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

TELEMECANIQUE SENSORS -

9036D Float Switches

StyleModelBody MaterialMax. VoltageSwitch FunctionAmpsHeightConduit SizeFloat MaterialFloat LengthPrice
A9036DR31Aluminum575VClose On Rise600A-2 3/4"Stainless Steel7"€589.44
B9036DW31Aluminum575VClose On Rise10A4.27"2 3/4"Stainless Steel7"€661.36
A9036DR31CAluminum600VClose On Rise600A5 1/4"2 3/4"Stainless Steel7"€544.25
C9036DG2Polypropylene575VClose On Rise10A4.27"3 1/2"Stainless Steel7"€106.73
A9036DG2CPolypropylene575V-600A4.27"3 1/2"Stainless Steel7"€121.91
A9036DG2RPolypropylene575VOpen On Rise600A4.27"3 1/2"Stainless Steel7"€116.02
A9036DG2CRPolypropylene600VOpen On Rise600A4 1/2"-Stainless Steel7"€135.77
TELEMECANIQUE SENSORS -

Close On Rise Liquid Level Switch

StyleModelFloat Dia.Body MaterialMountingMax. VoltageHeightConduit SizeFloat PositionFloat TravelPrice
A9038CW332 1/2"AluminumSide600V5.94"2 3/4"Right6 1/2"-
RFQ
B9036DG2S127"SteelVertical Open Tank600V4 1/2"1/2"Below1 1/4"€161.97
MADISON -

Close On Rise Ultra Low Level Liquid Switch

StyleModelFloat MaterialFloat LengthFloat Dia.Body MaterialMax. VoltageStem MaterialFloat Specific GravitySwitch FunctionPrice
AM4400-ULL-NOBuna N1 4/25"1"Brass240VStainless Steel0.44Close On Rise€83.98
BM7000-ULL-NOBuna N1 4/25"1"PBT240VPBT0.44Close On Rise€100.91
CM4500-ULL-NOBuna N1"1"Brass240VBrass0.44Close On Rise€87.23
DM9000-ULL-NOKynar1 4/25"1"Kynar240VKynar0.69Close On Rise€87.35
EM4400-PBT-ULL-NOPBT1 4/25"1"Brass240VStainless Steel0.55Close On Rise€66.59
BM7000-PBT-ULL-NOPBT1 4/25"1"PBT240VPBT0.55Close On Rise€66.23
FM8000-ULL-NOPolypropylene1 4/25"1"Polypropylene240VPolypropylene0.42Close On Rise€68.17
GM8020-ULL-NOPolypropylene1"1"Stainless Steel240VStainless Steel0.42Close On Rise€74.90
MADISON -

Selectable Drum Liquid Level Switch

StyleModelFloat MaterialFloat LengthBody MaterialOperating Temp.Max. VoltageStem MaterialFloat Specific GravitySwitch FunctionPrice
AM4168-3Buna N1 1/4"Brass221°F240VBrass0.5Select€223.58
BM4169-3Stainless Steel1.59"Stainless Steel302°F240VStainless Steel0.73Select€316.70
MADISON -

Open On Rise Drum Liquid Level Switch

StyleModelFloat MaterialFloat LengthBody MaterialOperating Temp.Max. VoltageStem MaterialFloat Specific GravitySwitch FunctionPrice
AM4168-2Buna N1 1/4"Brass221°F240VBrass0.5Open On Rise€193.05
BM4169-2Stainless Steel1.59"Stainless Steel302°F240VStainless Steel0.73Open On Rise€235.58
MADISON -

Open On Rise Ultra Low Level Liquid Switch

StyleModelFloat MaterialFloat LengthFloat Dia.Body MaterialMax. VoltageStem MaterialFloat Specific GravitySwitch FunctionPrice
AM4400-ULL-NCBuna N1 4/25"1"Brass240VStainless Steel0.44Open On Rise€99.43
BM9000-ULL-NCKynar1 4/25"1"Kynar240VKynar0.69Open On Rise€70.70
CM8000-ULL-NCPolypropylene1 4/25"1"Polypropylene240VPolypropylene0.42Open On Rise€70.70
DM8020-ULL-NCPolypropylene1"1"Stainless Steel240VStainless Steel0.42Open On Rise€74.68
MADISON -

