The Crouzet Control part 81513552 is a base-mounted pressure switch with a convenient manual override feature. This reliable switch is designed to accurately detect pressure changes in various applications. It can be easily installed and provides precise control over pressure levels. The manual override allows for quick and easy adjustments, giving users more flexibility and control. With its durable construction and user-friendly design, this pressure switch is the ideal choice for a wide range of industrial and commercial settings.