OEM China Suppliers Electric Contact Pressure Gauge – 5 Bar / 75 PSI, All-SS, Automatic Control & Alarm Factory Output Manufacturers, Factories

Introducing our all-stainless steel electric contact pressure gauge, a highly automated instrument designed for precise pressure measurement, display, control, and alarm functions. This advanced device builds upon the traditional Bourdon tube pressure gauge by incorporating an electric contact mechanism. This innovation not only allows for a clear and intuitive pressure reading but also enables automatic control of the pressure system when the pressure reaches set upper or lower limits, Users can effortlessly set the upper and lower limit signal pointers to desired pressure values using intuitive knobs or a specialized tool. Once the actual pressure reaches the upper limit, the moving contact of the measuring pointer engages with the upper limit stationary contact, generating an overpressure switch signal. Conversely, if the pressure falls to the lower limit, it activates the lower limit stationary contact, producing an underpressure switch signal. These signals can seamlessly interface with intermediate relays, contactors, or PLCs, facilitating control over motors, solenoid valves, alarms, and other essential equipment, As a trusted manufacturer and supplier in China, our factory is committed to delivering high-quality electric contact pressure gauges that meet international standards, ensuring reliable performance and durability for your pressure monitoring needs. Choose our electric contact pressure gauge for superior automation and protection in your operations

Product Description

Product Specifications
Case Stainless steel
Size 100mm (4")
Ring (Cover) Stainless steel
Window Glass
Pointer Aluminum Alloy, Black Finished
Connection Stainless steel
Connection Location Lower
Thread 1/2" BSP
Element (Bourdon Tube) Stainless steel
Movement Stainless steel
Dial Plate White Aluminum with Black Graduations
Core Features and Advantages
⚡ Precise & Reliable Electrical Contact Control
High-Precision Contact Action: Employing magnetically assisted electrical contacts or a double-contact design reduces the impact of electric arcs, ensuring stable contact switching and preventing malfunctions.
Adjustable Upper & Lower Limit Settings: Users can flexibly adjust the pressure control range via the setting pointer on the dial, enabling automatic alarms or equipment start/stop (such as water pumps and air compressors).
Stable Signal Output: Moderate contact capacity (typically AC 220V/380V, 3A–5A) allows direct driving of small and medium-sized relays or contactors, simplifying the control system.
🛡️ Safety & Ease of Maintenance
Electric Shock Protection: The all-steel casing is well-grounded, reducing the risk of leakage and ensuring operational safety.
Clear Display & Operation: The large dial design makes pressure values and contact settings clearly visible, eliminating the need to open the casing to adjust settings.
Low Maintenance Requirements: Robust construction and long contact life (typically exceeding 100,000 cycles) reduce replacement frequency.
Typical Application Fields
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Industrial Process Control Used in hydraulic systems, pneumatic systems, boilers, compressors, pumps, and other equipment to automatically maintain pressure within safe ranges.
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Safety Protection & Alarms In pressure vessels, pipelines, HVAC systems, etc., triggering audible and visual alarms or emergency shutdowns when pressure is abnormal (too high or too low).
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Fluid Transport Systems In water treatment, oil, and chemical pipelines, controlling the automatic start and stop of pumps to prevent pipeline ruptures or cavitation.
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Refrigeration & Air Conditioning Systems Monitoring refrigerant pressure to achieve automatic system regulation and protection.
Frequently Asked Questions
Q What materials are used in the construction of this pressure gauge?
The case, ring (cover), connection, element (Bourdon tube), and movement are all made of stainless steel. The pointer is aluminum alloy with a black finish, and the dial plate is white aluminum with black graduations. The window is glass.
Q What is the thread specification and connection location for this gauge?
The gauge uses a 1/2" BSP thread and features a lower connection location, making it suitable for standard bottom-mount installations in most industrial setups.
Q Can the pressure limit settings be adjusted without opening the casing?
Yes. The upper and lower pressure limit settings can be easily adjusted via the setting pointer directly on the dial face, with no need to open the casing. This makes configuration safe and convenient during operation.
Q What voltage and current ratings do the electrical contacts support?
The electrical contacts typically support AC 220V/380V with a current rating of 3A–5A. This allows them to directly drive small and medium-sized relays or contactors without additional signal amplification.
Q How long is the expected service life of the electrical contacts?
The contacts are designed for durability, with a typical service life exceeding 100,000 switching cycles. This robust construction significantly reduces maintenance frequency and replacement costs.
Q Is this pressure gauge suitable for use in refrigeration and HVAC systems?
Yes. This gauge is well-suited for refrigeration and air conditioning systems. It monitors refrigerant pressure and can trigger automatic system regulation or protective shutdowns, helping maintain safe and efficient operation.

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