Hikvision DS-2TP31-3AUF Camera Support , Camera Signal Analog, Resolution 160 X 120, Lens Fixed, Lens Size 3.1mm, Infrared Distance Non Infrared, Durability Weather Resistant, Image Device Uncooled focal plane arrays, OSD Menu English, On Screen Display Menu, Auto Gain Control, 1 Year Warranty. The DS-2TP31-3AUF from Hikvision is a handheld thermography camera with 3.1mm lens. It designed to effectively measure differences in temperature in situations that require the rapid identification of potential heat leaks.