UPGRADING its twin metering control box and adding a GPS speed sensor for its Fan Jet Duo spinning disc granular applicator, has has greatly extended the Stocks Ag machine's capabilities.

The new set up allows precise control over the Fan Jet Duo's pair of contra-rotating applicators, which are typically used to broadcast slug pellets up to a maximum of 36m.

The sophisticated TM (twin metering) controller is supplied with a 4.3-inch colour touchscreen and has a simple and intuitive layout. It displays the application rate and forward speed as well as cutting edge features such as section control and headland control.

It is also capable of applying variable rates in conjunction with an uploaded precision farming map, which is clearly shown in real time on the control screen.

The TM controller features four main run screens to enable the user to switch between the home screen, parameters screen, details screen and mapping screen.

Disc speed control enables the operator to reduce disc speed and therefore the spread width by pressing the icon on the home screen. This can be done for both applicators either individually or together.

A consistent application rate is ensured as the TM Controller automatically reduces the rate to match the disc speed with the use of its own GPS sensor.

Headland control enables the operator to define the field boundary with the first pass around the field using the integrated mapping facility. If the spread width crosses an area/section that has already had product applied then the application rate will automatically switch off.

The software allows operators to create and store product application information, including the calibration settings for each product. A job creation and export feature make it possible to record the application history of each field task.

An optional 24-volt power inverter is available for larger self-propelled sprayers running on such electrics.

The Fan Jet Duo is commonly mounted to self-propelled sprayers, or tractor front linkages. It can also be rear-mounted although it is not recommended on sprayer booms due to its weight. UTV vehicles can also be used, as long as the high current requirement is met.

Both electrical power and height above crop of spinning disc are limiting factors in spread width and the Duo can be fitted with either twin 65, or 130-litre hoppers.

Prices start from £8345 for a Fan Jet Duo 65 with TM controller and GPS Speed Sensor.