HRM-300-124S

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HRM-300-124S application field and working principle

HRM-300-124S is a high-performance pressure sensor developed by Hiller. This sensor has a wide range of applications, including vehicle engine system, industrial pressure control system, HVAC system, hydraulics, medical applications, and aerospace design. The device uses a capacitive-based measurement principle to provide accurate and reliable pressure readings. The HRM-300-124S is capable of measuring pressures up to 300 PSI and can be installed in environments that have temperatures as low as -40°F and as high as +212°F.

The pressure sensor utilizes a ceramic capacitive sensing element, which is an electrical device that is sensitive to pressure and increases its output signal when there is an increase in pressure. The ceramic element changes its capacitance as the pressure is changed, and this change is proportional to the pressure difference between the two ports of the element. The change in capacitance is then measured using a Wheatstone bridge technique. A Wheatstone bridge is an electrical circuit used to measure an unknown impedance, which in this case is the capacitance of the sensing element.

The Wheatstone bridge circuit consists of two resistors and a capacitor which form a closed loop when the circuit is completed. As the pressure increases, the capacitance increases, altering the overall balance of the circuit. The bridge circuit then sends a signal to the associated electronic pressure indicator. The amplitude of the signal depends on the pressure, with the magnitude of the signal linearly increasing with the increase in pressure. The device is also equipped with two pressure ports, which allow for pressure compensation.

The HRM-300-124S is designed to provide reliable measurements in a wide range of applications, and is equipped with a variety of features and options that allow it to be used in different applications. It can be ordered with a digital or analog output, an integrated indicator, and stainless steel fittings. It also has a variety of temperature compensation options, including a temperature compensation factor and a thermistor compensation.

In conclusion, the HRM-300-124S is a robust and reliable pressure measuring device which has a wide range of applications. It utilizes a ceramic capacitive sensing element and Wheatstone bridge circuit to provide accurate pressure readings, and features a variety of options which allow it to be used in different applications. It is a useful tool for any application where accurate pressure measurements are required.

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