| 摘要 |
PURPOSE:To obtain always a correct signal output corresponding to a radiation quantity by using a non-enclosed chamber and using a simple constitution. CONSTITUTION:Non-enclosed chamber 21 is constituted cylindrically, and a high voltage is applied to high-voltage electrode 21A, and ou5put signals are generated from the other collecting electrode 21B. Temperature detector 24 is stuck to, for example, the outside circumference of non-enclosed chamber 21, and the temperature inside chamber 21 is detected successively. Meanwhile, pressure detector 25 is provided in a room where this measuring unit is installed, and measures the pressure in the room. These signals are inputted to operation circut 29 through respective A/D converters, and they are corrected in circut 29 and are outputted as signal D4 having a value corresponding to a correct radiation quantity. Next, this signal is displayed on display equipment 31. Thus, signals corresponding to the accurate radiation quantity can be always outputted asily by using a simple constitution.
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