CE Certification Electric Contact Diaphragm Seal Pressure Gauge 0.6 MPa - Explosion-Proof, Reliable China Suppliers and Factory Supplier, Factories

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The pressure gauge is a high-precision mechanical instrument specifically designed for accurate measurement and local indication of fluid or gas pressure in various industrial, commercial, and process applications. Engineered from durable materials like stainless steel or brass, this gauge ensures long-lasting reliability even under challenging conditions, including high vibrations, temperature variations, and corrosive environments. Utilizing a Bourdon tube sensing element, it efficiently converts pressure into mechanical displacement, which is displayed clearly on a calibrated dial and pointer.

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Our pressure gauges are available from trusted China suppliers and manufacturers, offering a wide range of dial sizes, pressure ranges, and connection types to cater to diverse system requirements. These instruments are extensively used in industries such as oil & gas, chemical processing, water treatment, HVAC, power generation, and manufacturing. Optional features include glycerin or silicone fluid filling for damping, overpressure protection, adjustable zero mechanisms, and full compliance with international standards such as EN 837 and ASME B40.100.

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Designed for straightforward installation and maintenance, the pressure gauge delivers stable performance, excellent readability, and an extended service life, making it an indispensable component for safe and efficient system monitoring in various applications.

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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

πŸ›‘οΈ 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.
βš™οΈ 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.
πŸ“Š 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 β€” delivering accurate and reliable readings at all times.
πŸ”§ 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

  • πŸ§ͺ Chemical Industry Pressure monitoring and safety control of acids, alkalis, slurries, and high-temperature media.
  • πŸ›’οΈ Petroleum & Petrochemical Industry Pressure interlocking of crude oil, sulfur-containing media, and oil and gas pipelines.
  • πŸ’Š Pharmaceuticals & Food Industry Pressure measurement and control of sterile media under sanitary conditions.
  • 🏭 Metallurgy & Power Industry Pressure monitoring of high-temperature melts, boiler feedwater, and desulfurization/denitrification systems.

Frequently Asked Questions (FAQ)

Q What makes this pressure gauge suitable for corrosive media applications?
This gauge features an isolation diaphragm and sealing fluid that completely separates the corrosive medium from the internal pressure-sensing elements and electrical contact mechanism. This design allows it to handle strong acids, strong alkalis, high-viscosity slurries, and media containing solid particles without risk of damage or clogging β€” significantly extending the service life compared to standard gauges.
Q Can the pressure alarm thresholds be adjusted on-site?
Yes. The built-in electrical contact control mechanism allows operators to freely set both upper and lower pressure limit thresholds. Once the measured pressure reaches a set value, the electrical contacts automatically switch to trigger alarms or control signals without requiring any external programming.
Q What control devices can the electrical contact signal be connected to?
The switch signal output from the electrical contacts is compatible with a wide range of control devices, including relays, PLCs, audible/visual alarm systems, solenoid valves, and pump control units. This allows seamless integration into automated process control and safety interlock systems.
Q What connection types and thread standards are available?
The gauge supports multiple connection locations including lower, center back, and lower back mounting positions. Available thread standards include 1/8", 1/4", 3/8", and 1/2" in PT (BSPT/ZG), BSP (G/PF), and NPT formats, making it compatible with a wide variety of piping systems worldwide.
Q How does the diaphragm seal structure improve measurement accuracy in vibrating environments?
The diaphragm seal structure, combined with the internal filling fluid, acts as a dampening buffer that absorbs the impact of pressure fluctuations and external mechanical vibrations before they reach the pressure sensing element. This ensures stable pointer movement and accurate readings even in harsh industrial environments with significant vibration or pulsation.
Q Is this gauge suitable for use in pharmaceutical or food processing applications?
Yes. The gauge supports sanitary clamp-type installation interfaces in addition to standard flange and threaded connections. This makes it fully compatible with hygienic process requirements in pharmaceutical manufacturing and food processing, where sterile media handling and easy cleaning are essential.

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