# Difference Between Pressure And Compound Gauge

Gauges play an important role for various equipment used in pharmaceutical industries.Different types of gauges are installed on various equipment or lines and in this article we will discuss what is the  difference between

• Pressure GaugeÂ
• Compound GaugeÂ

Most people are aware of only the pressure gauge and they assume that there is only the pressure gauge that is used to measure all types of the vacuum and pressure but the reality is that there is a difference between pressure and vacuum gauge.

## Pressure Gauge

Pressure gauge is used to measure pressure and it is installed on various lines or equipment where we need to measure the value of pressure.

In this gauge the needle remains at zero at atmospheric pressure and when pressure is applied it moves towards clockwise and gives the value of pressure.

The pressure reading is indicated in positive values.

### Examples

The pressure gauges are commonly installed on the following

• Wash In Place EquipmentÂ
• Compressed Air Supply Lines

## Compound Gauge

Compound gauge or compound pressure gauge is the type of gauge which has the ability to measure both the values of the pressure and vacuum.

In simple words the compound gauge is installed on those equipment where we have to measure the values for both pressure and vacuum.

The vacuum reading is indicated in negative digits.

On the dial of compound gauge the values for both positive and negative digits are printed.

At atmospheric pressure the needle of the gauge remains at zero.

It move clock wise when pressure is applied and gives value in positive digits.

The needle of the compound gauge moves anti clockwise when vacuum is generated and gives values in negative digits.

### Example

Most common example of the equipment where compound gauge is installed is the autoclave.

When pressure is applied in autoclave it is displayed in positive values and when vacuum is generated it gives values in negative.

Image Credit

Image Source – Google | Image By amazon