MAMCO Precision Switches
- Offer Profile
- MAMCO Precision Switches:
A History Of Innovation
Since 1964, MAMCO has been providing customized molded components and sub-assemblies that have been used in sensors, control systems, and switches for companies in diverse industries. Our history is filled with innovation, something that has kept us a step ahead of our competitors in high pressure switch design and more.
Product Portfolio
Air Compressor Pressure Switches
- In order to gain the performance you require, your air
compressor switches need to be reliable, durable and designed properly. At
MAMCO, we offer our customers with only the best in switches for a wide
variety of applications.
MAMCO was founded in 1964 and has since become a leader in the industry. In addition to air compressor switches, we also produce a variety of other switches and custom molding solutions to meet our client needs. Ever since our inception, we have worked hard to earn a reputation for quality, performance and innovation.
Our air compressor pressure switches offer superior pressure regulation for air compressors. We produce air compressor pressure switches with an unloader valve to sense line pressure and provide a control signal to system valves. Many of our air compressor pressure switches are also available with an auto On/Off button for manual compressor shutoff. 
LF10-1H
- Air Compressor Pressure Switch
The LF10-1H air compressor pressure switch is designed to regulate tank pressure between two preset values (up to 175 PSI) on small, electrically driven air compressors. The pressure switch is available with an unloader valve, which prevents the compressor from starting underload. A standard on this model is a disconnect metal lever used to manually turn off the compressor when not in use. The lever is offered in different shapes to suit your needs. A four port manifold is available which provides means for easy mounting of valves and gauges.
Benefits & Features- Optional four port manifold available
- Corrosion Resistant and Non Metallic Cover
- No Wire Looping
- Visible Contact
- No Drift Pressure Setting
- Captive Cover Screw
- Ample Wiring Room
- 2 Ground Screw
- Easy to Adjust
- Automatic Unloader Valve Available
- Pulsation Dampener Standard
LF10-4H
- Air Compressor Pressure Switch
The LF10-4H pressure switch is designed to regulate tank pressure between two preset values (up to 175 PSI) on small, electrically driven air compressors. The MAMCO LF10-4H air compressor pressure switch is available with an unloader valve, which prevents the compressor from starting underload. A standard on this model is a disconnect metal lever used to manually turn off the compressor when not in use. The lever is offered in different shapes to suit your needs. A four port manifold is available which provides means for easy mounting of valves and gauges.
Benefits & Features- Optional four port manifold available
- Corrosion Resistant and Non Metallic Cover
- No Wire Looping
- Visible Contact
- No Drift Pressure Setting
- Captive Cover Screw
- Ample Wiring Room
- 2 Ground Screw
- Easy to Adjust
- Automatic Unloader Valve Available
- Pulsation Dampener Standard
- Optional four port manifold available
LF10-L1H
- Air Compressor Pressure Switch
The LF10-L1H pressure switch is a pressure actuated electric switch designed to maintain tank pressure between two preset values on an electrically driven air compressor. These air compressor switch models are available with an unloader valve to prevent the compressor from starting underload. This model offers an on- off button, to manually turn off the compressor when not in use. A four port manifold style is available to which provides means for easy mounting of valves and gauges.
Benefits & Features- Corrosion Resistant Cover
- Automatic Unloader Valve Available
- Optional four port manifold available
- Auto On/Off button for manual compressor shutoff available as optional feature
- Pulsation Dampener Standard
LF10-L4H
- 4 Port Air Compressor Pressure Switch
The LF10-L4H 4-Port air compressor pressure switch is a pressure actuated electric switch designed to maintain tank pressure between two preset values on an electrically driven air compressor. These models are available with an unloader valve to prevent the compressor from starting underload. This model offers an on- off button, to manually turn off the compressor when not in use. A four port manifold style is available to which provides means for easy mounting of valves and gauges.
Benefits & Features- Corrosion Resistant Cover
- Automatic Unloader Valve Available
- Optional four port manifold available
- Auto On/Off button for manual compressor shutoff available as optional feature
- Pulsation Dampener Standard
LF17
- Heavy Duty Air Compressor Pressure Switch
The LF17 is a pressure switch designed to regulate tank pressure between two preset values on larger heavy duty commercial air compressors (up to 250 PSI). The sturdy painted steel case and cover offer optimum protection in harsh environments. The LF17 is available with an unloader valve which prevents the compressor from starting underload.
