A pressure gauge measures the force of a fluid on a surface. It is usually measured as a unit of force per unit of surface area. The process of measuring pressure is complicated, and many techniques have been developed for various applications. Here are a few of the most common types of pressure gauges and their uses. These devices are an essential part of scientific and industrial applications. You can find a pressure gauge in your local hardware store or online.

– Pressure gauges are available in different types and sizes. The type of connection to be used depends on the process and the type of pressure. Usually, the national pipe thread (NPT) connection is used, but some manufacturers make gauges that fit G-type and other types of connections. A male NPT connection is conical, meaning the thread diameter decreases from the tip to the socket. Alternatively, a tapered thread is more precise.

– Chemical seals protect the gauge from being plugged up in viscous service. The chemical seal keeps corrosive or poisonous process materials from contacting the sensor. The chemical seals place a polycarbonate diaphragm between the process and the gauge, and a non-corrosive fluid is used to fill the cavity. High-temperature chemical seals are made of sodium-potassium eutectic. Low-temperature chemical-sealed gauges are made of ethyl alcohol, silicon oil, or toluene.

A chemical seal is an integral part of a เครื่องวัดความดัน. The chemical seal prevents the process fluid from reaching the sensor and causing it to clog. In addition to preventing the process fluid from freezing in a dead-ended chamber, it also provides protection from chemicals. This type of seal protects the gauge from high temperatures. The temperature seal is a critical part of a pressure gauge. If it is exposed to an environment that has wide fluctuations in temperature, it is best to select a gauge that is hermetically sealed and has a polycarbonate lens.

The front of a pressure gauge is a window that protects the internal mechanism. It can be made of glass or tempered glass. Its diaphragm is molded in a single piece and can be accessed at any point to prevent corrosion. In addition to this, it has a polycarbonate lens to protect the sensitive parts of the instrument. It is also important to ensure that the pressure gauge is calibrated with an external source.

To ensure accuracy, the gauge should be calibrated in its working range. To ensure safety and extended gauge life, the pressure gauge should be set to a range that is twice its working pressure. Depending on the type of application, a pressure gauge may have a range of up to 200 psi. The most common pressure gauges are those that have a digital display and an analog display. These gauges are used in industries where the accuracy is important.