Manometer
| Formula / Notation | P = ρgh (hydrostatic); manometer measures pressure differential |
|---|---|
| Also Known As | Pressure gauge, U-tube manometer, differential pressure gauge, sphygmomanometer (blood pressure) |
What is Manometer?
A device used to measure the pressure of a gas or liquid. Open-arm manometers measure gauge pressure relative to atmospheric pressure; closed-arm manometers measure absolute pressure. Mercury manometers use the height of a mercury column to indicate pressure.
Formula & Notation
Other Names / Synonyms: Pressure gauge, U-tube manometer, differential pressure gauge, sphygmomanometer (blood pressure)
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
A device used to measure the pressure of a gas or liquid. Open-arm manometers measure gauge pressure relative to atmospheric pressure; closed-arm manometers measure absolute pressure. Mercury manometers use the height of a mercury column to indicate pressure.
Manometers are used to measure: vacuum system pressures (during distillations, evacuations), pressures in gas reaction systems, blood pressure (sphygmomanometer), tire pressure, atmospheric pressure monitoring, and differential pressures across flow meters and filters in process equipment.
Mercury manometers contain toxic liquid mercury — mercury spills from broken manometers are a serious clean-up and health hazard (inhalation of Hg vapour). Use oil or water manometers, or digital pressure gauges, as safer alternatives. Mercury-free manometers are preferred in all new installations.
The formula or notation for Manometer is: P = ρgh (hydrostatic); manometer measures pressure differential