| 摘要 |
PURPOSE:To let know the increase and decrease states of radioactivity at a plurality of places from a remote place, by operating a Geiger counter at every definite time while automatically sending information by an automatic dial when radioactivity is present in a definite value or more at the operation time. CONSTITUTION:A preset part 3 is set so as to start the operation of an automatic dial apparatus 5-1 corresponding to the numbers of the pulse sound of a Geiger counter 1. A first timer 4 emits a reset pulse at every 60sec and, for example, when 10 or more of pulses are applied during this time, an H-level is outputted from an output terminal OUT. A relay Y-3 forms the loop of a telephone cable and a dial tone detecting part 5-2 starts the operation of an abbreviated dialing generating part 5-3. When a receiving side responds, an alarm sound generating apparatus 7 is started by the output of a polarity detecting circuit 6 to send out a sweeping intermittent signal. By this mechanism, the receiving side can know that radioactivity reaches a set value or more.
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