The following characterized the QUINTOC controller QOS 2:
  Small design, useable in Zone 2 and 22
  Enclosure 120 mm x 122mm x 90 mm
  5 different flushing programs
  Maintenance free system
  Digital magnetic valve with replaceable fuse
  Programmable key switch function with alarm indication
  Programmable alarm relay
  Unblocking relay with 5 A switching load
  Approved according to EN 60079-2
  Ambient temperature range -20°C up to 60°C
  Mountable within or outside the cabinet
  3 free programmable temperature sensors
  Temperature value 1 activates the flushing (for cooling down)
  Temperature value 2 activates the alarm
  Temperature value 3 shut down the system
  Alarm indication for sensor broken

The system build up contains:

Controller
Pressure reducer
Digital valve
Flushing outlet

If the controller is installed inside the cabinet the installationset Monset1 is need