| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive measuring device capable of realizing continuous measurement in a long term. SOLUTION: This measuring device 2 is provided with a light receiving element 13 for photoelectric transducing communicating lights outgoing from an outside device 3, a control part 16 for executing measuring processing for a prescribed measurement item, and for executing prescribed processing by inputting a reception signal generated based on the photoelectric conversion, a battery P1 for supplying currents for an operation to at least the light receiving element 13, and a resistance R1 for limiting currents arranged in the current route of currents for an operation to be supplied to the light receiving element 13. This measuring device 2 is provided with a differentiating circuit C1 arranged in the current route for limiting the supplying time of the currents for an operation to the light receiving element 13 to a time shorter than at least the light receiving time of the communicating lights by a differentiating operation. The control part 16 inputs voltage change generated at one end of the resistance R1 due to the supply of the currents for an operation at the time of light reception of the light receiving element 13 as a reception signal. |