Benefits & Features- Automatic Unloader Valve Available
- Sturdy Stamped Steel Case & Cover
- Visible Contact
- No Drift Pressure Setting
- Captive Cover nut
- Ample Wiring Room
- 2 Ground Screw
- Easy to Adjust
- Pulsation Dampener Standard
- 5HP Heavy Duty Rating
- 250 PSI Max
- C US #220707, A030034
LF18 - 3
- Phase Air Compressor Pressure Switch
The LF18 3 Phase air compressor pressure switch is designed to regulate tank pressure between two preset values on a three phase electrically driven air compressor. The LF18 is available with an unloader valve which prevents the compressor from starting underload. This model is also available with an on/off knob to turn off the compressor when not in use.
Benefits & Features- Corrosion Resistant Cover
- Easy to Adjust
- Automatic Unloader Valve Available
- Optional four port manifold available
- Auto On/Off button for manual compressor shutoff available as optional feature
- Pulsation Dampener Standard
Water Pump Pressure Switches
- Our Water Pump Pressure Switches Make The Difference
Water pump pressure switches are critical for your operations. When only the best in switches will do, MAMCO is here to assist. We lead the industry in providing precision switches designed for a wide selection of applications.
MAMCO has been in business since 1964. We started out offering the best in customized molding solutions and have since expanded to include switches. From water pump pressure switches to high pressure switches, we design only the highest performing, most reliable products.
Our water pump pressure switches are designed to provide reliable control in pump systems. We offer pressure switches that will prevent the pump from starting if water pressure falls below cut-in pressure. In order to restore automatic operation when system pressure rises to switch operational level, an optional reset button is available on most of our water pump pressure switches. 
LF10-W
- The LF10-W pressure switch provides time tested, reliable
control for automatic water systems. This water pressure switch is
universally acceptable for use as original equipment on water pumps or
pumping systems. The LF10-WR can prevent the pump from starting whenever the
system falls considerably below cut- in pressure. Upon restoration of the
water supply, it will automatically cut in. A manual reset lever is
depressed until a build up of system pressure permits automatic operation.
Benefits & Features- Dependable control over automatic pump systems
- Prevents pump start in cases of extreme water pressure drop
- Optional reset button available
LF16
- The LF16 water pump pressure switch provides time tested
reliable control for automatic water supply systems. The switch is
universally acceptable for use as original equipment on water pumps or
pumping systems.
Benefits & Features- Reliable control over automatic pump systems
- High-performance in a variety of environments
- Available in normally closed switch configuration
LF17-W
- Commercial Water Pump Pressure Switch
The LF17- W is a rugged pressure switch designed for the demanding requirements of high pressure and heavy duty commercial water pump systems.
Benefits & Features- Visible Contact
- No Drift Pressure Setting
- Captive Cover nut
- Ample Wiring Room
- 2 Ground Screw
- Easy to Adjust
- Pulsation Dampener Standard
- 5HP Heavy Duty Rating
- 250 PSI Max
- US #220707
LF19
- The LF19 water pump pressure switches provide time
tested, reliable control for automatic water systems. The switch is
universally accepted for use as original equipment on water well pumps or
pumping systems. The pressure switch is available with an on- off knob to
manually cut off the pump when not in use. The LF19 pressure switch can also
be used to regulate the tank pressure between two preset values on one phase
electrically driven air compressors. This model is also equipped with an
unloader valve, which prevents the compressor from starting under load.
Benefits & Features- Optional auto On/Off button for manual compressor shutoff available
- Pulsation Dampener Standard
Pressure Switches
- When pressure switches are
needed for manufacturing or other applications, you need a product you can
rely on to perform and last. MAMCO is proud to present a line of pressure
switches that have been designed to fit a variety of applications and
perform perfectly in various environments.
MAMCO has been an industry leader in the production of customized molded components and sub-assemblies since 1964. We expanded our reach into the arena of pressure switches in 2004. Since entering this field, we are proud to say that our switches have fast earned the same great reputation that has enabled our company’s success for years.
Our pressure switches serve as an economical interface between pressure systems and PCBs. These strong and reliable pressure switches deliver rugged, reliable performance for a wide variety of OEM applications. Our innovative designs offer minimal hysteresis and accommodate different inlet tubing and terminal styles. Our pressure switches supply reliability and extended life even in harsh environments. 
LF20
- Extended Duty Low Pressure Switch
The LF20 pressure switch is specifically designed to stand up to extended duty applications. The switch is factory set but capable of field adjustment. A standard feature is a polyimide diaphragm for compatibility with a wide variety of fluids. The switch also offers various terminations including a Metric- Pack connector that forms a tight seal when connected. Design benefits include durable construction, compact size and enhanced set point integrity.
