Liquid dispense system

The dispense system uses specialist glass burettes to dispense a measured volumes of reagent into a bottle with a soil sample, 8 samples are processed simultaneously. The dispense system uses a Programmable Logic Controller (PLC) to turn on the pumps to fill the burettes. Once a sensor is triggered the solenoids beneath the burettes open and dispense the liquid into the waiting sample pots. Once the rack of pots is removed the pumps automatically refill the burettes so the operator can fill the next rack. The operators only need to control the system when first priming and when they no longer want the burettes to refill. The system is very robust and is programmed to minimise the possibility of human error; it informs the operator of any required actions via two LEDs. The soil samples which are in the racks used by the dispense system are then filtered into the open pots used by the Liquid Transfer Robot