The UEi LPKITPLUS Pro Plus Leak and Pressure Test Kit is the ultimate in testing kits. Included are the CD100A combustible gas detector, the CO71A Carbon Monoxide Detector, and the EM151 Electronic Manometer. The CD100A features a long 18 inch gooseneck for hard to reach places and a tip light that lights up the area of the leak. The CO71A features a highly sensitive CO detection of up to 999 ppm and a one button to zero feature for easy calibration. The EM151 measure both positive and negative pressure up to 20’’ wg.