| 摘要 |
PURPOSE: To obtain an ultrasonic densitometer which can be constituted of a small capacity memory. CONSTITUTION: A propagation time measuring section 7 measures the propagation time of ultrasonic wave and outputs a propagation time data A. A temperature measuring section 8 measures the temperature of an objective gas and outputs a temperature data B. A first memory section 12 outputs a temperature correction coefficient (k) corresponding to the temperature data B. An operating section 13 multiplies the propagation time data A by the temperature correction coefficient (k) to output operation results C. A second memory section 14 outputs a concentration data D corresponding to the operation results C. |
