This electrical resistance Type moisture meter offers three separate scales: paper, baled scrap paper and reference. The moisture scale range for paper is 4.3 to 18 percent , for baled paper the range is 5 to 40 percent , and for the reference scale it is 0 to 100. The contact pins mounted on top of the meter provide 5/16'' (0.8 cm) penetration for testing paper tubes or corrugated stock. The meter also features an audible out-of-range alarm, internal calibration check, 100 data point memory, and average/maximum readings. Paper moisture inspections Kit (designed to be expanded with additional electrodes for specific applications) package includes: contact pins (2497/A-100) and case  what's included: 9V battery and hard plastic carrying case ideal for testing paper materials such as paperboard, corrugated stock and paper tubes meter measures through built-in pins and optional pin electrodes.