According to customer requirements, Guoguo Instrument has customized a semiconductor hot and cold table for the China Institute of Scientific Chemistry. This product adopts Peltier cooling and heating technology (TEC) to achieve precise control within the temperature range of -30 ℃~120 ℃. The hot and cold table reserves an atmosphere interface and is equipped with a humidity sensor in the reaction chamber, providing a controllable environment for relative humidity and temperature. It is compatible with a Raman spectrometer (Horiba LabRam Odyssey) to study the chemical reaction of PA in aqueous droplets.