Benefits & Features- Various diaphragm materials are available to make it compatible with many mediums
- Many electrical terminations are available
- We offer an adjustment screw to enable fine tuning if required
- Tough, versatile choice for many OEM applications
MAM008
- The MAM0008 can monitor positive, vacuum and differential
pressures as low as .75 inches of water (1.9 millibar). This low profile
switch is manufactured with PCB terminals, making it ideal for high volume
OEM applications where accuracy and size are as critical as low cost.
The MAM008 is manufactured in the United States using high quality, environmentally friendly material that meets RoHas requirements. Like its bigger brother, the MAM005, the MAM008 utilizes MAMCO’s patented switch design. It incorporates gold cross bar contacts with an “all in one welded” contact terminal construction and floating module that delivers reliability and extended life in low pressure environments. This compact and light weight switch is compatible with different media such as air, liquids or gases.
Benefits & Features- PCB Mount Switch
- Available as a standard product tailored to user needs
- May be custom-designed for special applications
LF20-H
- The LF20-H is a high pressure/low set point pressure
switch for applications that see sudden pressure spikes and high pressures
which can result in early switch failures. This series has been strengthened
to prevent cracking of the base with plated steel and screw machined
components in a three piece design. Modifications to the effective area of
the pressure cavity, size of the diaphragm button and diaphragm o-ring are
what makes the switch capable of handling sudden pressure transients and
high system pressures that are common in applications such as braking,
transmission and hydraulic systems.
Benefits & Features- Designed to perform in higher pressure environments
- Various diaphragm materials are available to make it compatible with many mediums
- Many electrical terminations are available
- We offer an adjustment screw for fine tuningif required
- Tough, versatile choice for many OEM applications
LF25
- The LF25 pressure switch is used to control the pressure
of applications with higher current capacity. It’s widely used in steam
cleaners, steam irons and other pressure control systems. It provides SPST
or SPDT contact form and switch deadband (also referred to as mechanical
differential or hysteresis). The LF25 utilizes high quality miniature snap
action switches. The switch is a diaphragm operated. Diaphragm material can
be selected for the operating medium, temperature range and other
parameters. During the development of a specification, actuation points can
be adjusted by the designer but once the switch enters production, a factory
setting is required.
Benefits & Features- Multiple diaphragm options makes it compatible with many mediums
- Externally mounted snap action switch has current capacity up to 25 amps
- Durable, high-performance switch popular for applications where hysteresis is required
LF31
- The MAMCO LF31 series switch was designed for use in the
HVAC industry where safety and reliability are essential. Despite the design
intent, this series has proven to be a viable solution for many pneumatic
applications as well. Available in vacuum switch, differential switch, and
pressure models with fine silver or gold cross bar contacts, the LF31 is
capable of detecting very low pressures.
Factory calibrated units maintain set point tolerances of +/- 10% over a temperature range of -40 degrees F to 185 F due to its molded silicone diaphragm and the stability of its glass filled polyester body. MAMCO/LEFOO offers multiple electrical terminations and mounting options as well as bleed holes and three different size orifices. This switch series is not only the leading product in the market offering the highest quality and reliability but is also the most economical.
Benefits & Features- Available in vacuum, differential and pressure models
- Capable of detecting very low pressures
- Factory calibrated to maintain tolerances of +/- 10% over a temperature range of -40°F to 185°F
- Multiple electrical terminations and mounting options available
LF36
- The MAMCO LF36 water levels switch is a reliable
component used in conjunction with a solenoid valve to control the automatic
replenishment of water. The LF36 is widely used in washing machines, dish
washers, water fountains and other electronic applications.
Benefits & Features- It features solenoid valve control to produce reliable, efficient results
- Water level valve can be set to your specifications
- Great for monitoring water replenishment applications
LF40-01
- The MAMCO LF40-01 can be used in conjunction with an air
button (also called an actuator) in remote control applications widely used
in swimming pools and spa pumps, garbage disposers, outdoor machinery, and
medical equipment. Used as a remote control, the air switch has two actions:
- Momentary action- when the air button is pushed, the air switch is actuated. When the air button is released the air switch returns to its normal state
- Alternate Action (also referred to as latching)- The first push of the air button actuates the air switch. The switch will remain actuated until a second pulse of air sent from the air button is detected
- Air switch used in conjunction with an air button is ideal for remote control applications
- Performs reliably across a wide variety of applications
- Available in momentary or latching mode when used with an air button
Benefits & Features
MAM005
- Ultra-Low Pressure Switch
The MAMCO MAM005 is an ultra-low pressure switch that combines gold crossbar contacts with all in one welded contact terminal construction that delivers reliability and extended life in harsh, low pressure environments. The MAM005 line of ultra-low pressure vacuum switches and ultra-low pressure differential switches can be ordered pre-configured for immediate shipment, or ordered as a standard product tailored to user needs.
