(AgraTronix) The first and only handheld hay tester that includes a calibrator. Within 20 seconds you can use the calibrator clip to calibrate both the electronics and probe sensor. Gives you the convenience of calibrating before each season, each cutting or whenever you want. Can be used on all hay varieties and all bale types. Measures a moisture range of 8% - 44%, but is most accurate from 12% - 30%. Measures bale temperature from 33 - 250 degrees F. One piece unit with 18" aluminum probe. One year warranty.