M55629/1-393 is a product by Sensata Technologies, a leading global provider of sensing, electrical protection, control and power management solutions. It is a 2.5A/45VDC Speed Sensor designed for easy installation and provides features such as vibration protection, high accuracy, and adjustable speed range. The product is suitable for a variety of applications including automotive, agricultural and industrial. It has a temperature range between -40°C and +105°C and an operating humidity range between 95% RH and 5% RH, making it suitable for use in a wide range of environments. The product includes a number of additional features such as LED diagnostics, a self-test function, and a selection of current measurement options.