Features

• The DPU74W series is a differential pressure switch with waterproofing.
• The switch body is made of aluminum die-casting, making it lightweight and sturdy.
• The standard controlled fluid is suitable for air, water, oil (fluid temperature -10 to 90°C), etc.
• Stainless steel bellows are also available as an option for corrosive fluids, hot water, etc.
• Depending on the type of fluid, careful consideration is required, so please consult our sales staff for details.

Product Information

Option

• Pressure receiving part made of stainless steel (SUS316)
• Low voltage and low current compatible products
• Compatible with various connection sizes

Specifications

Model Code Explanation

Electrical Rating Table

Features

• The DPU72W series is a waterproof differential pressure switch for indoor and outdoor installation.
• The switch body is made of aluminum die-casting, making it lightweight and sturdy.
• The standard controlled fluids are air, water, and oil (fluid temperatures of -10 to 90°C), etc.
• Stainless steel bellows are also available as an option for corrosive fluids, hot water, etc.
• Depending on the type of fluid, careful consideration is required, so please consult our sales staff for details.

Product Information

Option

• Pressure receiving part made of stainless steel (SUS316)
• Low voltage and low current compatible products
• Compatible with various connection sizes

Specifications

Model Code Explanation

• Note 1: Wetted-part materials are only applicable to phosphor bronze models.

Electrical Rating Table

Features

• The OPL-650 series is ideal for indoor locations that require dust-proofing and drip-proofing, and like the OPL-550 series, is widely used in industrial machinery, hydraulic filters, compressors, chemical plants, etc., along with industrial air and hydraulic control devices.
• The set value can be changed from the outside without removing the cover.
• A metal bellows is used for the pressure-receiving element.
• In addition, the tip of the operating lever has a quick action mechanism that uses the repulsive force of a spring, making this a differential pressure switch that operates accurately in conjunction with the sensitive action of a snap switch.

Product Information

Option

• Pressure receiving part made of stainless steel (SUS316)
• 2ab type (6 terminals) snap switch
• Compatible with various connection sizes

Specifications

Model Code Explanation

• Note 1: Only compatible with phosphor bronze type.
• Note 2: For F6 flare fitting type, bracket mounting type (with bracket) is required.

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Features

• The OPL-550 series is a general-purpose differential pressure switch that is widely used in industrial machinery, hydraulic filters, compressors, chemical plants, etc. along with industrial air and hydraulic control devices.
• The set value can be changed from the outside without removing the cover.
• A metal bellows is used for the pressure-receiving element.
• In addition, the tip of the operating lever has a quick action mechanism that uses the repulsive force of a spring, and this differential pressure switch operates accurately in conjunction with the sensitive action of a snap switch.

Product Information

Option

• Pressure receiving part made of stainless steel (SUS316)
• 2ab type (6 terminals) snap switch
• Compatible with various connection sizes

Specifications

Model Code Explanation

• Note 1: Only compatible with phosphor bronze type.
• Note 2: For flare type fittings (F6), the mounting bracket (type B) is required.

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Features

• The VU74W series is a waterproof vacuum switch for outdoor use.
• The body cover is made of aluminum die-cast, and the protective structure is equivalent to IP65 (IEC529).
• It is suitable for narrowing the opening and closing vacuum difference (ON-OFF width) in negative pressure settings, and for upper limit alarms (single point setting) or lower limit alarms (single point setting).
• The adjustment screw is fixed with a vibration and abuse prevention bracket.
• The pressure receiving part uses phosphor bronze bellows as standard.
• Stainless steel bellows are also available as an option for corrosive fluids, hot water, etc.

Product Information

Option

• Pressure receiving part made of stainless steel (SUS316)
• Body mounting feet (brackets) included
• Low voltage and low current compatible products
• Compatible with various connection sizes

Specifications

Model Code Explanation

• Note 1: Only applicable to phosphor bronze models.

Electrical Rating Table

Features

• The VU7 series is a vacuum switch for indoor use.
• It is suitable for narrowing the open/close vacuum difference (ON-OFF width) in negative pressure settings, and for upper limit alarms (single point setting) or lower limit alarms (single point setting).
• The adjustment screw is fixed with a vibration and abuse prevention bracket.
• The pressure receiving part uses phosphor bronze bellows as standard.
• Stainless steel bellows are also available as an option for corrosive fluids, hot water, etc.

