Pressure Gauges

Pressure Gauges measure the pressure or differential pressure of a gas or liquid. The category covers mechanical, mechatronic and electronic instruments, together with accessories that protect the instrument or connect it to the process.

A mechanical pressure gauge converts the measurement into pointer movement on a scale without a power source. A mechatronic version combines mechanical measurement with an electrical switching signal. An electronic pressure gauge uses power and converts the measurement into an electrical output, such as 4 to 20 mA, for a PLC or process controller.

Mechanical gauges are used where the value must remain readable locally, including when electricity is unavailable. Mechatronic instruments monitor or control pressure in equipment such as pressure vessels and pipe networks. Electronic instruments supply a signal to a control loop. The category supports gas, liquid and differential-pressure measurement.

First decide whether the application needs a local pointer display, a switching contact or an electrical output signal. Then check the medium, pressure or differential-pressure range and operating conditions. Select suitable accessories such as gauge cocks, pulsation dampers, restrictors, siphons, cooling elements, overpressure protectors and mounting or reducing nipples.

Key attributes are measuring principle, pressure type, medium, measuring range, local or electrical indication, output signal, process connection and protective accessories.

Frequently asked questions

Select a mechanical pressure gauge when the process value must be readable directly at the installation, including when electrical power is unavailable. The instrument measures without a power source and presents the value through a pointer and graduated scale.

Gauge cocks, pulsation dampers, restrictors, overpressure protectors, siphons and cooling elements help protect the instrument against process loads. Sealing rings and mounting or reducing nipples support its connection to the process.