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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 Miniature Submersible Suspendable Switch with Slosh Shield $120.98
M4010M4010 Miniature Brass / Buna-N Side-Mounted Switch $46.30
M4168-1M4168-1 Brass High Level 55-Gallon Drum Indicator $110.27
M4168-1-FMM4168-1-FM Brass Drum Level Indicator with Fix Mount Alarm $335.53
M4168-2M4168-2 Low Level Brass Drum Level Indicator $127.67
M4168-3M4168-3 High/Low Drum Level Indicator $156.72
M4300M4300 Brass Full-Size Float Level Switch $31.97
M4300-SPDTM4300-SPDT Brass Full-Size Switch $53.39
M4301M4301 Brass Full-Size Switch $37.87
M4302-7807-1M4302-7807-1 Adjustable Switch Height Feature $149.11
M4302-7807-2M4302-7807-2 Adjustable Switch Height Feature $162.27
M4302-7807-3M4302-7807-3 Adjustable Switch Height Feature $168.31
M4302-7807-4M4302-7807-4 Adjustable Switch Height Feature $178.45
M4302-7807-5M4302-7807-5 Adjustable Switch Height Feature $185.87
M4302-7807-6M4302-7807-6 Adjustable Switch Height Feature $193.52
M4302-xxxxxM4302-xxxxx Brass Multi-Point Switch

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M4500M4500 Brass Miniature Float Level Switch $28.74
M4502-xxxxxM4502-xxxxx Brass Multi-Point Float Level Switch

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M5400M5400 Brass Full-Size Switch

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M5400-SPDTM5400-SPDT Brass Full Size Switch

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M5401M5401 Brass Full-Size Switch

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ML4444ML4444 Brass Multi-Point Switch Kit $222.48
ML4444-LVL3ML4444-LVL3 3rd Level Adder Option for ML4444 Multi-Point Switch Kit $71.23
ML4444-LVL4ML4444-LVL4 4th Level Adder Option for ML4444 Multi-Point Switch Kit $77.41
ML4444-LVLS3&4ML4444-LVLS3&4 3rd & 4th Level Adder Option for ML4444 Multi-Point Switch Kit $137.23
MS4010MS4010 Brass Side-Mounted Switch $74.28
MS4500MS4500 Brass Miniature Switch $61.66
TL4569-10358TL4569-10358 17.5" Visual Level Indicator - Brass Stem / Buna-N Float $198.52
TL4569-10359TL4569-10359 22" Visual Level Indicator - Brass Stem / Buna-N Float $207.73
TL4569-10360TL4569-10360 26.5" Visual Level Indicator - Brass Stem / Buna-N Float $216.93
TL4569-10361TL4569-10361 33" Visual Level Indicator - Brass Stem / Buna-N Float $227.96