ExtechMO257 Pinless Moisture Meter

It marks walls if you slide the probe across surfaces.

Sold as new by Amazon, but arrived with signs of use (scratches inside battery compartment), 2 of the 3 batteries missing and no instruction manual. Pretty poor. As a product, it seems to work ok with repeatable results.

A nice little unit that appears to work very effectively.Only slight drawback is that the position of the hand holding it affects results so need to be careful not to change your grip from calibration stage if you want repeatable results. I think that's inevitable with this sort of meter?The overall rating has one star removed because the meter arrived without its advertised battery and in a package that had been opened. I assume it was a return from someone who used it then returned it?? Meter itself was fine though so I kept it.

Does what it should do, easy to operate without causing any pin holes in material under test. Appears to be accurate with clear display and audio warnings for high readings.

Really easy to use and simple to set-up and read. Instructions are clear and damp/risk/dry percentage readings for various materials are given. Perfect for professional use or DIY.