Manometers

Manometers are pressure measurement instruments that use the height of a liquid column — typically water, oil, or mercury — to indicate pressure or differential pressure directly from first principles. Classic designs include U-tube, well-type, and inclined tube manometers, each suited to different pressure ranges and readability requirements. U-tube manometers are among the most fundamental pressure measurement tools in engineering, widely used in laboratories and field settings where direct, power-independent measurement is preferred.

Inclined tube manometers enhance readability for very low differential pressures by stretching the liquid column along an angled tube, effectively amplifying the scale. Well-type manometers incorporate a fixed large-bore reference chamber that allows single-leg readings without the need to observe both sides of the instrument. All liquid column manometers operate without electricity, making them inherently reliable reference instruments.

Typical Applications

HVAC duct static pressure and airflow measurement in commercial building systems
Laboratory reference measurements and calibration of low-range pressure instruments
Filter differential pressure monitoring in ventilation and cleanroom systems
Combustion appliance gas pressure testing and burner adjustment
Backflow prevention device testing in potable water distribution systems
Educational and training environments demonstrating fluid pressure fundamentals

Popular Brands

Meriam is a well-established manufacturer of U-tube and well-type manometers used in industrial and laboratory environments, known for precision and durability. Dwyer Instruments offers a comprehensive range of inclined tube manometers, combination inclined-vertical gauges, and specialty manometers for HVAC commissioning and process applications.