Close On Rise Drum Liquid Level Switch

StyleModelFloat MaterialFloat LengthBody MaterialOperating Temp.Max. VoltageStem MaterialFloat Specific GravitySwitch FunctionPrice
AM4168-1Buna N1 1/4"Brass221°F240VBrass0.5Close On Rise€162.30
BM4169-1Stainless Steel1.59"Stainless Steel302°F240VStainless Steel0.73Close On Rise€202.52
MADISON -

Close On Rise Liquid Level Switch

StyleModelFloat MaterialFloat LengthFloat Dia.Body MaterialOperating Temp.MountingMax. VoltageStem MaterialPrice
AM3326-NPT-NOPolypropylene0.63"0.58"Polypropylene221°FVertical Open Tank240VPolypropylene€57.01
BM3326-NOPolypropylene0.63"0.58"Polypropylene221°FVertical Open Tank240VPolypropylene€41.38
CM8000-NOPolypropylene1"1"Polypropylene221°FVertical Open Tank240VPolypropylene€24.05
DM3827-2NOStainless Steel1"1.54"Stainless Steel392°FSide240VStainless Steel€156.51
DM3827-3NOStainless Steel1"1.54"Stainless Steel392°FSide240VStainless Steel€163.54
MADISON -

Stainless Steel Single-Point Liquid Level Switches

StyleModelContact FormFloat MaterialFloat LengthFloat Dia.Body MaterialOperating Temp.MountingMax. VoltagePrice
AM4190SPDTStainless Steel4"1"Stainless Steel302°FSide240V€494.99
BM4190-HPSPDTStainless Steel2 1/25"2 1/25"Stainless Steel302°FSide240V€448.31
CM4190-BUSPDTBuna N3"23/25"Stainless Steel221°FSide240V€453.45
DMS5010SPSTStainless Steel1.19"1.13"Stainless Steel392°FSide240V€164.03
EMS5917SPSTStainless Steel2"2.13"Stainless Steel482°FVertical Open Tank240V AC€141.41
FMS9000SPSTKynar1"1"Kynar221°FVertical Open Tank240V€52.41
GMSB5600SPSTStainless Steel2.5"2.13"Stainless Steel221°FVertical Open Tank240V€257.53
HM5010SPSTStainless Steel1.18"1"Stainless Steel392°FSide240V€103.94
IM5600-PRSPSTStainless Steel2.1"2"Stainless Steel392°FVertical Open Tank240V€165.07
JM5920SPSTStainless Steel3/4"0.13"Stainless Steel392°FSide240V€249.47
KMS7000SPSTBuna N1"1"PBT221°FVertical Open Tank240V€38.24
LMS8000SPSTPolypropylene1"1"Polypropylene221°FVertical Open Tank240V€39.27
MMS8800SPSTPolypropylene2.68"1 1/2"Polypropylene221°FVertical Open Tank240V€89.10
NM5000SPSTStainless Steel1.19"1.13"Stainless Steel392°FVertical Open Tank240V€105.35
MADISON -

Selectable Multi-level Liquid Level Switch

StyleModelFloat MaterialFloat LengthFloat Dia.Body MaterialOperating Temp.Max. VoltageStem MaterialGaugePrice
AML8888Buna N1.86"1 1/2"Polypropylene221°F240VPolypropylene23 ga.€528.53
BML4444Buna N2"1 1/4"Polypropylene221°F240VBrass22 ga.€457.93
CML5555Stainless Steel2.1"2.13"Stainless Steel392°F240VStainless Steel22 ga.€853.74
TELEMECANIQUE SENSORS -

9038A Mechanical Alternators

StyleModelBody MaterialMax. VoltageHeightSwitch FunctionFloat MaterialFloat Dia.Operating Temp.MountingPrice
A9038AW1Aluminum600V4 1/2"Close On RiseStainless Steel7"-22°F to +220°FVertical Open Tank€1,177.86
A9038AR1Aluminum600V6.86"Close On RiseStainless Steel7"-22°F to +220°FVertical Open Tank€1,151.58
A9038AW1N5Aluminum600V6.86"Close On RiseStainless Steel7"-22°F to +220°FVertical Open Tank€1,396.05
B9038AG1N4Steel600V4 1/2"Close On RiseStainless Steel7"-22°F to +220°FVertical Open Tank€465.40
B9038AG1Steel600V4 1/2"Close On RiseStainless Steel7"-22°F to +220°FVertical Open Tank€369.58
B9038AG1CSteel600V4 1/2"Close On RiseStainless Steel7"-22°F to +220°FVertical Open Tank€415.01
B9038AG1N5Steel600V4 1/2"Close On RiseStainless Steel7"-22°F to +220°FVertical Open Tank€598.23
BARKSDALE -

