KPM Aqua-Boy LMIII [LMIII-213L] Leather Moisture Meter w/ 213L Surface Electrode Head For Leather. The Aqua-Boy LM range of moisture meters are specifically calibrated and tailor made for the leather industry. Aqua-Boy moisture meters analyse the moisture content of solid materials in a host of applications. Easy to use and highly portable, these compact meters deliver instant results with an accuracy of 0.1%. Recommended by official test and research laboratories, Aqua-Boy moisture meters are the automatic choice of industrial specialists and scientists worldwide.