tender for supply / procurement of heat based fault locating instrument, based on the principal of infra- red radiation detection with telephoto lens for electrical and mechanical predictive maintenance of substation and hv lines under ed una , thermal imager with telephoto lens ( 14 deg. lens ) : technical specifications: -ir resolution 464x348 pixels. -thermal sensitivity <50mk. -field of view 14 deg. x10 deg. -ifov of the camera is 0.52 mrad / pixel. -180 deg. lens rotation. -image frequency is 30hz. -digital zoom-1-6xcontinuous. -touch screen and camera temperature range is -20 to 1500 deg. c. -audible and visual alarms are available. -image file format is radiometric jpeg. -battery operating time is 4 hours and 2 number of batteries will be provided with the camera.