New and unused.  SM-RTD is available with a 2” to 18” RTD sensor.  SM-RTM supports third-party RTD sensors.  High accuracy of ±0.15 °C / ±0.06% @ 0 °C (SM-RTD).  Up to a 10-year battery life.  Self-contained, rugged design.  Secure AES encryption.  Technical details: IP66, -40 ˚C to 70 ˚C (-40 ˚F to 158 ˚F); 900/915 MHz range: Up to 1.4 Miles / 2.3 km with Clear Line of Sight; 2.4 GHz range: Up to 1.9 Miles / 3.1 km with Clear Line of Sight; 868 MHz range: Up to 1.5 Miles / 2.4 km with Clear Line of Sight.