microvoltometer

A new kind of radio frequency micro-potentiometer is introduced.

介绍了一种改进的新型射频微电位计。

Water potential of two typical soils in loess is measured and studied with PCT 55 thermocouple psychrometer and HR 33T millvoltmeter manufactured by Wescor Corporation in USA,and the measurement results of soil water characteristic curve is compared with the method of soil moisture pressure membrane.

用美国 Wescor公司生产的 PCT- 5 5热电偶土壤湿度传感器和 HR- 33T微伏计对黄土区 2种典型土壤的水势进行了测定试验研究 ,并与压力膜法测定的土壤持水曲线进行了比较。