CE Certification China Suppliers Factory - 0.6 MPa Explosion-Proof Electric Contact Diaphragm Seal Pressure Gauge Manufacturer, Factory

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Introducing our precision pressure gauge, a high-quality mechanical instrument meticulously engineered for the accurate measurement and local indication of fluid or gas pressure in various industrial, commercial, and process applications. Manufactured in China by trusted suppliers, our pressure gauge is built with sturdy materials such as stainless steel or brass, ensuring long-lasting reliability even under extreme operating conditions like high vibrations, temperature fluctuations, and corrosive environments.

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Equipped with a Bourdon tube sensing element, this gauge effectively converts pressure into mechanical displacement, which is clearly displayed through a calibrated dial and pointer. Available in multiple dial sizes, pressure ranges, and connection types, our pressure gauge can be customized to cater to diverse system requirements.

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Widely utilized in sectors like oil & gas, chemical processing, water treatment, HVAC, power generation, and manufacturing, our pressure gauge also offers optional features including glycerin or silicone fluid filling for damping, overpressure protection, adjustable zero mechanisms, and compliance with international standards (such as EN 837 and ASME B40.100).

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Designed for effortless installation and maintenance, this pressure gauge ensures stable performance, excellent readability, and an extended service life, making it an invaluable component for safe and efficient system monitoring. Choose our factory-manufactured pressure gauge to enhance your operational efficiency today!

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Product Description

Product Specifications
Case Aluminum
Size 100mm (4")
Ring (Cover) Aluminum
Window Glass
Pointer Aluminum Alloy, Black Finished
Connection Stainless Steel
Connection Location Lower, Center Back, Lower Back
Thread 1/8", 1/4", 3/8", 1/2"; PT (BSPT, ZG), BSP (G, PF), NPT etc.
Element (Bourdon Tube) Stainless Steel
Movement Stainless Steel
Dial Plate White Aluminum with Black Graduations
Core Features and Advantages
Comprehensive Media Isolation and Protection Through an isolation diaphragm and sealing fluid, the measured medium is completely isolated from the instrument's internal pressure-sensing elements and electrical contact mechanism. It can withstand corrosion and clogging from strong acids, strong alkalis, high-viscosity slurries, media containing solid particles, and easily crystallizing media, solving the pain points of ordinary electrical contact pressure gauges being easily damaged and having short lifespans in corrosive media.
Automated Monitoring The built-in electrical contact control mechanism supports freely set upper and lower pressure limits. When the measured pressure reaches the set threshold, the electrical contacts automatically switch, outputting a switch signal. This signal can be directly linked with relays, PLCs, alarms, and other devices to achieve closed-loop control such as automatic alarm for pressure exceeding limits and pump/valve start/stop.
Stable and Interference-Resistant Measurement The diaphragm seal structure combined with the filling fluid buffers the impact of pressure fluctuations and external vibrations on the pressure measuring element, while ensuring the accuracy and stability of pressure measurement and reliable readings.
Flexible Installation Adaptability Supports multiple installation interfaces such as flange, threaded, and sanitary clamp types to match the connection requirements of different devices.
Typical Application Fields
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Chemical Industry Pressure monitoring and safety control of acids, alkalis, slurries, and high-temperature media.
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Petroleum Industry Pressure interlocking of crude oil, sulfur-containing media, and oil and gas pipelines.
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Pharmaceuticals & Food Pressure measurement and control of sterile media under sanitary conditions.
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Metallurgy & Power Pressure monitoring of high-temperature melts, boiler feedwater, and desulfurization systems.
Frequently Asked Questions
What makes this diaphragm seal pressure gauge suitable for corrosive media?
The gauge uses an isolation diaphragm combined with sealing fluid to completely separate the measured medium from the internal pressure-sensing elements and electrical contact mechanism. This design effectively resists corrosion from strong acids, strong alkalis, high-viscosity slurries, and media containing solid particles, significantly extending service life compared to standard electrical contact pressure gauges.
What thread and connection types are available?
The gauge supports a wide range of thread standards including 1/8", 1/4", 3/8", and 1/2" sizes in PT (BSPT, ZG), BSP (G, PF), and NPT formats. Connection locations include lower, center back, and lower back, and the unit also supports flange, threaded, and sanitary clamp installation interfaces.
How does the automated monitoring and alarm function work?
The built-in electrical contact mechanism allows users to freely set upper and lower pressure limit thresholds. When the measured pressure reaches a set threshold, the electrical contacts automatically switch and output a signal. This signal can be integrated with relays, PLCs, or alarm systems to achieve automatic alerts and control actions such as pump or valve start/stop.
What is the gauge case and dial plate made of?
The case and ring (cover) are made of aluminum, while the dial plate is white aluminum with black graduations for clear readability. The pointer is aluminum alloy with a black finish. Internal components including the Bourdon tube, movement, and connection are all constructed from stainless steel for durability and corrosion resistance.
Is this gauge suitable for food and pharmaceutical applications?
Yes. The diaphragm seal design ensures that the measuring medium does not contact the internal mechanical parts, making it ideal for sterile and hygienic environments. It supports sanitary clamp connection types commonly required in pharmaceutical and food processing industries.
How does the gauge maintain measurement accuracy under vibration or pressure fluctuations?
The diaphragm seal structure combined with filling fluid acts as a buffer, dampening the effects of pressure fluctuations and external mechanical vibrations on the internal pressure-sensing element. This ensures stable, accurate, and reliable pressure readings even in demanding industrial environments.

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