The PTC600 is Jiupo's 600L pharmaceutical stability test chamber, purpose-built for long-duration drug stability programmes under ICH climatic zone conditions. With five adjustable shelves at 256 mm spacing and precise temperature (0–70°C) and humidity (10–95%RH) control in a 900×800×1940 mm cabinet, it accommodates large sample sets while maintaining tight uniformity. Interior lighting and programmable control support photostability studies and accelerated ageing protocols.