Micromanometers measure gas or liquid pressure and can provide other related information. Digital micromanometers are common and can log data, measure velocity, temperature, and humidity. They are used in HVAC, cleanroom certification, and cardiovascular applications.
Pressure gauges are instruments used to measure the pressure of a gas or liquid. A micromanometer is a special type of pressure gauge designed to measure extremely small pressure differences. While their primary function is to measure pressure, micromanometers can also be designed to provide other related information. This data can be measured directly with the instrument itself or calculated by the device based on other measurements it is used to perform.
There are a variety of types of micromanometers, with the digital micromanometer being the most common type. Digital micromanometers use piezoelectric crystals or other sensors to detect pressure changes. When such changes are sensed, they respond with electrical signals proportionate to the pressure changes. These electrical signals are then used to calculate pressure values.
In addition to the ability to measure pressure, a micromanometer can be designed for other purposes as well. It may be able to log data manually or automatically as measurements are taken. Stored data can later be downloaded to a computer for analysis. Some micromanometers can also be used with a Pitot tube to measure velocity and calculate fluid volume flow. Others are also designed for temperature and humidity measurement.
One field where micromanometers are commonly used is heating, ventilation and air conditioning (HVAC). A micro pressure gauge can be used in HVAC design work to properly balance ventilation and occupant loads or to optimize equipment performance and maximize life. It can also be used in troubleshooting and testing, such as for leak testing lines or checking the condition of a filter. Safety assurance and risk mitigation activities may also require the use of a micro pressure gauge in applications such as radon mitigation or combustion safety analysis.
Cleanroom certification, in particular, may require the use of a micromanometer due to the very stringent parameters that need to be verified. A cleanroom is an enclosed environment that meets stringent specifications for temperature, relative humidity, extremely low particulate matter levels, and other environmental conditions. Rigorous checks on pressure differentials may require the use of a micromanometer to monitor pressure due to its ability to measure very small pressure differences.
Another use of micromanometers is in health care or medical research, especially cardiovascular applications. Numerous cardiovascular disorders are related to systemic dysfunctions of blood pressure or blood flow. With the help of a catheter, a micromanometer can be inserted into blood vessels or the heart to measure blood pressure and flow at various points. It can be used in developing a diagnosis for a patient or in collecting data for cardiovascular research.
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