Liquid Level Switches

StyleModelSwitch FunctionFloat MaterialBody MaterialMax. VoltageContact FormFloat LengthFloat Dia.Stem MaterialPrice
A0112-988Close On RiseNBRBrass24V AC/DC1NC0.98"0.71"Brass-
RFQ
A0112-1110Close On RiseNBRBrass24V AC/DC1NC0.98"0.71"Brass-
RFQ
B0111-588SelectableBuna NBrass150V ACSPST1 3/4"1.18"Brass-
RFQ
C0111-509SelectablePolyethyleneStainless Steel230V AC/DC1NO/1NC--Stainless Steel-
RFQ
C0111-510SelectablePolyethyleneStainless Steel230V---Stainless Steel€338.02
D0111-609SelectableBuna NStainless Steel230V ACSPST1"1"Stainless Steel-
RFQ
MADISON -

Adjustable-Level Liquid Level Switches

StyleModelFloat MaterialFloat LengthFloat Dia.Body MaterialOperating Temp.Max. VoltageStem MaterialStem LengthPrice
AM4302-7807-6Buna N2"1 1/4"Brass221°F240VBrass70 1/2"€230.28
BM5602-7808-1Stainless Steel2.1"2.13"Stainless Steel392°F240VStainless Steel10 1/2"€397.97
CM5602-7808-6Stainless Steel2"2.13"Stainless Steel392°F240V ACStainless Steel70 1/2"€371.68
TELEMECANIQUE SENSORS -

9036G Float Switches

StyleModelSwitch FunctionBody MaterialMax. VoltageConduit SizeHeightFloat MaterialFloat LengthFloat Dia.Price
A9036GG2Close On RiseThermoplastic575V3 1/2"-Stainless Steel7"7"€189.05
A9036GW1Close On RiseAluminum575V2 3/4"-Stainless Steel7"7"€993.37
A9036GG2HClose On RiseThermoplastic600V3 1/2"5 1/2"Stainless Steel7"7"€220.92
A9036GW1HClose On RiseAluminum600V2 3/4"8 1/4"Stainless Steel7"7"€1,174.96
A9036GG2ROpen On RiseThermoplastic575V3 1/2"-Stainless Steel7"7"€195.12
A9036GW1ROpen On RiseAluminum600V2 3/4"8 1/4"Stainless Steel7"7"€1,174.45
TELEMECANIQUE SENSORS -