Product Information

Option

• Pressure receiving part made of stainless steel (SUS316)
• Body mounting feet (brackets) included
• Low voltage and low current compatible products
• Compatible with various connection sizes

Specifications

Model Code Explanation

• Note 1: These port sizes are only available for phosphor bronze models.

Electrical Rating Table

Features

• The PL-650 series is ideal for indoor locations that require dust-proofing and drip-proofing, and like the PL-550 series,
• it is widely used as a general-purpose vacuum switch in the industrial sector, medical equipment, chemical plants, etc.
• A metal bellows is used for the pressure-receiving element.
• The tip of the operating lever has a quick action mechanism with a coil spring, and the electrical open/close mechanism is also sensitive.
• Furthermore, the double action of the snap action switch makes this an automatic vacuum control device with high accuracy and reliability.
• In addition, the set value can be readjusted from the outside without removing the cover, and a scale plate (indicator) is attached so that the set value can be seen at a glance.

Product Information

Option

• Pressure receiving part made of stainless steel (SUS316)
• Body mounting feet (brackets) included
• 2ab type (6 terminals) snap switch
• Compatible with various connection sizes

Specifications

Wetted‑Part Material

• Metal bellows are used for vacuum detection. In the standard model, the bellows are made of phosphor bronze, which is suitable for non‑corrosive gases and liquids—such as air and water—at temperatures up to 90 °C.
• For steam above 100 °C or for corrosive liquids, stainless steel (SUS316) is also available as an optional material.

Model Code Explanation

• Note 1: Wetted parts are phosphor bronze only, suitable for non-corrosive media.
• Note 2: F6 (flare fitting) requires a mounting bracket (type B) by design.

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Features

• The VL-550 series is a general-purpose vacuum switch that is widely used in the industrial sector, medical equipment, chemical plants, etc. as a vacuum pump automatic operation and vacuum automatic control device.
• A metal bellows is used for the pressure-receiving element.
• The tip of the operating lever has a quick action mechanism with a coil spring, and the electrical open/close mechanism
  is also sensitive, and the double action of the snap action switch makes this a highly accurate and reliable vacuum automatic control device.
• In addition, the set value can be readjusted from the outside without removing the cover, and a scale plate (indicator) is attached so that the set value can be seen at a glance.

Product Information

Option

• Pressure receiving part made of stainless steel (SUS316)
• Body mounting feet (brackets) included
• 2ab type (6 terminals) snap switch
• Compatible with various connection sizes

Specifications

Connecting Part Material

• The vacuum inspection uses brass bellows, and the standard material is brass.
• It is used for air and water-based liquids at temperatures below 90°C. For steam or liquids exceeding 100°C, stainless steel (SUS316) is available as an option.

Model Code Explanation

• Note 1: The connecting material is only compatible with brass material.
• Note 2: When the connection part is a flange type, the specification will include the main body mounting (bracket).

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Features

• The PDS series allows easy and free pressure adjustment using the adjustment knob on the top of the main unit.
• The pressure adjustment range is 0.5 to 3.0 MPa, and the pressure resistance is 6.0 MPa, which is in the middle range among the bar control series.
• In addition, the pressure receiving part is a diaphragm type, which ensures a long life.

Product Information

Specifications

Model Code Explanation

Features

• The PDC/HDC series are compact in design and allow for setting the hysteresis (opening/closing pressure difference).
• A DIN terminal block is included as standard.
• The pressure receiving structure is a diaphragm type for the PDC series and a piston type high pressure specification for the HDC series.

PDC Series

■Product Information

■Option

• Pressure receiving part made of stainless steel (SUS303)
• Pressure receiving diaphragm material change (FKM, EPDM, HNBR)

■Specifications

■Model Code Explanation

■Contact Capacity

• Minimum Current: 5 mA

HDC Series

■Product Information

■Specifications

■Model Code Explanation

■Contact Capacity

Features

• The PDL/HDL series are pressure switches with a highly versatile and ultra-compact design.
• They are ideal as limit switches for upper and lower limit alarms with a single setting.
• The pressure receiving section structure is a diaphragm type for the PDL series and a piston type with high pressure resistance for the HDL series.
• In addition, various options are available to accommodate a wide range of applications.

