According to the demand of the equipment air-leakage test in lubricating system, fuel system and launch vehicle, the characteris-tic of leakage test methods is analyzed. The design of a direct-pressure test device based on the precision pressure transducer is introduced. It in-cludes a Model DPS8000 pressure sensor, an embedded oil-free compressor, four temperature sensors and an ARM micro-processor STM32F103VE. The air-leakage calculating model based on Least-Square-Line-Fit is adopted. The temperature compensating algorithm is provid-ed to improve the test performance. This test instrument can test a container’s air leakage automatically and is easy to use.%针对某型装备润滑系统、燃油系统、助推器等气密性检测要求，分析了常用气密性检测方法的特点，介绍了一种基于精密压力传感器的直压气密性检测技术方案，采用DPS8000精密压力传感器作为系统压力检测单元，内嵌了无油干式压力泵作为压力源，采用了STM32 F103 VE微控制器，提出了基于最小二乘法的气压泄漏率计算模型和温度补偿模型，扩展了设备温度适应范围，提高了检测准确度，实现了气密性自动检测，检测压力和保压时间数字设定，具有操作方便、显示直观、灵敏度高、便携性好的特点。
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