9037 Float Switches

StyleModelBody MaterialOperating Temp.Max. VoltageSwitch FunctionHeightConduit SizeFloat PositionFloat TravelPrice
A9037HW35Aluminum-22°F to +220°F600VClose On Rise6.22"2 3/4"Right4 1/2"€750.06
A9037HW34Aluminum-22°F to +220°F600VClose On Rise4.78"2 3/4"Left6 1/4"€808.98
A9037HW30Aluminum-22°F to +220°F600VClose On Rise6.22"2 3/4"Left4 1/2"€800.07
B9037HG32LZ20Steel250°F600VClose On Rise5.98"3 1/2"Left4 1/2"€245.28
C9037HG38Steel-22°F to +220°F600VClose On Rise5.98"3 1/2"Left4 1/2"€242.43
C9037HG36Z20Steel250°F600VClose On Rise5.98"3 1/2"Left4 1/2"€281.25
B9037HG36LZ20Steel250°F600VClose On Rise5.98"3 1/2"Left4 1/2"€235.96
D9037HG36F3LZ20Steel250°F600VClose On Rise5.98"3 1/2"Left4 1/2"€185.43
C9037HG34RSteel-22°F to +220°F600VOpen On Rise4 11/25"3 1/2"Left6 1/4"€264.79
C9037HG33Z20Steel250°F600VClose On Rise4 11/25"3 1/2"Right6 1/4"€247.08
C9037HG33F3Z20Steel250°F600VClose On Rise4 11/25"3 1/2"Right6 1/4"€261.92
B9037HG32Z20Steel250°F600VClose On Rise5.98"3 1/2"Left4 1/2"€280.57
C9037HG30Steel-22°F to +220°F600VClose On Rise5.98"3 1/2"Left6 1/4"€305.65
C9037HG31Steel-22°F to +220°F600VClose On Rise5.98"3 1/2"Right9 1/2"€277.06
C9037HG30Z20Steel250°F600VClose On Rise5.98"3 1/2"Left4 1/2"€308.92
C9037HG30RSteel-22°F to +220°F600VOpen On Rise5.98"3 1/2"Left4 1/2"€277.06
C9037HW33Steel-22°F to +220°F600VClose On Rise4 11/25"2 3/4"Right3"€753.48
C9037HG37Steel-22°F to +220°F600VClose On Rise5.98"3 1/2"Left3"€277.06
C9037HG36Steel-22°F to +220°F600VClose On Rise5.98"3 1/2"Right3"€277.06
C9037HG35Steel-22°F to +220°F600VClose On Rise5.98"3 1/2"Right3"€277.06
C9037HG34Steel-22°F to +220°F600V-4 11/25"3 1/2"Left3"€242.43
C9037HG33RSteel-22°F to +220°F600VOpen On Rise5.98"3 1/2"Right3"€284.50
C9037HG33Steel-22°F to +220°F600VClose On Rise4 11/25"3 1/2"Right3"€270.26
C9037HG32LSteel-22°F to +220°F600VClose On Rise5.98"3 1/2"Left9 1/2"€202.66
C9037HG32Steel-22°F to +220°F600VClose On Rise5.98"3 1/2"Left9 1/2"€301.78
TELEMECANIQUE SENSORS -

9037E Float Switches

StyleModelBody MaterialMax. VoltageConduit SizeSwitch FunctionFloat MaterialFloat LengthFloat Dia.Operating Temp.Price
A9037EW9Aluminum600V2 3/4"Close On RiseStainless Steel4 1/2"3.63"-22°F to +220°F€1,338.04
B9037EG9Brass575V3 1/2"Close On RiseStainless Steel4 1/2"3.63"-22°F to +220°F€369.63
B9037EG8Steel575V3 1/2"Close On RiseStainless Steel4 1/2"3.63"-22°F to +220°F€607.52
B9037EG10Steel600V3 1/2"Close On RiseStainless Steel4 1/2"3.63"-22°F to +220°F€576.07
TELEMECANIQUE SENSORS -

9038 Alternator Liquid Level Switches

StyleModelFloat LengthFloat Dia.Body MaterialOperating Temp.MountingMax. VoltageFloat TravelFloat PositionPrice
A9038DW84 1/2"3.63"Aluminum-22°F to +220°FVertical600V8 3/4"Below€1,666.78
B9038DG74 1/2"3.63"Steel-22°F to +220°FVertical Open Tank600V8 3/4"Below€907.78
B9038DG84 1/2"3.63"Steel-22°F to +220°FVertical Open Tank600V8 3/4"Below€920.07
B9038DG94 1/2"3.63"Steel-22°F to +200°FVertical Open Tank575V8 3/4"-€1,000.56
C9038CG31F37"2 1/2"Steel-22°F to +220°FHorizontal600V6 1/2"Right€697.03
D9038CG36Z207"2 1/2"Steel250°FHorizontal600V6 1/2"Left€746.09
C9038CG33F37"2 1/2"Steel-22°F to +220°FHorizontal600V6 1/2"Right€709.00
E9038CG32Z207"2 1/2"Steel250°FHorizontal600V6 1/2"Left€758.29
E9038CG32N57"2 1/2"Steel-22°F to +220°FHorizontal600V6 1/2"Left€954.51
E9038CG317"2 1/2"Steel-22°F to +220°FHorizontal600V6 1/2"Right€674.39
F9038AG1S67"7"Steel-22°F to +220°FVertical Open Tank600V1 1/4"Below€450.78
E9038CG347"2 1/2"Steel-22°F to +220°FHorizontal600V6 1/2"Left€783.52
E9038CG327"2 1/2"Steel-22°F to +220°FHorizontal600V6 1/2"Left€738.85
G9038CW327"2 1/2"Steel-22°F to +200°FVertical Open Tank575V6 1/2"-€1,594.57
D9038CG367"2 1/2"Steel-22°F to +220°FHorizontal600V4 1/2"Left€777.54
E9038CG337"2 1/2"Steel-22°F to +220°FHorizontal600V3 3/4"Right€759.13
E9038CG33Z207"2 1/2"Steel250°FHorizontal600V6 1/2"Right€744.67
TELEMECANIQUE SENSORS -

