OEM Electric Contact Diaphragm Seal Pressure Gauge 0.6 MPa - China Suppliers Factory, Explosion-Proof Design Manufacturer, Manufacturers

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Introducing our precision pressure gauge, a top-quality mechanical instrument specifically engineered for accurate fluid and gas pressure measurement in various industrial and commercial applications. Manufactured in China using durable materials like stainless steel and brass, our pressure gauges are designed for long-term reliability, even in harsh operating conditions such as high vibration, extreme temperature variations, and corrosive environments. The Bourdon tube sensing element effectively converts pressure into mechanical displacement, which is easily read on a calibrated dial and pointer.

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Our pressure gauges are available in a range of dial sizes, pressure ranges, and connection types, allowing for customization to suit diverse system requirements. They are widely utilized across multiple sectors, including oil & gas, chemical processing, water treatment, HVAC, power generation, and manufacturing. As a leading supplier, we offer optional features such as glycerin or silicone fluid filling for damping, overpressure protection, adjustable zero mechanisms, and compliance with international standards like EN 837 and ASME B40.100.

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Designed with easy installation and maintenance in mind, our pressure gauge ensures stable performance, excellent readability, and an extended service life. This makes it an essential component for safe and efficient system monitoring, affirming our commitment as a reliable factory in the pressure measurement industry.

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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.
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 & Petrochemical Industry Pressure interlocking of crude oil, sulfur-containing media, and oil and gas pipelines.
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Pharmaceuticals & Food Industry Pressure measurement and control of sterile media under sanitary conditions.
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Metallurgy & Power Industry Pressure monitoring of high-temperature melts, boiler feedwater, and desulfurization/denitrification systems.
Frequently Asked Questions (FAQ)
Q What makes this diaphragm seal electrical contact pressure gauge suitable for corrosive media?
The gauge uses an isolation diaphragm and sealing fluid to completely separate the measured medium from the internal pressure-sensing elements and electrical contact mechanism. This design effectively resists strong acids, strong alkalis, high-viscosity slurries, solid-particle-containing media, and easily crystallizing media, significantly extending the service life compared to standard electrical contact pressure gauges.
Q What thread standards and connection sizes are available?
The gauge supports a wide range of thread standards including PT (BSPT, ZG), BSP (G, PF), and NPT, with available sizes of 1/8", 1/4", 3/8", and 1/2". Connection locations include Lower, Center Back, and Lower Back to suit various installation requirements.
Q 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 limit, the electrical contacts automatically switch and output a signal. This signal integrates directly with relays, PLCs, alarms, and control valves to enable automatic over-pressure alarms and pump/valve start-stop control.
Q What installation interface types does this gauge support?
This gauge supports multiple installation interface types, including flange, threaded, and sanitary clamp connections. This flexibility allows it to match the connection requirements of a wide variety of industrial equipment and pipelines across different industries.
Q Is this gauge suitable for use in the pharmaceutical and food industries?
Yes. The gauge supports sanitary clamp connection types and is designed for pressure measurement and control of sterile media under hygienic conditions. Its isolation structure prevents contamination of the process media, making it compliant with the strict cleanliness requirements of pharmaceutical and food processing environments.
Q How does the diaphragm seal structure improve measurement stability?
The diaphragm seal structure, combined with the internal filling fluid, acts as a buffer against pressure fluctuations and external mechanical vibrations. This dampening effect protects the pressure-sensing element from sudden shocks, ensuring consistently accurate and stable readings even in demanding industrial environments.

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