15 are the parallel drive low electrodes 63 and 64 the electrodes 61 63 and 64 are connected together by the lead 67 furthermore as shown in fig8 located on the exterior side surface 68 of tine 15 is the drive low electrode 65 the electrodes 62 and 65 are connected together by the lead 70 while electrodes 63 65 are connected together by the lead 69 thus all of the drive low electrodes 61 65 are coupled together and to the lead 70 furthermore turning to fig5 and 6 the two pickup high electrodes 72 and 73 are respectively located on the exterior and interior side surfaces 54 and 56 of tine 14 as shown in fig7 and 8 the other two pickup high electrodes 74 and 75 are respectively located on the interior and exterior side surfaces 66 and 68 of tine 15 the electrodes 72 75 are connected together by the lead 77 referring again to fig5 and 6 the two pickup low electrodes 79 and 80 are respectively located on the exterior and interior side surfaces 54 and 56 of pickup tine 14 the electrodes 79 and 80 are connected together by the lead 83 and as shown in fig7 and 8 the other two pickup low electrodes 81.