View replacement sensors here! **Full 4-year warranty supports the entire instrument, including the sensors and battery.** Quick Facts • Survives 25 drops from 4 feet (1.2 meters) (MIL-STD-810G 516.6 Transit Drop 3rd Party Certified) • Can survive an incidental 25-foot (7.5-m) drop onto concrete • Operating temperature range: -40°F to +140°F (-40°C to +60°C)