The AP‑300 w/ Temp Controller is a special version of the popular AP‑300 automatic polarimeter, enhanced with a temperature control system to ensure stable and precise measurements. It measures optical rotation, International Sugar Scale (°Z), specific rotation, concentration, and purity. The device provides automatic temperature compensation between 18–30 °C, ensuring reliable results under varying conditions. With a high accuracy of ±0.01° / ±0.03 °Z and a resolution of 0.001°, it features a backlit color LCD display, user‑friendly menu navigation, 30‑reading memory, RS‑232C interface, and optional DP‑AD printer support. The polarimeter complies with GMP, GLP, and ICUMSA standards, making it ideal for laboratories and production facilities in the food, sugar, pharmaceutical, and chemical industries.