Abstract: A test apparatus for measuring the temperature of a reactor using a thermochromic pigment, and a method for controlling the test apparatus are disclosed, based on a technology for irradiating light of different wavelengths on a thermochromic pigment accommodated in a reactor and estimating temperature of the reactor using a difference between absorbance values corresponding to the light of the different wavelengths. The test apparatus includes at least one light emitter configured to irradiate light of different wavelengths onto a chamber included in the reactor, a light receiver configured to receive the light that propagates through the chamber, and a controller configured to measure absorbance values of the thermochromic pigment in correspondence to the different wavelengths of the light, to calculate a difference between the measured absorbance values, and to determine a temperature of the reactor in correspondence to the calculated difference between the absorbance values.

Abstract: A test device, test system, and control method of the test device, which defines a light irradiating area in a reactor to prevent a decrease in magnitude of a detected signal that may result due to scattering of light that has penetrated other area of the reactor than an area containing an object for detection and improve a dynamic range. A test device may include a light source configured to irradiate light; a reactor configured to include at least one first area to contain an object for detection; and a photo detector configured to receive light that has been irradiated from the light source and has passed the reactor that contains the object for detection, wherein the light source is configured to limitedly irradiate the light to the first area of the reactor.

Abstract: A test apparatus for measuring the temperature of a reactor using a thermochromic pigment, and a method for controlling the test apparatus are disclosed, based on a technology for irradiating light of different wavelengths on a thermochromic pigment accommodated in a reactor and estimating temperature of the reactor using a difference between absorbance values corresponding to the light of the different wavelengths. The test apparatus includes at least one light emitter configured to irradiate light of different wavelengths onto a chamber included in the reactor, a light receiver configured to receive the light that propagates through the chamber, and a controller configured to measure absorbance values of the thermochromic pigment in correspondence to the different wavelengths of the light, to calculate a difference between the measured absorbance values, and to determine a temperature of the reactor in correspondence to the calculated difference between the absorbance values.