| 摘要 |
PURPOSE:To confirm accurately the residual oil quantity to simplify work for ordering, by detecting the liquid surface level in each tank and by calculating automatically the residual oil quantity on a basis of this detection value and data from a memory unit where various fixed data are stored. CONSTITUTION:The liquid surface level in oil tank 20 where various kinds of oil are stored is detected by a capacitor dependent upon electrode bars 21 and 22, and this detected liquid surface level is converted to a voltage value by converter 23. Level signals of respective sensors 1-3 having electrode bars 21 and 22 are converted to voltage values by converters 4-6, and these voltage values are supplied to operation unit 10. Fixed information different by respective oil tanks 20 are stored previously in memory units 7-9 and are applied to operation unit 10 to calculate the residual oil quantity in tanks 20 corresponding to sensors 1-3, and the calculated residual oil quantity is transmitted to a wholesale shop, etc., and is displayed on output device 12. |
