Baumer Air Differential Pressure Gauge

A. Product Overview
The Baumer BMG air differential pressure gauge is a compact mechanical instrument used for measuring low differential pressure in air and non-corrosive gas applications. It is designed for accurate pressure difference indication in low range applications where reliable visual monitoring is required without external power supply.

This gauge is suitable for measuring air pressure difference across filters, ducts, fans, cleanrooms, ventilation systems and other low pressure gas lines. It comes with a die cast aluminum case and bezel, acrylic window, external zero adjustment by screw and vertical mounting arrangement. The gauge is supplied with high and low pressure taps in 1/8 inch NPT female connection, with one pair on the side and one pair at the back.

The Baumer BMG differential pressure gauge offers accuracy of plus or minus 2.0 percent of full scale, plus or minus 3.0 percent for 0 to 125 Pa and plus or minus 4.0 percent for ranges 10 mmWC and below. It is designed for operating temperature from -7 to 60 degree C and pressure limit from -0.67 to 1 bar. The gauge is suitable for over pressure up to 25 psig.

B. Working Principle
The Baumer BMG differential pressure gauge works by comparing pressure from two separate points: the high pressure side and the low pressure side. These two pressure inputs are connected to the gauge through the 1/8 inch NPT female pressure taps.

When pressure difference is created between the high and low pressure ports, the internal sensing element moves in proportion to the differential pressure. This movement is transferred to the pointer mechanism, which displays the pressure difference on the dial. Since the gauge uses a mechanical measuring principle, it does not require electrical power for normal pressure indication.

The external zero adjustment screw allows the user to correct the pointer position before operation, helping maintain accurate readings during installation and routine use.

C. Why It Is Used
The Baumer BMG air differential pressure gauge is used to monitor very low pressure differences in air and non-corrosive gas systems. It helps users identify pressure drop, airflow restriction, filter choking, room pressure imbalance and ventilation performance.

It is commonly used in HVAC systems to monitor air filter condition. When the filter starts getting blocked, the pressure difference increases, allowing maintenance teams to replace or clean the filter at the right time. In cleanrooms and controlled environments, it helps monitor room pressure difference to maintain contamination control and airflow direction.

This gauge is preferred because it is compact, lightweight, easy to install and suitable for continuous visual indication. Its mechanical design makes it useful in applications where simple and reliable pressure monitoring is required without complex wiring or power supply.

D. Suitable Buyers
This Baumer BMG differential pressure gauge is suitable for HVAC contractors, cleanroom contractors, pharmaceutical companies, hospitals, laboratories, air handling unit manufacturers, filter manufacturers, ventilation system suppliers, industrial maintenance teams, facility management companies, system integrators and OEM machine manufacturers.

It is also suitable for buyers working in pharma plants, food processing units, hospitals, cleanrooms, laboratories, commercial buildings, air filtration systems, paint booths, dust collection systems and industrial ventilation systems.

FAQ

1. What is the Baumer BMG differential pressure gauge used for?
The Baumer BMG differential pressure gauge is used for low pressure measurement of air and non-corrosive gases. It is commonly used for filter monitoring, HVAC systems, cleanroom pressure monitoring, duct pressure measurement and ventilation applications.

2. Can this gauge be used for corrosive gases?
No. This model is suitable for air and non-corrosive gases only. For corrosive gases, a gauge with compatible wetted parts should be selected.

3. Does the Baumer BMG gauge require power supply?
No. It is a mechanical differential pressure gauge and does not require external power supply for pressure indication.

4. What is the accuracy of the Baumer BMG air differential pressure gauge?
The accuracy is plus or minus 2.0 percent of full scale, plus or minus 3.0 percent for 0 to 125 Pa and plus or minus 4.0 percent for ranges 10 mmWC and below.

5. What is the temperature limit of this gauge?
The operating temperature limit is -7 to 60 degree C.

6. What is the pressure limit of the Baumer BMG gauge?
The pressure limit is from -0.67 to 1 bar, and the gauge is suitable for over pressure up to 25 psig.

7. What process connection is available in this model?
The gauge has 1/8 inch NPT female high and low pressure taps, with one pair on the side and one pair at the back.

8. Is zero adjustment available in this gauge?
Yes. The gauge has external zero adjustment by screw for easy pointer correction during installation and operation.

9. What accessories are supplied with the gauge?
Standard accessories include two 1/8 inch NPT plugs, two pipe thread to rubber tubing adaptors and three flush mounting adaptors with screws.

10. Where can this gauge be installed?
It can be installed in HVAC systems, cleanrooms, air handling units, filter monitoring panels, ventilation ducts, laboratory rooms, pharmaceutical plants and other low pressure air and gas applications.