Simply connect MK4 peristaltic pump to a
permanent mains supply, fit the sensor to the air
conditioner drip tray and connect to the drip tray
using the vinyl tube supplied. The MK 4 Pump can
be mounted remotely, as it is self-priming to a
height of 3 metres (9.8ft), and will pump 6.25 litres (1.65 US gallons) of water per hour against a maximum head of 12 metres (40ft).

Unlike other pumps using either mechanical or electrical conductivity sensors, the MK 4 does not suffer from corrosion or contamination problems.
The water level detector has two sensors within
the head which warm up to 15°C above ambient.
When the lower sensor comes into contact with
water, the heat conductivity from the sensor
provides a temperature difference setting the
pump into motion.

The pump will only turn off when the water level
has reduced below the lower sensor and any
moisture on the sensor has evaporated.
The mk 4 operates in dirty water.