Abstract: The present invention discloses a gas concentration measurement device and a method thereof, which are used to measure the concentration of carbon dioxide, and wherein a single-channel infrared gas detection module is used to detect a voltage signal of a gas sample. A digital-to-analog converter converts the voltage signal into an infrared signal value. A processing module calibrates the infrared signal value with a reference infrared signal value to generate a concentration of the gas sample. The initial reference infrared signal value is the voltage value of the normal carbon dioxide concentration in the atmosphere. The processing module calibrates the voltage drift of the gas concentration measurement device with the reference infrared signal value. Thereby is promoted measurement accuracy.

Abstract: The invention provides a non-contact style temperature measurement device, which utilizes a memory to memorize preset temperatures of a plurality of objects to be measured and their infrared emission rates. These temperatures, such as suitable temperature of bathing water for babies, best temperature for roasting beef, best refrigeration temperature for vegetables, and temperature that can be tolerated by human's skin, are specific values that are hard for people to memorize them. Therefore, a memory is used for memorizing these values, and a selector is used for selecting appropriate values. Also, an input device is used to input any objects to be added in for measurement or to revise the inputted preset temperatures in order to increase the utilization rate, security, and convenience of the temperature measurement device so that the device can become a necessity of daily life.

Abstract: An ear thermometer is tested at the time of manufacturing calibration for determining a temperature coefficient to be stored in information storing means. Based on the temperature coefficient, signal processing means compensates an undesirable temperature deviation caused by a change of an ambient temperature upon temperature taking, thereby enhancing the accuracy of the ear thermometer. Also, a method is provided for calibrating the ear thermometer by determining the temperature coefficient without increasing additional cost and calibration procedures.

Abstract: A two-way display infrared thermometer comprises a main body. An infrared wave-collecting device is disposed at the front end in the main body. A sensor is disposed at the bottom of the infrared wave-collecting device. A liquid crystal display is disposed on the surface of the main body to display the temperature. A direction detection device is disposed in the main body to detect the horizontal state of the main body so as to control the display direction of the liquid crystal display. A mount is disposed on the main body so that the main body can be supported and adjust the angle of measurement. A direction-switching device is disposed on the main body for manually switching the display direction of the liquid crystal display. Thereby, the infrared thermometer can straightly display the measured temperature for quick reading of the temperature value regardless of standing upright or upside down.

Abstract: An absolute radiation thermometer capable of evaluating the absolute value of infrared radiation power emitted from a target and received by a radiation sensor by means of electrical calibration, and calculating the temperature of the target basing on the responsive signal generated in the radiation sensor. To solve "Microphonic" problem, two identical sensors connected in parallel with the polarized orientations of their pyroelectric layers being in opposite directions so as to cancel the piezoelectric signals generated in the two sensors are used. Further, by using a floating power supply, which is isolated from the system power supply of the thermometer, for performing electrical heating, power supply noise can be greatly reduced.

Abstract: A waveguide for tympanic thermometer formed by an elongate hollow member having substantially ellipsoidal shape truncated at both ends along its major axis direction. The waveguide is interposed between a tympanic membrane of which the temperature is to be measured and an infrared radiation sensor so as to guide the infrared radiation from the tympanic membrane to the sensor. Alternatively, the waveguide may also be a hollow member including an end portion having a gradually reduced inner diameter toward the side of sensor. The gradually reduced end portion is preferably of a truncated half ellipsoidal shape having a length between about 1/10 to about 1/3 of the distance from the sensor to the distal end of the waveguide.