The Trimble® GreenSeeker handheld crop sensor is an affordable, easy-to-use measurement device used to assess the health—or vigor—of a crop in order to make informed nutrient management decisions on your farm. Use the GreenSeeker handheld to instantly take a reading of your crop’s health. Simply aim the sensor on the underside of the device at a crop 24 to 48 inches (60 – 120 cm) away and pull the trigger to get a reading Readings can be used to make non‑subjective decisions regarding the amount of fertilizer to be applied to your crop, resulting in more efficient use of fertilizer—benefiting your bottom line as well as the environment. Collecting data is easier than ever with Bluetooth® connectivity built into the sensor. With a linked mobile device running a compatible app (such as GreenSeeker BT Logger for Android™ mobile devices), NDVI values can be recorded for future analysis. Power Battery 3.7V DC nominal, 1130 mAh Charging 5V DC, 320 mA max Charge Time 5.5 hours (full charge) Continuous Operation Time 12 hours Connectors Remote Trigger Switch Port 2.5 mm Stereo phone jack Charging Port Micro-B (micro USB) Operational Range Charging Temperature 50 °F - 104 °F (10 °C - 40 °C) Operating Temperature 50 °F - 122 °F (10 °C - 50 °C) Storage Temperature 14 °F - 158 °F (-10 °C - +70 °C) Mechanical Dimensions 3.5” x 10.5” (9 cm x 27 cm) Weight 11 oz. (310 g), including battery Housing Material Xenoy plastic Rating IP54 Optical RED 660 nm NIR 780 nm Field of View 10” at 24” , 20” at 48” Operating Height 24” – 48” Connectivity Bluetooth Bluetooth Low Energy (BLE) 5.1