PDL Series

■Product Information

■Option

• Pressure receiving part made of stainless steel (SUS303)
• Pressure receiving diaphragm material change (FKM, EPDM, HNBR)
• Protective cover
• Body mounting legs (brackets)

■Specifications

■Model Code Explanation

■Contact Capacity

• Minimum Current: 5 mA

HDL Series

■Product Information

■Option

• Protective cover
• Body mounting legs (brackets)

■Specifications

■Model Code Explanation

■Contact Capacity

• Minimum Current: 5 mA

Features

• The PU72W series is an outdoor waterproof pressure switch.
• The switch body is made of aluminum die-casting, making it lightweight and sturdy.
• It is suitable for situations where you want to narrow the opening and closing pressure difference (ON-OFF width) in the pressure setting, or for upper limit alarm (1 point setting) or lower limit alarm (1 point setting).

Product Information

Option

• Pressure receiving part made of stainless steel (SUS316)
• Body mounting feet (brackets) included
• Low voltage and low current compatible products

Specifications

Model Code Explanation

Electrical Rating Table

Features

• The PU62W series is a waterproof pressure switch for outdoor use.
• The body cover is made of die-cast aluminum, and the weather-resistant neoprene packing ensures high shielding, so it can be used outdoors in rainy or humid environments.
• The set pressure can be seen at a glance with the two pointers on the scale plate, and the set pressure and opening/closing pressure difference (ON-OFF width) can be freely, quickly, and easily adjusted.
• In addition, the pressure resistance is 5.0 MPa, and the electrical and mechanical life is over 1 million times, making it longer-lasting than the conventional bellows type.

Product Information

Option

• Pressure receiving part made of stainless steel (SUS316)
• Body mounting feet (brackets) included
• Low voltage and low current compatible products

Specifications

Model Code Explanation

Electrical Rating Table

Features

• The PS series is a small, lightweight pressure switch developed to be installed inside control panels and small devices.
• It is also used for abnormal operation alarms for air clutches and balancers of presses.
• The opening and closing pressure difference (ON-OFF width) is fixed, and is suitable for single-point settings at the upper or lower limit.
• We also offer models with indicator lamps that allow visual confirmation of the operating state.

Product Information

Specifications

Features

• The P series is a pressure switch for direct load control designed for automatic control of various pumps and air compressors as well as all pneumatic and water pressure control applications.
• The difference from conventional pressure switches is that a long-life diaphragm is used in the pressure receiving part, and although the main operating lever is a slow motion mechanism, the contact opening and closing mechanism is a mechanism that operates reliably with a quick action lever.
• Even though it is small, it has a large breaking capacity of the contact and operates extremely accurately with little cumulative error, making it a long-life, highly reliable, compact pressure switch.

Product Information

Specifications

Model Code Explanation

• The indoor pressure switch P Series (models: P-3, P-6, P-10) is a product developed for direct load control (e.g., pumps or compressors up to 2.2 kW output).
• Although its electrical capacity is designed to be greater than our other products, using it outdoors may cause poor insulation and negatively affect load operation.

Contact Current Rating Table

Features

• The PU74W series is a waterproof outdoor pressure switch. It can be used outdoors in rainy or humid environments.
• It is suitable for narrowing the open/close pressure difference (ON-OFF width) and for upper limit alarm (single point setting) or lower limit alarm (single point setting).
• The adjustment screw can be fixed with anti-vibration and abuse metal fittings.
• In addition, aluminum die-casting is used for the main body cover, and high shielding is ensured by weather-resistant neoprene packing.
• Phosphor bronze bellows is used for the pressure receiving part, and stainless steel (SUS316) bellows can also be selected for corrosive fluids, hot water, etc.

Product Information

Option

• Pressure receiving part made of stainless steel (SUS316)
• Body mounting feet (brackets) included
• Low voltage and low current compatible products
• Compatible with various connection sizes

Specifications

Model Code Explanation

• Note 1: Connection part materials are limited to phosphor bronze specification only.
• Note 2: For φ6 flare type, product is configured with body mounting bracket.

