R.STAHL TRANSMITTER SUPPLY UNIT SERIES 8510 The R. STAHL Series 8510 transmitter supply unit is part of an isolator system for process automation and the connection of all types of sensors, actuators and transmitters. It is fitted in Ex e enclosures using an anti-vibration screw connection, easily accessible terminals simplify installation and ensure safe connections. Isolator system for process automation Connection of all types of sensors, actuators and transmitters Simple and safe installation