The PurgEye 100, designed and developed by Huntingdon Fusion Techniques, is used for welding stainless steel, reading from atmospheric oxygen level (20.94 per cent), right down to 100 ppm (0.01 per cent) of oxygen. The PurgEye 100 is IP65 rated and comes with leak-tight push buttons, auto calibration features, vacuum-sealed leak-tight probe assembly, wrist/neck strap and tripod mount. With a clear LCD screen, the PurgEye 100 boasts a 24 millimetres high display with features, such as a low battery icon and the low sensor icon. When the monitor is not in use, an automatic sleep mode activates to conserve battery life.