Newcon Sentinel LRF (640) Thermal Rangefinder BinocularsThe Newcon Sentinel LRF (640) Thermal Rangefinder Binoculars are designed for tactical use by the military and law enforcement. They have both a thermal sensor and a laser rangefinder built in. The 640x480 pixel thermal sensor has a sensitivity of <55 mK at f 1. 0 and an operating wavelength of 8 14. Thermal images are received through a Germanium 75mm f 1. 0 lens. The detection range is 2500m (~2700 yards). The laser rangefinder can range a 2. 3x2.