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Features

• The PU64W(GA10) series is an outdoor waterproof pressure switch equipped with a φ60 mm sealed pressure gauge.
• The pressure setting value can be easily checked at a glance using the two pointers displayed on the dial plate of the switch body.
• In addition, the pressure setting and ON-OFF pressure differential adjustments can be performed freely and quickly using two adjustment screws while checking the pressure gauge on-site.
• The pressure switch body uses aluminum die-cast construction. The main unit has a protection rating equivalent to IP65 (IEC529), and the pressure gauge has a rating equivalent to IP54 (IEC529).
• Conventionally, the pressure gauge and pressure switch required separate piping systems. Integrating them into one simplifies installation, reduces working time, and eliminates unnecessary piping components.
• When adjusting the pressure setting of the switch, simply glancing down allows to easily check the pressure value and smoothly adjust the settings.
• Enables pressure value monitoring on-site.

• The previously separated piping can now be neatly consolidated, simplifying operations.

Specifications

• Only compatible with connection diameter R3/8 (PT 3/8 thread).
• The PU64W-10-R3-GA10 has a pressure resistance of 1.5 MPa, but since the full scale of the pressure gauge is 1.0 MPa, please use it at 1.0 MPa or below.

Product Appearance

Features

• The PU64W series is a waterproof pressure switch for outdoor use.
• The body cover is made of die-cast aluminum, and the weather-resistant neoprene packing ensures high sealing performance, so it can be used outdoors in rainy or humid environments.
• The two pointers on the scale plate allow you to see the set pressure at a glance, and the set pressure and opening/closing pressure difference (ON-OFF width) can be freely, quickly and easily adjusted with two adjustment screws.

Product Information

Option

• Pressure receiving part made of stainless steel (SUS316)
• Body mounting feet (brackets) included
• Compatible with various connection sizes

Specifications

Model Code Explanation

• Note 1: The connection part material is only available in phosphor bronze specification.
• Note 2: For φ6 flare type connections, the unit comes with a body mounting bracket.

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Features

• The PU7 series is suitable for narrowing the open/close pressure difference (ON-OFF width) and for upper limit alarm (single point setting) or lower limit alarm (single point setting).
• The adjustment screw is fixed with a vibration and abuse prevention bracket.
• A phosphor bronze bellows is used for the pressure receiving part.
• Stainless steel (SUS316) bellows can also be selected for corrosive fluids, hot water, etc.

Product Information

Option

• Pressure receiving part made of stainless steel (SUS316)
• Body mounting feet (brackets) included
• Low voltage and low current compatible products
• Compatible with various connection sizes

Specifications

Model Code Explanation

• Note 1: Only supports phosphor bronze specification for connection parts.
• Note 2: For φ6 flare type connections, the product comes with a main body mounting bracket.

Electrical Rating Table

Features

• The PU6(GA10) series  is an indoor general-purpose pressure switch equipped with a φ50 mm pressure gauge.
• The pressure setting value can be easily checked at a glance using the two pointers displayed on the dial plate of the switch body.
• Additionally, the pressure setting value and the pressure differential (ON-OFF range) can be adjusted easily and responsively using two adjustment screws while observing the pressure gauge on-site.
• By integrating the previously separate systems of pressure gauge and pressure switch into one unit, it is possible to reduce work time and eliminate piping components.
• When changing the pressure setting value of the pressure switch, simply lowering your line of sight allows easy confirmation of the pressure value and smooth adjustment of the setting.
• Enables pressure value monitoring directly on-site.

• The previously separate piping can now be streamlined, enabling simplification of operations.

Specifications

• Only compatible with connection diameter R3/8 (PT 3/8 thread).
• The PU6-10-R3-GA10 has a pressure resistance of 1.5 MPa, but since the full scale of the pressure gauge is 1.0 MPa, please use it under 1.0 MPa.

