AgraTronix 07100, DHT-1 Portable Hay Moisture Meter with 18" Probe Direct readout for % moisture and temperature (F and C) Backlit LCD display for nighttime use Sturdy pistol-grip handle with extra-rugged probe shaft made of aircraft aluminum Operating Range (Moisture): 14.4% to 44% depending on hay tested Operating Range (Temperature): 32 - 225 F (0 - 107 C)