A pressure indicator is a device or instrument that is designed to measure, detect or monitor changes in pressure. However, there are other terms that can be used as synonyms for this term. Some of these terms include pressure gauge, pressure sensor, pressure transducer, pressure switch, and pressure meter. Each of these synonyms has its unique features and uses, depending on the context in which they are applied. However, their primary role is to provide an accurate reading of pressure measurements in different systems. With advancements in technology, more advanced pressure indicators are being developed every day, making it easier for engineers and technicians to monitor pressure levels in various applications.