Potter switches are electrical devices used in fire protection systems to detect and signal the presence of fire or abnormal conditions. They are designed to monitor specific parameters and activate an alarm or trigger a response when certain conditions are met.

Water flow switches are installed in sprinkler systems and monitor the flow of water. They detect the movement of water through the system and signal the activation of sprinkler heads. Supervisory switches are used to monitor the status of auxiliary systems, such as pressure tanks or valve positions.