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Sensor Materials

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Liquid level switches and sensors measure all kinds of fluids, such as hot oils used in commercial kitchens, caustic chemicals used in processing equipment, liquid detergents and waxes in carwash locations, and black/grey water in sewage treatment plants. Material selection plays an important role in the selection of a liquid level switch/sensor because the material choice is dependent on the chemical compatibility of the liquid being sensed. For example, polypropylene is an excellent material that works well in most liquids, but will melt in high heat. 316 stainless steel is a highly durable material but not recommended for use with chlorine or sulfuric acid.

316 Stainless Steel
Durable and compatible with many types of liquids, 316 stainless steel is frequently used in food processing, especially in high temperature applications, plating processes, medical applications and petrochemical.
Brass
Highly resistant to petroleum based liquids, brass is commonly used in generators, transmissions and hydraulic systems. Other uses include lubricating equipment, waste oil recovery, refining and fuel processing equipment.
Polyproylene
A good choice for general-purpose applications, polyprolyene holds up well in acidic or alkaline liquids. Because it is FDA approved for food contact, it can also used in low temperature applications (up to 221F, 105C) such as food service steamers and proofers.
PBT
Used in applications with temperatures not exceeding 300F (149C), PBT features good dimensional stability and has excellent resistence to a broad range of chemicals. It can be used in conjunction with brass and Buna-N for measurement of oils and fuels.
Buna-N
Provides excellent buoyancy in petroleum based liquids such as diesal fuel and lubricating oils. Widely used in storage tanks of vehicles, generators, transmissions and hydraulic systems. Also suitable for dilute acids and bases, aromatic hydrocarbons and salt water.
Kynar
Extremely non-reactive with many different substances, Kynar is also very dense, very resistant to UV and other types of radiation, and can be used as an insulator. The high purity of the material make it an outstanding choice for food handling, as well as medical, laboratory and sensitive test equipment.

Click to view our chemical compatibility guide »

Model No.sort descending Image Description Add to Cart
M3782M3782 Submersible suspendable float switch, brass and Buna, slosh shield, 240" cable $126.43
M4010M4010 Miniature side mount 90 degree float switch, brass and Buna, 3/8" bulkhead $48.38
M4168-1M4168-1 High level float switch, brass and Buna, 3/4" bung, normally open, for 55 gallon drums $115.23
M4168-1-FMM4168-1-FM High level float switch, brass and Buna, 3/4" bung, normally open, for 55 gallon drums, with fixed mount alarm $350.63
M4168-2M4168-2 Low level float switch, brass and Buna, 3/4" bung, normally closed, for 55 gallon drums $133.41
M4168-3M4168-3 High and low level float switch, brass and Buna, 3/4" bung, for 55 gallon drums, fixed mount alarm $163.77
M4300M4300 Float switch, brass and Buna, 1/4" NPT, 60 watt $33.41
M4300-SPDTM4300-SPDT Float switch, brass and Buna, 1/4" NPT, 25 watt SPDT $56.06
M4301M4301 Float switch, brass and Buna, 1/4" NPT, 100 watt $39.76
M4302-7807-1M4302-7807-1 Adjustable float switch, brass and Buna, 10.5" Max, 2" NPT $155.82
M4302-7807-2M4302-7807-2 Adjustable float switch,brass and Buna, 22.5" max, 2" NPT $169.57
M4302-7807-3M4302-7807-3 Adjustable float switch,brass and Buna, 34.5" max, 2" NPT $175.88
M4302-7807-4M4302-7807-4 Adjustable float switch,brass and Buna, 46.5" max, 2" NPT $186.48
M4302-7807-5M4302-7807-5 Adjustable float switch,brass and Buna, 58.5" max, 2" NPT $194.23
M4302-7807-6M4302-7807-6 Adjustable float switch, brass and Buna, 70.5" max, 2" NPT $202.23
M4302-xxxxxM4302-xxxxx Multi-point float switch,brass and Buna, custom configured

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M4500M4500 Miniature float switch, brass and Buna, 1/8" NPT $30.04
M4502-xxxxxM4502-xxxxx Miniature multi-point float switch, brass and Buna, custom configurable

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M5400M5400 Float switch, stainless steel and Buna, 1/4" NPT, 60 watt

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M5400-SPDTM5400-SPDT Float switch, stainless steel and Buna, 1/4" NPT, 25 watt SPDT

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M5401M5401 Float switch, stainless steel and Buna, 1/4" NPT, 100 watt

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M8401M8401 Brass Full-Size Switch

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ML4444ML4444 Multi-point float switch kit, brass and Buna, 2" NPT, 2 level $232.49
ML4444-LVL3ML4444-LVL3 Multi-point float switch kit, brass and Buna, 3rd level adder, for ML4444 $74.43
ML4444-LVL4ML4444-LVL4 Multi-point float switch kit, brass and Buna, 4th level adder, for ML4444 $80.89
ML4444-LVLS3&4ML4444-LVLS3&4 3rd & 4th Level Adder Option for ML4444 Multi-Point Switch Kit $143.41
MS4010MS4010 Miniature side mount 90 degree float switch, brass and Buna, 3/8" bulkhead, slosh shield $77.62
MS4500MS4500 Miniature float switch, brass and Buna, 1/8" NPT, slosh shield $64.43
MS8040MS8040 Brass Miniature Switch

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TL4569-10358TL4569-10358 Visual level indicator, brass and Buna, 2" NPT, 17.5" total length $207.45
TL4569-10359TL4569-10359 Visual level indicator, brass and Buna, 2" NPT, 22" total length $217.08
TL4569-10360TL4569-10360 Visual level indicator, brass and Buna, 2" NPT, 26.5" total length $226.69
TL4569-10361TL4569-10361 Visual level indicator, brass and Buna, 2" NPT, 33" total length $238.22