The constant temperature and humidity chamber is available in several models: BE-TH-80, 150, 225, 408, 800, and 1000L (H/M/D). The letter codes represent different temperature ranges. "L" stands for low temperature, covering -70°C to 150°C; "M" refers to medium temperature, ranging from -40°C to 150°C; "H" indicates high temperature, spanning from -20°C to 150°C; and "D" covers a standard range of 0°C to 150°C. The suffixes such as M8/L8/H8/D8 denote the use of the TEMI880 touch controller, while M3/L3/H3/D3 indicate the use of the TEMI300 push-button controller. Key technical specifications include an internal chamber size of 60x40x45 cm, a temperature range from room temperature to -70°C up to 100°C, and a humidity range of 20% to 98% RH. The temperature fluctuation is within ±0.5°C, with a uniformity of ≤±2°C. Humidity deviation is maintained at ≤+2 to -3% RH. The cooling rate ranges from 0.7 to 1.2°C/min, while the heating rate is between 1.0 to 3.0°C/min. The power supply requires 380V at 50Hz. The chamber's structure features a high-quality A3 steel outer shell, finished with a smooth powder coating. The inner liner is made of imported SUS304 mirror stainless steel, ensuring durability and ease of cleaning. Insulation uses high-density glass fiber cotton with an 80mm thickness. A long-axis fan motor with a high-temperature resistant multi-wing impeller ensures efficient air circulation. The door is sealed with a double-layer heat-resistant sealing strip, and the door handle is designed for easy operation. The base is equipped with durable PU casters for mobility. A multi-layer hollow tempered glass observation window with conductive film allows clear viewing of the test process. An external test hole on the left side facilitates the connection of cables or signals. The temperature and humidity control system utilizes an advanced Japanese "OYO" digital controller, featuring PID regulation for precise and stable performance. It displays temperature with ±0.1°C accuracy and resolution. The PT100 platinum resistance sensor ensures reliable readings. The electrical control system uses imported components from "Schneider" and "Meilan Rilan" for enhanced stability and safety. The heating system employs far-infrared nickel alloy heating elements, while the humidification system uses an external boiler steam humidifier with energy-saving technology, reducing consumption by 70%. It also includes automatic water level compensation and multiple water shortage alarms. The humidification heater is made of high-speed infrared stainless steel titanium alloy. The control method combines PID and S.SR for coordinated temperature and humidity management. The protection system includes overtemperature, phase reversal, refrigeration overload, overpressure, and leakage protection. It also features automatic shutdown after fault detection, ensuring safe and reliable operation during testing.

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