Abstract: In gas analyzing apparatuses, interference noises should be reduced. A gas analyzing apparatus for analyzing component included in measuring object gas, including: a light emitting unit to irradiate laser light to the measuring object gas; a light receiving unit to receive the laser light having passed through the measuring object gas; an actuating unit to change an optical path length of the laser light by moving at least one optical element that is arranged in a light path where the laser light is passing; and a calculating unit to calculate concentration of the measuring object gas, based on signals detected by the light receiving unit in two states where the optical element is at different positions by n/2 times the wavelength of the laser light (where, n is integer) is provided.

Abstract: A coin identification device includes: a first magnetic sensor detecting an amount of magnetic variation while the coin passes in the carrying direction; a second magnetic sensor installed where the second magnetic sensor detects a passage of an arc of a small-diameter coin when the first magnetic sensor detects a passage of the small-diameter coin; and a third magnetic sensor installed where the third magnetic sensor does not detect a passage of an arc of the small-diameter coin when the first magnetic sensor and the second magnetic sensor detect a passage of the small-diameter coin and detects a passage of an arc of a large-diameter coin; and an identification control unit identifying an outer diameter of the small-diameter coin and the large-diameter coin based on the amount of magnetic variation of the first magnetic sensor.

Abstract: In gas analyzing apparatuses, interference noises should be reduced. A gas analyzing apparatus for analyzing component included in measuring object gas, including: a light emitting unit to irradiate laser light to the measuring object gas; a light receiving unit to receive the laser light having passed through the measuring object gas; an actuating unit to change an optical path length of the laser light by moving at least one optical element that is arranged in a light path where the laser light is passing; and a calculating unit to calculate concentration of the measuring object gas, based on signals detected by the light receiving unit in two states where the optical element is at different positions by n/2 times the wavelength of the laser light (where, n is integer) is provided.

Abstract: A coin identification device includes: a first magnetic sensor detecting an amount of magnetic variation while the coin passes in the carrying direction; a second magnetic sensor installed where the second magnetic sensor detects a passage of an arc of a small-diameter coin when the first magnetic sensor detects a passage of the small-diameter coin; and a third magnetic sensor installed where the third magnetic sensor does not detect a passage of an arc of the small-diameter coin when the first magnetic sensor and the second magnetic sensor detect a passage of the small-diameter coin and detects a passage of an arc of a large-diameter coin; and an identification control unit identifying an outer diameter of the small-diameter coin and the large-diameter coin based on the amount of magnetic variation of the first magnetic sensor.