探针 (tànzhēn): probe

Measure Word

一根探针 gēn

Yīshēng yòng tànzhēn jiǎnchá shāngkǒu.

The doctor used a probe to examine the wound.

Tàikōng tànzhēn yǐ fēi chū tàiyánxì.

The space probe has flown out of the solar system.

Zhège tànzhēn kěyǐ cèliáng wēndù hé shīdù.

This probe can measure temperature and humidity.

memory

Think of 探 (to probe/explore) + 针 (needle) — a needle for probing. The same characters describe both a medical probe and a space probe.

探 tàn

针 zhēn