Product Appearance

Features

• The PU6 series allows the set pressure to be seen at a glance thanks to the two pointers on the scale plate.
• In addition, the set pressure and opening/closing pressure difference (ON-OFF width) can be freely, quickly and easily adjusted using two adjustment screws.
• The contacts have a snap action mechanism that is resistant to vibration and has excellent resistance to chattering.
• The adjustment screws are fixed with metal fittings to prevent vibration and abuse.
• The pressure receiving part uses phosphor bronze bellows, and stainless steel (SUS316) bellows can also be selected for corrosive fluids, hot water, etc.

Product Information

Option

• Pressure receiving part made of stainless steel (SUS316)
• Body mounting feet (brackets) included
• Compatible with various connection sizes

Specifications

Model Code Explanation

• Note 1: For connection parts, only phosphor bronze specification is supported.
• Note 2: When the connection part is φ6 flare type, the model comes with main body mounting bracket.

Electrical Rating Table

Features

• The PU3 series is a small, lightweight, and simple design, with two adjustment screws that allow the pressure setting and opening/closing pressure difference (ON-OFF width) to be freely adjusted.
• The electrical contacts have a snap action mechanism and are resistant to vibration, especially chattering.
• The pressure receiving part uses a diaphragm (synthetic rubber), which ensures a long life along with the internal mechanism parts.
• Careful consideration is required depending on the type of fluid, so please consult our sales representative for details.

Product Information

Option

• Pressure receiving part made of fluororubber (FKM)
• Body mounting feet (brackets) included

Specifications

Model Code Explanation

• Note : Only the PU3-15 type uses FKM (fluororubber) for the diaphragm material as standard.

Features

• The PSP-200A series is designed for automatic control of small and medium-sized air compressors.
• When the compressor starts and the pressure rises, the electrical contacts turn OFF when it reaches the upper limit setting, and
  at the same time, the release valve attached to the rear automatically exhausts the residual pressure in the compressor pressurization section from the piping.
• A special bellows is used in the pressure receiving section, and the release valve operates and the contacts open simultaneously with a rapid movement of the operating lever, and the release valve returns to its original position and the contacts close at startup.

Product Information

Specifications

• The release valves to suit the piping size: RV-14N for Φ6mm, RV-22 for Φ6.35mm (1/4in.)
• Since piping sizes vary depending on the compressor manufacturer, be sure to check the piping size before purchasing and install the appropriate release valve.

Model Code Explanation

• Note: PSP–200B is an automatic reset switch that does not require a relief valve.

Features

• The P6S series is ideal for indoor locations that require dust-proofing and drip-proofing, and is widely used as automatic control equipment for machine tools, industrial machinery, chemical plants, etc.
• The feature of this series is that it does not require a long time to set the pressure while watching the pressure gauge as in the past, and you can easily adjust to the desired setting with just a spanner and a flat-head screwdriver.
• The internal mechanism is manufactured with the same contents as the P5S series.

Product Information

Option

• Pressure receiving part made of stainless steel (SUS316)
• Body mounting feet (brackets) included
• 2ab type (6 terminals) snap switch
• Compatible with various connection sizes

Specifications

*P6S-60 and P6S-80 are for high pressure control and the pressure receiving part is made of stainless steel (SUS316) as standard.

Model Code Explanation

• Note 1: When the connection part is a φ6 flare type, the specification will be with main body mounting bracket (with bracket).

Electrical Rating Table

Features

• The P5S series is a general-purpose pressure switch that is widely used as an automatic control device for hydraulic, pneumatic, water and liquid pressure in machine tools, industrial machinery, chemical plants, power plants, etc.
• The snap action mechanism makes this a highly reliable pressure switch with a long life.
• Pressure adjustment can also be made from the outside without removing the body cover, and indicators for the upper limit pressure setting and the opening and closing pressure difference are provided so that the upper limit pressure and the upper limit pressure setting can be seen at a glance, allowing for quick and easy readjustment on site.

Product Information

Option

• Pressure receiving part made of stainless steel (SUS316)
• Body mounting feet (brackets) included
• 2ab type (6 terminals) snap switch
• Compatible with various connection sizes

Specifications

*P5S-60 and P5S-80 are for high pressure control and the pressure receiving part is made of stainless steel (SUS316) as standard.

Model Code Explanation

• Note 1: When the connection part is a φ6 flare type, the specification will be with main body mounting bracket (with bracket).

