He identified a common issue also related to valuable liquid waste - wine spillage when filling or topping the barrels.
The couple adapted their proven DTexH2O technology to develop the DTexWine which they took to the Fieldays Innovation Tent.
Like their first product, Graeme says DTexWine pays for itself in no time simply by minimising waste.
"Using our new device saves time, because it is accurate, and maximises production, because all the wine goes into the barrel and none onto the floor."
He says a number of winemakers showed an interest in the product and, with a couple of recommended modifications, he believes it is viable to put it into production.
The probe is designed to fit into the bung hole as the barrel is being filled and indicates when it is full.
A harder part of the winemaking process is topping - a process to top up the barrels because of evaporation.
At this stage all the barrels are stacked, it is difficult to manoeuvre and usually quite dark.
The DTexWine has been modified to make this process easier and accurate, and even provides a light so the winemaker can see what they are doing.
- To register your interest, or find out more about DTexWine, email dtexwine@gmail.com