Differential Pressure Manometers

Know More About Triplett Pressure Meters and Manometers

What is Measuring Pressure?

Pressure, in industry, is a process of pushing or pressing material through a certain conduit. Pipes, hoses, pumps, and cylinders are filled (or emptied) of such materials as water, oil (hydraulics), air (pneumatics), and gases. The pressure of gases and liquids in pipes and cylinders must be monitored and controlled for safety and operational reasons. Pressure meters that measure differential pressure are known as Manometers.

What are the units of measure for Pressure Meters and Manometers?

Units of measure include: Pounds per square inch (psi), inches of water (both common in the U.S) and millimeters of mercury (mm Hg) - a popular metric unit. Other supported units of measure include Bars and Pascals.

What are the different types of manometers?

There are several types of manometers, each of which is designed for a specific purpose. Some of the most common types of manometers include:

• Differential Pressure Manometers: Differential pressure manometers are devices commonly used to measure the pressure difference between two points. They are largely chosen for HVAC applications to measure the pressure drop across air filters, or to get the difference in pressure between the supply and return ducts. These types of manometers can also be used to measure the pressure difference between the inside and outside of a pressure vessel, or between two different fluids. Additionally, these meters are used in manufacturing, and chemical processing to measure the pressure difference between two points in a system, along with monitoring process conditions, control pressure, and troubleshoot process issues.
• Single Pressure Manometers: These digital manometers are designed to measure positive, negative, or differential pressures.

How do differential pressure manometers work?

The differential pressure manometer offers a simple, reliable method to measure the pressure in a system. Using this device, it is possible to determine the pressure difference between two points, as the pressure of a fluid is directly proportional to its column height. By comparing the heights of two columns of fluid and calculating the difference between them, one can accurately measure the pressures of both points.

What are the features on Manometers and Pressure Meters?

Quick Disconnect fittings: Such fittings are convenient in that they allow for quick and simple connect and disconnect of hoses from and to the meter.

Zero/Offset: This feature offers the user a method of comparing measurements to reference value (off¬set). It also allows the user to null the display for a measurement of a system that does not any have pressure (Zero). The Offset feature also allows the user to better match the display of two separate pressure systems.

Data Hold: The meter’s display can be ‘frozen’ so that the user can retain a measurement long after the pressure has changed if desired.

MIN-MAX-AVG: For long measurement sessions the user can store the highest (MAX), lowest (MIN), and average (AVG) readings for later recall. This is handy when capturing peaks and drops over time.

PC Interface: For surveys and compliance testing, the PC interface is a convenient way to offer time and date stamped documentation of readings.

What are typical Pressure Meter applications?

The applications for pressure and vacuum instrumentation can be divided into two classes: Low range (0-30psi) and High range (0-500psi).

• Low range applications include hospital equipment manufacturing, light duty manufacturing (pick-and¬place robotic automation, fume extractors, dust blowers), and light duty controls (gates, avionics).
• Higher range applications include heavy construction, cargo lifts, and commuter/standard rail controls.

Applications of Differential Pressure Manometers

The primary purpose of a differential pressure manometer is to measure and monitor pressure variations in systems where a pressure difference is important. Here are some common applications of a differential pressure manometer:

• HVAC Systems: Differential pressure manometers are widely used in HVAC) systems. to measure the pressure difference across filters, air ducts, and fans, providing valuable information about the system's efficiency and airflow.
• Cleanrooms and Laboratories: Differential pressure manometers are used to measure and monitor the pressure differences between different areas, ensuring the desired airflows and preventing contamination in controlled environments such as cleanrooms and laboratories.
• Industrial Process Control: Differential pressure manometers are used to monitor the pressure drop across filters, measure flow rates, and control pressure imbalances in pipelines. They assist in maintaining process efficiency and ensuring the safety of the equipment and operators.
• Environmental Monitoring: Differential pressure manometers help identify pressure differentials that may indicate leaks or inadequate ventilation, ensuring the safety of personnel and compliance with environmental regulations.
• Medical Equipment: Differential pressure manometers are used in respiratory equipment, anesthesia machines, and isolation chambers to monitor and control the pressure differences that affect patient safety and comfort.

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