| 摘要 |
PURPOSE:To simplify the assembly and inspection of a gas rate sensor and prevent the sensor from disconnection by incorporating the body of the sensor having a heater wire for keeping the sensor at a setting temperature, an electric power source and a controlling circuit for the sensor in one united body. CONSTITUTION:A heater wire 2 for preventing a gas rate sensor from the influence of external temperature is wound around the external peripheral surface of a casing 1a for the body 1 of the sensor and one end part 1b of the casing 1a is fixed on one-end parts 3a-5a of three holders 3-5. The other end part 1c is fixed by a cylindrical holder 7. Other end parts 3b-5b of the holders 3-5 are fixed on a covering body 11 of a casing 10 by screws. Printed substrates 8, 9 are put and fixed between the holder 5 and a holder 6 fixed on the covering body at a position opposed to the holder 5. A temperature sensor is arranged on the inside of the sensor 1 and electric circuits for controlling the heater temperature to a set value are mounted on the substrates. |
