| 摘要 |
PURPOSE:To make a detecting part compact by comparing the output difference of first and second signal output means, wherein secondary coils, which are provided at the upper and lower sides of primary coils, are connected in series, with a threshold value. CONSTITUTION:The primary coils 51-56 are wound around the outer surface of a supporting tool 4 at a specified interval. The secondary coils 61a-66a and 61b-66b are wound at the upper and lower sides of the primary coils. The two secondary coils form a pair, respectively. The coil pairs form liquid level detecting points L1-L6 for liquid sodium. The primary coils 51-56 are divided into two groups 51-53 and connected in series, respectively. Their power source terminals are connected to AC power sources I11 and I12. The secondary coils 61a-63a on the upper sides of the primary coils 51-53 are connected in series, respectively. The sum of the output of the respective coils is taken by terminals A. The sum of the secondary coils 61b-63b on the lower side is taken by terminals B. Likewise, the sum of the output of the secondary coils 64a-66a and the sum of the outputs of the coils 64b-66b are taken out by terminals C and D. |
