摘要:
An apparatus which measures a thickness of a layer using transverse waves of ultrasonic waves, and includes: a sensor unit having a probe for obliquely transmitting and receiving to and from the surface of a material to be measured having first and second layers with different acoustic impedances in a depth direction: an extractor for extracting, from a wave reception signal representing waves received by the probe, reflected waves from a boundary between the first and the second layers of the material; and a calculator for calculating a distance between the surface of the material and the boundary.
摘要:
A vapor controller capable of reducing a thermal influence upon a liquid material to be vaporized as far as possible and always stably controlling a vaporized gas in flow rate in high-speed response and a vapor controller having a vaporizer capable of improving a purge efficiency are provided. A vapor controller in which a vaporizer covered with a diaphragm is formed in a body block including a heater and a temperature sensor while a liquid material inlet passage and a gas outlet passage is formed within said body block so as to be opened on an end face of the body block at one end thereof, respectively, and communicated with said vaporizing chamber at the other end thereof, respectively, said diaphragm being driven by a pressedly driving portion provided in the body block to adjust an openness of an opening facing to the vaporizing chamber of said liquid material inlet passage, said liquid material introduced into the vaporizing chamber through the liquid material inlet passage being vaporized within the vaporizing chamber, and a gas generated by a vaporization being discharged through said gas outlet passage.
摘要:
A liquid flow meter is connected in series with a vaporizer having a vaporizing function and a flow rate-adjusting function and vaporizing a liquid material supplied through said liquid flow meter to compare a flow rate detected by the liquid flow meter with a set value, whereby controlling a quantity of liquid material introduced into a vaporizing chamber provided in said vaporizer on the basis of this comparison result, and thus a flow rate of vaporized gas can be always stably controlled in high-speed response.