... power supply 2011---FM series Digital Panel Frequency/Tacho/Count Meter Features:1,Optional timing,counting,frequency ... 0.01Hz. Various switch input Couting: 0-9999,accuracy:0.01%.High precision & reliable performance3,Control output: with demical point ... inductor, Power Meter, Coulometer, Voltage Meter, Ampere Meter, Counter, Tacho Meter, Frequency Meter, flowmeter, Timer, Timer Relay, Solid State ...