MAM005 can also be custom designed for special applications. The switches come configured with different port orientations to fit mounting requirements, and come in nine different diaphragm materials. The switches can be selected to assure chemical compatibility with most medium and reliable operation in temperature extremes.
Benefits & Features- Available preconfigured for immediate shipment
- Available as a standard product tailored to user needs
- May be custom-designed for special applications
- Preconfigured with different port orientations to fit mounting requirements
- Available in nine different diaphragm materials
LFS-02
- High Pressure Switch
he MAMCO/LEFOO LFS-02 high pressure switches are very small, lightweight units capable of detecting pressure, vacuum or differential pressures. The LFS-02 offers a number of features and options that make them ideal for many OEM applications. Some of these features include a body design that allows the ports to be rotated in order to fit in small spaces. The electrical terminations can be either solder pins, allowing the switch to be mounted and soldered directly on printed circuit boards or wire leads to suite many applications.
Benefits & Features- Can be used in vacuum, pressure and differential applications
- Innovative design offers almost no hysteresis
- Pressure port can accommodate various inlet tubing positions and terminal styles
- Industry standard choice for OEM applications
LFS-03
- PCB Mount & Negative Pressure Switch
The LFS-03 family of pressure switches is available in pressure, vacuum and differential models. The switches are light weight and can switch moderate current. Due to the non snap acting design, these pressure switches offer very little hysteresis and the set point is very stable and reliable.
Benefits & Features- Installation is a snap
- Controls parts with your pressure system
- Able to sense positive or negative pressure
- Suffers from almost no hysteresis
LF08PS
- The LF08PS pressure switch was developed to meet the
stringent needs of industrial applications in the HVAC industry, automotive
and off road equipment. This pressure switch is compatible with water,
hydraulic fluid, motor oils, and refrigerants. Some of its features include:
Automatic reset, factory calibrated set point, rugged construction, SPST
normally open and SPST normally closed contacts.
Benefits & Features- Various diaphragm materials are available to make it compatible with many mediums
- Many electrical terminations are available
- We offer an adjustment screw to enable fine tuning if required
- Tough, versatile choice for many OEM applications
Vacuum Pressure Switches
- Vacuum Switch You Can Count On To Perform
When you need a vacuum switch you can rely on for safety and to perform to the highest standards, MAMCO is here to assist. Our product line includes a variety of state-of-the-art designs, crafted to deliver the best in performance and reliability.
MAMCO is a trusted name in the industry. We’ve been around since 1964, specializing in customized molded components. Our precision switch division came online in 2004 and has quickly become a leader in the market. From vacuum switches and high pressure switch designs to differential pressure switches, we offer them all.
Now, if your project demands vacuum switches that will stand up to a variety of environments, our selection will not disappoint. Our vacuum switches offer excellent, reliable pressure detection for various electronic applications, including vacuum cleaners. Our vacuum switch series is incredibly popular due to its performance, durability and economical price; they are industry leaders and the preferred choice for electronic applications where safety and reliability are essential. 
LF20-V
- Vacuum Pressure Switch
The LF20- V pressure switch is specifically designed to stand up to extended duty applications. This switch is factory set. It features a fluorosilicone rubber diaphragm for compatibility with a wide variety of fluids and various terminations including a Metric- Pack connector that forms a tight seal when connected. The LF20 Vacuum switch benefits from its durable construction, compact size and enhanced set point integrity.
Benefits & Features- Fluorosilicone diaphragm makes it compatible with many mediums
- Many electrical and thread connections are available
- Durable, high-performance switch for versatile applications
MAM008
- The MAM0008 can monitor positive, vacuum and differential
pressures as low as .75 inches of water (1.9 millibar). This low profile
switch is manufactured with PCB terminals, making it ideal for high volume
OEM applications where accuracy and size are as critical as low cost.
The MAM008 is manufactured in the United States using high quality, environmentally friendly material that meets RoHas requirements. Like its bigger brother, the MAM005, the MAM008 utilizes MAMCO’s patented switch design. It incorporates gold cross bar contacts with an “all in one welded” contact terminal construction and floating module that delivers reliability and extended life in low pressure environments. This compact and light weight switch is compatible with different media such as air, liquids or gases.
