The choice between a liquid filled gauge and a dry gauge will depend on the specific requirements of the application.
Why Select a Liquid Filled Pressure Gauge?
There are several reasons why a liquid filled gauge might be preferred over a dry gauge:
Dampening effect: The liquid in the gauge helps to dampen the movement of the pointer, which can make the readings more stable and easier to read.
Vibration resistance: The liquid can help to protect the gauge from damage caused by vibration, making it more durable.
Accuracy: The liquid can help to reduce the effects of temperature changes on the gauge, which can improve its accuracy.
Safety: In some cases, a liquid filled gauge may be required for safety reasons, such as when the pressure being measured is very high. The liquid can help to prevent the gauge from bursting in the event of an overpressure.
Aesthetics: Some people simply prefer the look of a liquid filled gauge to a dry gauge.
Why Select a Dry Pressure Gauge?
There are several reasons why a dry pressure gauge might be preferred over a liquid filled gauge:
Cost: Dry pressure gauges are generally less expensive than liquid filled gauges.
Weight: Dry gauges are usually lighter in weight than liquid filled gauges, which can be an important consideration in some applications.
Ease of installation: Dry gauges are easier to install than liquid filled gauges, as they do not require any special filling or sealing procedures.
Maintenance: Dry gauges generally require less maintenance than liquid filled gauges, as there is no need to check or replace the filling liquid.
Chemical compatibility: In some cases, the filling liquid used in a liquid filled gauge may not be compatible with the process fluid being measured. In these cases, a dry gauge may be the only option.
Temperature range: Some dry gauges are designed to operate over a wider temperature range than liquid filled gauges.