OEM 100mm Mechanical Pressure Gauge from China Suppliers – All-Stainless Steel Factory Instrument for Low-Pressure Measurement Suppliers, Factories

Introducing our low-pressure diaphragm all-stainless steel pressure gauge, a high-precision instrument tailored for measuring low-pressure, micro-pressure, and negative-pressure (vacuum) media. Manufactured in China, this device is ideal for suppliers seeking reliable and durable instruments for demanding applications, Engineered with a corrugated diaphragm as its core elastic sensing element, our pressure gauge features a robust casing and essential components made entirely from stainless steel. This design is specifically intended for measuring the pressure or vacuum of low-pressure gases and liquids that are corrosive to copper alloys and conventional carbon steel, ensuring longevity and reliability, When the measured medium exerts pressure on the stainless steel corrugated diaphragm, the resulting elastic deformation is amplified through an intricate internal transmission mechanism, combining linkage and gear mechanisms. This process ultimately drives a pointer to rotate on the dial, providing a clear visual indication of the pressure value. In cases of negative pressure, the diaphragm compresses, and the pointer shifts in the opposite direction, allowing for precise readings, Choose our stainless steel pressure gauge for superior performance and accuracy in your low-pressure measurement needs. As a trusted factory and supplier in China, we are committed to delivering quality products that meet the highest industry standards

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" NPT
Element (Bourdon Tube) Stainless steel
Movement Stainless steel
Dial Plate White Aluminum with Black Graduations
Core Characteristics and Advantages
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High Sensitivity and Accurate Measurement
Compared to Bourdon tubes, corrugated diaphragms exhibit greater deformation in low-pressure ranges, making them extremely sensitive to minute pressure changes. They are particularly suitable for measuring pressure ranges of 0~40 kPa, or even lower (e.g., 0~1 kPa).
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Wide Media Compatibility
Suitable for most non-strong oxidizing, non-solidifying, and non-crystallizing corrosive media. For high-viscosity or easily crystallizing media, models with open flanges or diaphragm isolators can be selected to prevent clogging.
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Excellent Sealing Performance and Multiple Connection Options
It offers excellent sealing performance, suitable for applications requiring prevention of media leakage or external environmental intrusion. It provides various interface options including threaded connections, flange connections, and clamp connections, allowing for flexible installation.
Typical Application Fields
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Ventilation and Air Conditioning Systems: Measuring positive and negative pressure in ductwork and differential pressure on filters.
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Environmental Protection and Flue Gas Treatment: Monitoring micro-pressure or negative pressure in dust collectors, desulfurization towers, and combustion furnaces.
Gas Transportation and Piping: Monitoring low-pressure pipeline pressures for gases such as natural gas, biogas, and compressed air.
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Medical and Laboratory Equipment: Pressure monitoring in sterilizers, biochemical incubators, and gas supply systems.
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Industrial Process Control: Measuring micro-positive pressure or vacuum in reaction vessels and fermenters in the chemical, pharmaceutical, and food and beverage industries.
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Fire Protection and Building Automation: Pressure monitoring of positive pressure ventilation and smoke exhaust systems.
Frequently Asked Questions (FAQ)
Q What is the pressure measurement range of this gauge?
This gauge is specifically designed for low-pressure measurement, with a typical range of 0~40 kPa. It can also accommodate even lower pressure ranges such as 0~1 kPa, making it ideal for applications that require high sensitivity to minute pressure changes.
Q What materials are used in the construction of this pressure gauge?
The case, ring (cover), connection, Bourdon tube element, and movement are all made of stainless steel. The window is glass, the pointer is black-finished aluminum alloy, and the dial plate is white aluminum with black graduations — ensuring durability and corrosion resistance.
Q What types of media is this gauge compatible with?
This gauge is compatible with most non-strong oxidizing, non-solidifying, and non-crystallizing corrosive media. For high-viscosity or easily crystallizing media, models equipped with open flanges or diaphragm isolators are available to prevent clogging and ensure reliable operation.
Q What connection types and sizes does this gauge support?
The gauge features a lower connection location with a 1/2" NPT thread as the standard configuration. It also supports multiple interface options including threaded connections, flange connections, and clamp connections, providing flexibility for various installation requirements.
Q Is this gauge suitable for use in HVAC and building automation systems?
Yes. This gauge is well-suited for ventilation and air conditioning systems, including measuring positive and negative pressure in ductwork and differential pressure across filters. It is also applicable for fire protection systems, positive pressure ventilation, and smoke exhaust pressure monitoring.
Q Can this gauge be used in medical or laboratory environments?
Yes. Thanks to its high sensitivity, excellent sealing performance, and stainless steel construction, this gauge is suitable for medical and laboratory applications including sterilizers, biochemical incubators, and gas supply systems where precise and reliable pressure monitoring is essential.

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