Murphy EGS21 P-400-24-B is an electromechanical relay instrument. It is designed for pressure measurement with a range of up to 400 psi (2.76 MPa / 27.60 bar).
Powered by a 24V DC system, its output is a Hall-effect switch capable of outputting ground signals and triggering in a decreasing manner, making it particularly suitable for pressure gauges.
The instrument features an SAE-type low-treated stainless steel bezel and an impact-resistant, waterproof polyester (PBT) housing. With a wide operating temperature range from -40°C to +85°C, it operates stably.
It also has overvoltage and reverse polarity protection, complies with SAE J1810 standards, and can be widely used in various industrial pressure monitoring scenarios.