system will modify the supply voltage accordingly and so forth if the output of the sensor is greater than a maximum upper threshold the control system will actuate an alarm so that the operator of the harvester may take corrective action application_number US 62526903 A description referring to fig1 the general configuration of the harvester control is depicted as can be seen the output of a sensor u201c s u201d shown in dashed lines is operatively connected to a control system 10 whose output is operatively connected to a control mechanism 50 shown in dashed lines and an alarm arrangement 60 more particularly the control system 10 comprises a relay arrangement 20 and an alarm arrangement 60 the control system 10 and the relay arrangement 20 are depicted in greater detail in fig2 starting with sensor u201c s u201d the output signal of the sensor is directed to flow into the control system 10 by closing switch 12 the relay arrangement 20 comprises a plurality of relays 22 24 26 and 28 which are configured to be energized at predetermined voltages that are within the output range of the sensor for example if the voltage output of the sensor u201c s u201d varies between 0 and 5 volts the energization level of the relays would be selected so that they would be operational within the 0 to 5 volt range the relays 22 24 26 and 28 may have energization levels that are different from each other and at levels that may be progressively and incrementally higher thus for a sensor whose output signal ranges from 0 to about 5 0 volts the energization levels for relays 22 24 26 and 28 could be 3 0 3 5 4 0 and 4 5 volts respectively it will be appreciated.