Electrical Rating Table

Features

• The PM-60 series is ideal for indoor locations that require dustproofing and drip-proofing, and like the PM-50 series, it has a built-in microswitch in the contact area, making it suitable for situations where you want to set a narrow opening and closing pressure difference (ON-OFF width).
• For DC use with a large current, a DC microswitch is built in.
• The pressure receiving part uses a metal bellows (phosphor bronze or SUS316), and the snap action switch with fewer malfunctions and variations and the quick action mechanism at the end of the main operating lever make this a highly reliable pressure switch with less accumulated error.

Product Information

Option

• Pressure receiving part made of stainless steel (SUS316)
• Body mounting feet (brackets) included
• 2ab type (6 terminals) snap switch
• Compatible with various connection sizes

Specifications

*PM-606 and PM-607 are for high pressure control and the standard material for the pressure receiving part is stainless steel (SUS316).

Model Code Explanation

• Note 1: The material for the connection part is only available in phosphor bronze specification.
• Note 2: When the connection part is a φ6 flare type, the specification will be with main unit mounting bracket (with bracket).

Electrical Rating Table

Features

• The PM-50 series is a general-purpose pressure switch that is widely used in all industries.
• This pressure switch has a built-in microswitch in the contact area, making it suitable for situations where you want to set a narrow opening and closing pressure difference (ON-OFF width).
• For DC use with a large current, a DC microswitch is built in.
• A metal bellows (phosphor bronze or SUS316) is used in the pressure receiving area, and the snap action switch with fewer malfunctions and variations and the quick action mechanism at the end of the main operating lever make this a highly reliable pressure switch with less accumulated error.

Product Information

Option

• Pressure receiving part made of stainless steel (SUS316)
• Body mounting feet (brackets) included
• 2ab type (6 terminals) snap switch
• Compatible with various connection sizes

Specifications

*PM-506 and PM-507 are for high pressure control and the standard material for the pressure receiving part is stainless steel (SUS316).

Model Code Explanation

• Note 1: The material for the connection part is only available in phosphor bronze specification.
• Note 2: When the connection part is a φ6 flare type, the specification will be with main unit mounting bracket (with bracket).

Electrical Rating Table

Features

• The PL-650 series is ideal for indoor locations that require dust-proofing and drip-proofing, and like the PL-550 series, the opening and closing pressure difference (ON-OFF width) can be set narrowly, making it widely used in all industries.
• A metal bellows is used in the pressure receiving part, making it a snap action switch with few malfunctions and variations, and the quick action mechanism at the tip of the main operating lever makes it a long-lasting and highly reliable pressure switch.

Product Information

Option

• Pressure receiving part made of stainless steel (SUS316)
• Body mounting feet (brackets) included
• 2ab type (6 terminals) snap switch
• Compatible with various connection sizes

Specifications

*PH-650-8 and PH-650-9 are for high pressure control and the standard material for the pressure receiving part is stainless steel (SUS316).

Model Code Explanation

• Note 1: The connection part material is only available in phosphor bronze specification.
• Note 2: For the φ6 flare type connection, the unit comes with a mounting bracket.

Electrical Rating Table

Features

• The PL-550 series is a general-purpose pressure switch that is widely used in all industries.
• The features of this pressure switch are different from those for general compressors or pumps, and it is ideal when you want to set a narrow opening and closing pressure difference (ON-OFF width).
• It is mainly used for water pressure, pneumatic pressure, hydraulic pressure, etc. related to instrumentation.
• A metal bellows is used for the pressure receiving part, and the snap action type switch with few malfunctions and variations and the quick action mechanism at the tip of the main operating lever make this a pressure switch with a long life and high reliability.

Product Information

Option

• Pressure receiving part made of stainless steel (SUS316)
• Body mounting feet (brackets) included
• 2ab type (6 terminals) snap switch
• Compatible with various connection sizes

Specifications

*PH-550-8 and PH-550-9 are for high pressure control and the standard material for the pressure receiving part is stainless steel (SUS316).

Model Code Explanation

• Note 1: The material for the connection part is only available in phosphor bronze specification.
• Note 2: For φ6 flare type connections, the product comes with a mounting bracket (body mounting foot).

Electrical Rating Table