Extech mo300 moisture meter extech mo300 p the extech mo300 is a pinless moisture humidity meter with ir thermometer this moisture meter is supplied with bluetooth capabilities for use with the android application exview mo300 p p this pinless meter incorporates a patented built in ir thermometer and 20 point memory the meter can monitor moisture in wood and other building materials with no surface damage with the pinless moisture sensor pin type moisture probe included p p mea