Low-pressure test chamber research and development in China

As a high-end testing chamber, the low-pressure test chamber is manufactured by only a few specialized test box manufacturers in Beijing and Chongqing. Yashilin Instruments stands out as one of the leading environmental testing equipment brands. With continuously improving vacuum pipeline technology, it meets the diverse requirements of domestic and international customers for different altitude conditions. This low-pressure test chamber is widely used in industries such as aviation, aerospace, information technology, and electronics. It is designed to evaluate the environmental adaptability and reliability of instruments, electrical products, materials, and components under low-pressure, high-temperature, or low-temperature conditions—either individually or simultaneously. It also enables the measurement of electrical performance parameters during these tests. The test chamber features a monolithic composite structure, consisting of an insulated pressure-bearing box at the front, a refrigeration unit at the rear, a vacuum system, and an electrical controller located on the door of the chamber. Key technical specifications include: - **Temperature Range A**: -20°C to 150°C - **Temperature Range B**: -40°C to 150°C - **Temperature Range C**: -60°C to 150°C - **Temperature Range D**: -70°C to 150°C - **Pressure Range**: From atmospheric pressure down to 0.5 kPa - **Pressure Deviation**: - Normal pressure ~ 40 kPa: ±1.8 kPa - 40 kPa ~ 4 kPa: ±4.5% - 4 kPa ~ 0.5 kPa: ±0.1 kPa - **Vacuum Time**: ≤ 45 minutes (from normal pressure to 0.5 kPa) - **Temperature Fluctuation**: ±0.5°C (at normal pressure, no load) - **Temperature Uniformity**: ≤ ±2°C (at normal pressure, no load) - **Temperature Deviation**: ≤ ±3°C (at normal pressure, no load) - **Heating Rate**: 1.0–3.0°C/min - **Cooling Rate**: 0.7–1.0°C/min The control system is equipped with a Siemens PLC controller and a color LCD touch screen for intuitive operation. The system ensures precise temperature control, with a setting accuracy of ±0.1°C, indicating accuracy of ±0.1°C, and a resolution of ±0.1°C. Sensors include a platinum resistance PT100Ω/MV for temperature monitoring and an electronic pressure transmitter for pressure detection. The heating system uses a fully independent nickel-chromium alloy electric heater, while the refrigeration system utilizes original French "Taikang" fully enclosed air-cooled compressors, available in single-stage or multi-stage configurations. The circulating system features a low-noise, temperature-resistant motor with a multi-leaf centrifugal fan wheel to ensure even air distribution. The outer casing is made of carbon steel plate with phosphating and electrostatic spray treatment, while the inner chamber is constructed from high-quality SUS304 stainless steel with a mirror finish. Insulation materials include polyurethane rigid foam and superfine glass fiber cotton for optimal thermal performance. The door frame is insulated with a double-layer silicone rubber seal that resists high and low temperature aging. Safety features include protection against leakage, short circuits, over-temperature, motor overheating, compressor overpressure, overload, and overcurrent. The timer function allows for adjustable timing from 0.1 to 999.9 hours, minutes, or seconds.  This advanced low-pressure test chamber is ideal for rigorous environmental testing, offering precision, durability, and reliability for a wide range of applications. Whether you're conducting product development, quality assurance, or compliance testing, Yashilin Instruments provides a comprehensive solution tailored to meet your needs.

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