SURVEY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a survey device capable of operating an electronic circuit at an environmental temperature of 40°C or higher without using an element having a special specification.SOLUTION: A survey device has: a sensor 8 used at an environmental temperature of 40°C or higher; a sensor control circuit 9 including a control circuit for controlling the sensor 8 and a transmitter-receiver circuit; a vacuum insulation container 6 which is a vacuum insulation Dewar for immersing the sensor 8 into liquid nitrogen 7 and storing it, and storing the sensor control circuit 9 on a furthermore upper part than a liquid level of the liquid nitrogen 7; and a pressure-resistant envelope 1 for storing the vacuum insulation container 6.SELECTED DRAWING: Figure 1