ECmallUS via Amazon offers the Meterk Digital Handheld Mini Wood Moisture Meter for $21.79. Coupon code "OM5JLXMW" cuts that to $14.82. With free shipping for Prime members, that's the lowest price we could find by $2. It can be used to detect the moisture level in sawn timber, paper, cardboard, mortar, concrete, and plaster as well as the environment temperature. Deal ends November 21.