14/25"Below£136.62
D9036DG2C7"7"-22°F to +220°FVertical Open Tank575VSteel4.27"Below£100.38
D9036GW1H7"7"-22°F to +220°FVertical Open Tank600VSteel8 1/4"Below£960.70
D9036GR17"7"-22°F to +220°FVertical Open Tank600VSteel8 1/4"Below£939.57
RFQ
D9036DR31C7"7"-22°F to +220°FVertical Open Tank600VSteel5 1/4"Below£516.75
E9036DG27"7"-22°F to +220°FVertical Open Tank575VSteel4.27"Below£88.43
F9038CW337"2 1/2"-22°F to +220°FSide600VAluminum5.94"Right£1,663.54
G9038CG36LZ207"2 1/2"-22°F to +220°FHorizontal600VSteel7 1/4"Left£619.41
D9036DW31C7"7"-22°F to +220°FVertical Open Tank600VSteel5 1/4"Below£556.69
D9036DG2S127"7"-22°F to +220°FVertical Open Tank600VSteel4 1/2"Below£146.03
H9036FG307"7"-22°F to +220°FVertical Open Tank600VSteel4 1/2"Below£37.71
D9036GG2H7"7"-22°F to +220°FVertical Open Tank600VSteel5 1/2"Below£187.79
D9036GW17"7"-22°F to +220°FVertical Open Tank575VSteel5 14/25"Below£864.40
RFQ
I9037HG357.13"2.58"-22°F to +220°FHorizontal600VSteel5.98"Right£291.43
I9037HG307.13"2.58"-22°F to +220°FHorizontal600VSteel5.98"Left£275.04
I9037HG30Z207.13"2.58"250°FHorizontal600VSteel5.98"Left£320.74
J9037HW347.13"2.58"-22°F to +220°FHorizontal600VAluminum4.78"Left£863.60
K9037HG36LZ207.13"2.58"250°FHorizontal600VSteel5.98"Left£201.09
I9037HG377.13"2.58"-22°F to +220°FHorizontal600VSteel5.98"Left£269.88
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£220.19
BM4169-2Stainless Steel1.59"Stainless Steel302°FVertical Open TankStainless Steel0.73Open On Rise£241.23
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
BM4500-ULL-NOBuna NBrassVertical Open TankBrass0.44Close On RiseSPST1 4/25"£78.28
CM7000-ULL-NOBuna NPBTVertical Open TankPBT0.44Close On RiseSPST1 4/25"£76.28
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
CM7000-PBT-ULL-NOPBTPBTVertical Open TankPBT0.55Close On RiseSPST1 4/25"£59.99
FM8020-ULL-NOPolypropyleneStainless SteelVertical Open TankStainless Steel0.42Close On RiseSPST1 4/25"£67.12
GM8000-ULL-NOPolypropylenePolypropyleneVertical Open TankPolypropylene0.42Close On RiseSPST1 4/25"£57.21
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
CM8020-ULL-NCPolypropyleneStainless SteelVertical Open TankStainless Steel0.42Open On RiseSPST1 4/25"£66.89
DM8000-ULL-NCPolypropylenePolypropyleneVertical Open TankPolypropylene0.42Open On RiseSPST1 4/25"£59.96
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£179.73
BM4169-1Stainless Steel1.59"Stainless Steel302°FVertical Open TankStainless Steel0.73Close On Rise£232.94
MADISON -

Close On Rise Liquid Level Switch

StyleModelFloat MaterialFloat LengthFloat Dia.Body MaterialOperating Temp.MountingMax. CurrentStem MaterialPrice (inc. VAT)
AM3326-NOPolypropylene0.63"0.58"Polypropylene221°FVertical Open Tank0.12APolypropylene£33.42
BM8000-NOPolypropylene1"1"Polypropylene221°FVertical Open Tank0.28APolypropylene£22.64
CM3326-NPT-NOPolypropylene0.63"0.58"Polypropylene221°FVertical Open Tank0.12APolypropylene£48.96
DM3827-3NOStainless Steel1"1.54"Stainless Steel392°FHorizontal0.28AStainless Steel£175.18
DM3827-2NOStainless Steel1"1.54"Stainless Steel392°FHorizontal0.28AStainless Steel£156.66
BARKSDALE -

Liquid Level Switches

StyleModelSwitch FunctionContact FormVa RatingFloat MaterialBody MaterialOperating Temp.MountingMax. VoltagePrice (inc. VAT)
A0112-1110---------
RFQ
B0111-588---------
RFQ
C0111-509---------
RFQ
D0111-609---------
RFQ
A0112-988---------
RFQ
C0111-510SelectableSPST40 VAPolypropyleneStainless Steel70°FVertical Open Tank230V£348.26
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 -

Float Liquid Level Switch, Vertical Top Mount, 0.75 Inch Insertion Length

ModelItemPrice (inc. VAT)
FLS-VS-500CV8BFL£56.10
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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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