Some of the features are listed below:

• independent transmitter and receiver - any transmitter can be re-coded with any receiver
• the apollo monitor can be re-coded if you change your tank
• no antenna wires protruding from the ultrasonic sender
• no probe - no powertube necessary
• proven long life lithium battery
• totally sealed unit
• meets EC EMC regulations
• extra safe - energy limited transmitter power source
• universal - one fits all - suitable for old and new tanks, both plastic and steel
• easy to install, no drilling, no cutting of tubes
• fits to 20mm diameter hole, 32mm diameter hole, or using the adapter fits standard 38mm (1.5") gauge socket
• simple multi-switch setting for tank size setup
• simple retro fitting
• suitable for tanks of heights up to 3 metres
• early warning indicator and the more visible red flashing almost out indicator
• transmitting distance of up to 200 metres
• suitable for use in tanks for the storage of diesel fuel, kerosene, gas oil types A2, C1 and D as defined by BS2869