便携式仪表 meaning in English

portable apparatus
portable instrument

Standard practice for combustible gases in the gas space of electrical apparatus using portable meters
用便携式仪表测定电气装置气体空间中可燃性气体的标准试验方法
The singlechip itself integrated the cpu , memory , timer , counter , i / o and watchdog electrocircuit is especially applicable to portable instruments
这款单片机将cpu 、存储器、定时计数器、 i / o口以及看门狗集成于一个芯片当中，特别适用于便携式仪表。