Advantages of Mc Leod Gauge | disadvantages of Mc Leod Gauge

This page covers advantages and disadvantages of Mc Leod Gauge. It mentions Mc Leod Gauge advantages or benefits and Mc Leod Gauge disadvantages or drawbacks.

The working principle of Mc Leod Gauge is compression of sample of low pressure gas to a level which is sufficiently higher. This pressure can be read using manometer.

Pressure of gas in Mc Leod Gauge can be expressed as follows.
P = ( h2*At ) / (V - At*h) = h2*At/V
h = Height of mercury column in the reference capillary
At = Area of cross section of measuring capillary tube
V = Volume of bulb

Mc Leod Gauge

Benefits or advantages of Mc Leod Gauge

Following are the benefits or advantages of Mc Leod Gauge:
➨The reading of Mc Leod Gauge is not affected by composition of gas whose pressure is to be measured.

Drawbacks or disadvantages of Mc Leod Gauge

Following are the disadvantages of Mc Leod Gauge:
➨They do not provide continuous output.
➨They can not be used in hazardous conditions due to usage of the mercury in the instrument.

Advantages and Disadvantages of other equipments, meters or devices

What is difference between or comparison between

Following links mention difference or comparison between various equipments and terms:
comparison between SPI and I2C
difference between PXI and PCI
Microscope vs Telescope
Amplitude Modulation vs Angle Modulation
difference between modem and router
Air Fuel Ratio Sensor vs O2 Sensor
Radiometer vs Spectrometer vs Spectroradiometer
Clamp meter vs digital multimeter
Colorimeter vs Spectrophotometer
difference between Prism and Grating
difference between Venturi meter and Orifice meter
difference between Lux and Lumens