423T4-21-U

The Barksdale 423T4-21-U pressure switch is an essential instrument designed to monitor and control fluid pressure in various industrial and commercial applications. This pressure switch is part of Barksdale Controls' 4200 Series, which is known for its durability, reliability, and ease of use.

The 423T4 model is a two-stage, normally open (NO) switch, which means it will open when the set pressure is reached. It is suitable for applications that require pressure switching between 21 and 150 psi (1.5 and 10.3 bar). The switch body is constructed from brass, ensuring resistance to corrosion and prolonging the life of the component. The diaphragm is made of stainless steel, providing additional durability and resistance to harsh environments.

The 423T4-21-U pressure switch features a user-friendly design, with a visible pressure gauge that allows for easy pressure monitoring. The switch has a threaded connection (UNF 1/4-27) for simple installation and can be mounted horizontally or vertically, depending on the application requirements. The switch also comes with a standard 3/32" x 1-1/2" M3 x 12 stainless steel set screw for secure mounting.

This pressure switch operates on a wide temperature range, from -20 F to 257 F (-29 C to 125 C), making it suitable for use in various industries, including HVAC, oil and gas, and water treatment. The 423T4-21-U pressure switch is also ATEX and IECEx certified, ensuring compliance with the European Union's explosion-proof safety standards for use in potentially explosive atmospheres.

In conclusion, the Barksdale 423T4-21-U pressure switch is a versatile, reliable, and easy-to-use component designed for monitoring and controlling fluid pressure in various industrial and commercial applications. Its durable brass body, stainless steel diaphragm, and wide temperature range make it a suitable choice for use in a variety of industries and conditions. The switch's user-friendly design, with a visible pressure gauge and easy installation process, further enhances its value and makes it an essential tool for maintaining optimal pressure levels in various systems.

The Barksdale 423T4-21-U pressure switch is a pneumatic device designed to activate or deactivate an electrical circuit when a specific pressure is reached. Here are some pros and cons that may help you make an informed decision about purchasing this pressure switch:

1. Reliable Performance: Barksdale is known for manufacturing high-quality pneumatic components. The 423T4-21-U pressure switch is no exception. It is built to provide consistent and reliable performance in various industrial applications.

2. Wide Operating Pressure Range: This pressure switch can operate in a wide range of pressures, from 3 to 21 psi. This makes it a versatile option for different applications.

3. Adjustable Set Point: The set point of the pressure switch can be easily adjusted using the knob on the top of the switch. This feature allows users to fine-tune the switch to meet their specific application requirements.

4. Rugged Design: The 423T4-21-U pressure switch is built to withstand harsh industrial environments. It has a sturdy housing made of cast aluminum and is resistant to vibration and shock.

5. Easy Installation: The pressure switch comes with a clear installation manual and is easy to mount on a panel or a pipe.

1. Limited Temperature Range: The pressure switch is not designed to operate in extreme temperatures. Its operating temperature range is from 32 F to 122 F (0 C to 50 C).

2. Requires Calibration: Like any pressure switch, the Barksdale 423T4-21-U needs to be calibrated regularly to ensure accurate pressure sensing. Calibration may require specialized equipment and expertise.

3. Not Suitable for High-Pressure Applications: This pressure switch is not designed for high-pressure applications. Its maximum operating pressure is only 21 psi.

In conclusion, the Barksdale 423T4-21-U pressure switch is a reliable and versatile option for applications that require pressure sensing in a wide range of pressures. Its rugged design and easy installation make it a popular choice in industrial settings. However, its limited temperature range and suitability for only low-pressure applications may be a drawback for some users. Ultimately, the decision to purchase this pressure switch depends on the specific requirements of your application. If your application falls within the operating range of the switch, its benefits may outweigh its limitations.

Details:

specifications indusswitch:

• brand: Barksdale
• mpn: 423t4-21-u
• part type: Pressure Switch
• current type: Ac
• material: Plastic
• fiberglass/glass-reinforced plastic: Grp

seller indusswitch:

• city: hebron, kentucky
• # reviews: 130
• rating: 98.8%

offer indusswitch:

• sold #: 14
• best offers: true
• options: ship-to-home
• availability: in stock
• in stock #: 5
• started: january 1, 2026
• prices: $119.99–$436.94
• item condition:
  • New
  • New – Open box

shipping indusswitch:

• carrier: usps
• transit: 7-11 days
• service: usps ground advantage
• type: fixed
• class: standard

payments indusswitch:

• other
• credit card: visa
• wallet: paypal

general indusswitch:

• category: Business & Industrial > Electrical Equipment Supplies > Pressure Switches

returns indusswitch:

• method: money back
• time: 14 days
• policy: returns accepted
• paid by: buyer

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