9038C Mechanical Alternators

StyleModelOperating Temp.Max. VoltageHeightFloat TravelSwitch FunctionFloat MaterialFloat LengthFloat Dia.Price
A9038CG36N4-22°F to +220°F600V5.94"6 1/2"Close On RiseStainless Steel7"2 1/2"€943.50
B9038CG36LZ20-22°F to +220°F600V7 1/4"4 1/2"Close On RiseStainless Steel7"2 1/2"€726.66
B9038CG36N4LZ20250°F600V5.94"6 1/2"Close On RiseStainless Steel7"2 1/2"€809.42
MADISON -

Selectable Liquid Level Switch

StyleModelFloat MaterialFloat LengthFloat Dia.Body MaterialOperating Temp.MountingMax. VoltageStem MaterialPrice
AMS8010Polypropylene1"1"Stainless Steel221°FSide240V ACStainless Steel€88.30
BM3326-SMPolypropylene0.63"0.58"Polypropylene221°FSide120V ACPolypropylene€26.74
CM8790-14/4184Polypropylene1 3/4"1"Polypropylene221°FSide240VPolypropylene€51.41
DM4065Stainless Steel3"1 1/2"Stainless Steel257°FSide240V ACStainless Steel€675.05
EM5600Stainless Steel2.1"2.13"Stainless Steel392°FVertical Open Tank240VStainless Steel€149.85
FM3727Stainless Steel3/4"0.65"Stainless Steel392°FSide240V ACStainless Steel€191.01
MADISON -

Open On Rise Liquid Level Switch

StyleModelFloat MaterialFloat LengthFloat Dia.Operating Temp.MountingMax. VoltageBody MaterialStem MaterialPrice
AM3782Buna N1"1"221°FVertical Open Tank240VBrassBrass€199.36
BM4035Polypropylene11/25"0.78"221°FVertical Open Tank240V-Stainless Steel€67.25
CM3326Polypropylene0.63"0.58"221°FVertical Open Tank240VPolypropylenePolypropylene€48.40
DM8000-CPolypropylene3/4"1"140°FVertical Open Tank240VPolypropylenePolypropylene€42.50
EM8800-PRPolypropylene2"1 1/2"221°FVertical Open Tank240VPolypropylenePolypropylene€141.41
FM3326-NPTPolypropylene0.63"0.58"221°FVertical Open Tank120V ACPolypropylenePolypropylene€56.89
GM3827-3Stainless Steel1"1.54"392°FSide240V ACStainless SteelStainless Steel€179.82
HM3827-2Stainless Steel1"1.54"392°FSide240VStainless SteelStainless Steel€166.46
SQUARE D -

Liquid Level Switches

StyleModelMPNPrice
A9037HG34Z209037HG34Z20-
RFQ
A9037HG35R9037HG35R€312.71
A9037HG38Z209037HG38Z20€363.62
B9037HR329037HR32-
RFQ
C9037HW329037HW32€878.17
D9038CW369038CW36€1,694.47
E9049A6A9049A6A€307.48
F9049EF29049EF2€206.26
G9049ER29049ER2€29.69
G9049ER79049ER7€40.16
H9998PC3389998PC338€38.17
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Working Mechanism

  • Mount the level switch at the desired level in the container or tank.
  • Make sure the float can move up and down as the liquid level changes.
  • As the liquid level rises, the float will also rise, activating the switch mechanism.
  • The switch can be connected to a control system or pump to perform the desired action, such as stopping or starting a process.

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.