Delmhorst F-6/6-30/1235 F-6/6-30 Analog Moisture Meter Value Package Easy-to-read analog display Built-in calibration check Rugged construction ensures years of reliable use Optional sturdy plastic carrying case. With a simple analog display and easy-to-use controls, the F-6 and F-6/6-30 are great for beginners, but accurate enough to meet the needs of experienced hay makers as well. Do you prefer analog displays to digital ones? Then the F-6 and the F-6/6-30 meters are your go-to moisture meters for hay. These moisture meters feature simplified controls, making them easy for newbies to learn, but are still reliable and accurate enough for seasoned hay makers. The F-6/6-30, in particular, is ideal for those who make hay for export to markets that require lower %MC in their hay. Both of these meters feature: An easy-to-read analog display. Built-in calibration checks.