OEM 100mm Stainless Steel Mechanical Pressure Gauge – China Suppliers & Factory for Low-Pressure Measurement Manufacturers, Factories

Introducing our China-made low-pressure diaphragm all-stainless steel pressure gauge, a precision instrument meticulously designed for accurate measurement of low-pressure, micro-pressure, and negative-pressure (vacuum) media, This high-quality pressure gauge features a corrugated diaphragm as its core elastic sensing element, ensuring reliable performance even in challenging conditions. Crafted entirely from stainless steel, it is ideal for measuring the pressure or vacuum of low-pressure gases and liquids that can be corrosive to copper alloys and standard carbon steel. Additionally, it effectively handles non-solidifying and non-crystallizing substances, making it a versatile choice for various applications, As pressure from the measured medium acts on the stainless steel corrugated diaphragm, it undergoes elastic deformation. This deformation is then amplified and converted via an internal transmission mechanism, comprising a linkage and gear system, which drives a pointer to rotate on the dial for a clear visual indication of the pressure value. In the case of negative pressure, the diaphragm compresses, and the pointer indicates in the opposite direction, As a leading factory and supplier in China, we guarantee top-notch performance and durability with our stainless steel pressure gauges, making them a perfect choice for industries seeking reliable pressure measurement solutions

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

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).
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.
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

1
Ventilation and Air Conditioning Systems: Measuring positive and negative pressure in ductwork and differential pressure on filters.
2
Environmental Protection and Flue Gas Treatment: Monitoring micro-pressure or negative pressure in dust collectors, desulfurization towers, and combustion furnaces.
3
Gas Transportation and Piping: Monitoring low-pressure pipeline pressures for gases such as natural gas, biogas, and compressed air.
4
Medical and Laboratory Equipment: Pressure monitoring in sterilizers, biochemical incubators, and gas supply systems.
5
Industrial Process Control: Measuring micro-positive pressure or vacuum in reaction vessels and fermenters in the chemical, pharmaceutical, and food and beverage industries.
6
Fire Protection and Building Automation: Pressure monitoring of positive pressure ventilation and smoke exhaust systems.

Frequently Asked Questions (FAQ)

Q What is the connection thread standard for this pressure gauge?
This pressure gauge uses a 1/2" NPT thread with a lower connection location, making it compatible with standard NPT piping systems commonly used in industrial and commercial applications.
Q What pressure ranges can this gauge accurately measure?
Thanks to its corrugated diaphragm sensing element, this gauge is particularly effective in low-pressure ranges from 0~40 kPa, and can even measure as low as 0~1 kPa with high sensitivity and accuracy.
Q Is this pressure gauge suitable for corrosive media?
Yes. It is compatible with 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 are recommended to prevent clogging.
Q What materials are used in the construction of this gauge?
The case, ring, connection, Bourdon tube element, and movement are all made of stainless steel, ensuring durability and corrosion resistance. The dial plate is white aluminum with black graduations, and the pointer is black-finished aluminum alloy.
Q Can this gauge be used in HVAC and building automation systems?
Absolutely. This gauge is well-suited for ventilation and air conditioning systems, including ductwork pressure measurement and filter differential pressure monitoring, as well as fire protection positive pressure ventilation and smoke exhaust system monitoring.
Q What installation connection types are available for this gauge?
The gauge supports multiple connection types including threaded connections, flange connections, and clamp connections, providing installation flexibility to suit a wide range of industrial and commercial piping configurations.

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