Tough, functional detector for LEL, CO, H2S and O2. Rugged, IP67 certified housing provides unsurpassed durability, including ability to survive 20' drop. Easy to operate even in low-light conditions with large, glove-friendly buttons and high-contrast display. Features fast, high-performing sensors, exclusive MSA MotionAlert™ and InstantAlert™ and end-of-sensor-life warning. Sensor response and clear times under 15 seconds. Sixty-second span calibration time. Two-tox CO/H2S sensor with virtually no cross-channel interference. Digital output sensors provide less susceptibility to RF interference. Four-year sensor life with 24-hour run time. Includes quick-start card, datalogging, charger, calibration cap and tubing, and CD manual.