SJ Gauge contact pressure gauges with electrical switching

Contact Pressure Gauges

A contact pressure gauge combines pressure measurement and electrical control functions in a single device. While monitoring pressure, it can output electrical signals through its internal contacts. When the pressure reaches the preset upper or lower limit, the contacts automatically actuate to start, stop, or trigger alarms for related equipment, making it an essential component in industrial automation and safety control systems.

Contact Pressure Gauges FAQ

Selection questions for electric contact gauges used for pressure indication, alarms, and equipment control.

What is a contact pressure gauge used for?
A contact pressure gauge combines local pressure indication with electrical switching. It can trigger alarms, start or stop equipment, and support simple automation when pressure reaches preset upper or lower limits.
How do I choose the contact type?
Magnetic snap-action contacts are common for many industrial applications, inductive contacts are suitable for low-energy or hazardous-area signal requirements, and reed or special contacts may be selected for specific control circuits.
When should I choose an explosion-proof contact gauge?
Explosion-proof or intrinsically safer contact options should be considered in chemical, petroleum, gas, metallurgy, or other hazardous environments where sparks or electrical energy must be controlled. Confirm the required safety classification before selection.
Can the set point be adjusted?
Many contact pressure gauges allow adjustable set points. Selection should consider pressure range, number of contacts, switching direction, contact rating, vibration, case material, and whether liquid filling or special protection is needed.
  • SJ Gauge European-style alarm switch contact pressure gaugeSJ Gauge European-style warning contact pressure gauge
    Model: PRE4.H

    Electric Contact Gauge, magnetic snap-action

    • Stainless steel bezel with glass window, beautiful but still durable
    • A variety of contact types to choose from
    • Used in chemical, petroleum, metallurgy, machinery and other industries
    • Same specifications as WIKA-PGS23
    • Switch Contact Pressure Gauge, Euro Warning/Alarm Contact
  • SJ Gauge three-inch pressure gauge with warning alarm contactSJ Gauge pressure gauge with adjustable warning alarm contact
    Model: PRE3

    Electric Contact Gauge, 3 inches

    • Suitable for observation and automatic control
    • Adjustable magnetic strength to avoid frequent, accidental collision of contacts due to vibration
    • A variety of contact types to choose from
  • SJ Gauge pressure gauge with electrical contact switch
    Model: PRE-IDT

    Electric Contact Gauge, inductive contact

    • Spark-free operation and low-energy signals, ensuring safety in explosive environments.
    • A Various contact types available
    • Used in chemical, petroleum, metallurgy, machinery and other industries
    • Same specifications as WIKA 831
    • Switch Contact Pressure Gauge, Euro Warning/Alarm Contact
  • Explosion-proof switch contact used in an SJ Gauge pressure gaugeSJ Gauge explosion-proof electric contact pressure gauge
    Model: PRE-XS

    Electric Contact Gauge, explosion-proof

    • Suitable for observation and automatic control
    • Adjustable magnetic strength to avoid frequent, accidental collision of contacts due to vibration
    • A variety of contact types to choose from