Benefits & Features- PCB Mount Switch
- Available as a standard product tailored to user needs
- May be custom-designed for special applications
LF31
- The MAMCO LF31 series switch was designed for use in the
HVAC industry where safety and reliability are essential. Despite the design
intent, this series has proven to be a viable solution for many pneumatic
applications as well. Available in vacuum switch, differential switch, and
pressure models with fine silver or gold cross bar contacts, the LF31 is
capable of detecting very low pressures.
Factory calibrated units maintain set point tolerances of +/- 10% over a temperature range of -40 degrees F to 185 F due to its molded silicone diaphragm and the stability of its glass filled polyester body. MAMCO/LEFOO offers multiple electrical terminations and mounting options as well as bleed holes and three different size orifices. This switch series is not only the leading product in the market offering the highest quality and reliability but is also the most economical.
Benefits & Features- Available in vacuum, differential and pressure models
- Capable of detecting very low pressures
- Factory calibrated to maintain tolerances of +/- 10% over a temperature range of -40°F to 185°F
- Multiple electrical terminations and mounting options available
MAM005
- Ultra-Low Pressure Switch
The MAMCO MAM005 is an ultra-low pressure switch that combines gold crossbar contacts with all in one welded contact terminal construction that delivers reliability and extended life in harsh, low pressure environments. The MAM005 line of ultra-low pressure vacuum switches and ultra-low pressure differential switches can be ordered pre-configured for immediate shipment, or ordered as a standard product tailored to user needs.
MAM005 can also be custom designed for special applications. The switches come configured with different port orientations to fit mounting requirements, and come in nine different diaphragm materials. The switches can be selected to assure chemical compatibility with most medium and reliable operation in temperature extremes.
Benefits & Features- Available preconfigured for immediate shipment
- Available as a standard product tailored to user needs
- May be custom-designed for special applications
- Preconfigured with different port orientations to fit mounting requirements
- Available in nine different diaphragm materials
LFS-02
- High Pressure Switch
he MAMCO/LEFOO LFS-02 high pressure switches are very small, lightweight units capable of detecting pressure, vacuum or differential pressures. The LFS-02 offers a number of features and options that make them ideal for many OEM applications. Some of these features include a body design that allows the ports to be rotated in order to fit in small spaces. The electrical terminations can be either solder pins, allowing the switch to be mounted and soldered directly on printed circuit boards or wire leads to suite many applications.
Benefits & Features- Can be used in vacuum, pressure and differential applications
- Innovative design offers almost no hysteresis
- Pressure port can accommodate various inlet tubing positions and terminal styles
- Industry standard choice for OEM applications
LFS-03
- PCB Mount & Negative Pressure Switch
The LFS-03 family of pressure switches is available in pressure, vacuum and differential models. The switches are light weight and can switch moderate current. Due to the non snap acting design, these pressure switches offer very little hysteresis and the set point is very stable and reliable.
Benefits & Features- Installation is a snap
- Controls parts with your pressure system
- Able to sense positive or negative pressure
- Suffers from almost no hysteresis
Differential Pressure Switches
- Get A Differential Pressure Switch You Can Rely On
For Performance
When you need a differential pressure switch, performance, durability, reliability and affordability all matter. At MAMCO, we’re here to provide you with all three. Our pressure switches are designed by the best to be the best.
MAMCO has been an industry leader in customized molded components since 1964. In 2004, we enhanced our operations by adding the Precision Switch Division. Ever since then, we’ve been providing customers all over the world with the finest differential pressure switch designs available. Our company name stands for quality customers know they can rely on.
Our differential pressure switches provide rugged versatility for a wide variety of applications requiring switch placement. Some of our differential pressure switch designs can sense gauge or differential pressure with almost no hysteresis in configurations of positive or negative pressure. Our differential pressure switches are recognized as leaders in the pressure switch game.
If you require a differential pressure switch, we offer a variety for you to choose from. It’s our intent to make sure you have a selection of products to suit just about any application. Switches in our line include:- MAM008 Differential Pressure Switch
- LF31 Differential Pressure Switch
- MAM005 Differential Pressure Switch
- MAM007 Differential Pressure Switch
- LFS-02 Differential Pressure Switch
- LF32 Differential Pressure Switch
- LF37 Differential Diaphragm Pressure Switch
- LFS-03 PCB Mount Differential Pressure Switch