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MSA Watchman Multigas Monitor

Watchman Multigas Monitor by MSA

The watchman Multigas Monitor is a durable, hand-held instrument used to detect and monitor combustible gases, oxygen and toxic gases in workplace atmospheres, especially in confined spaces such as manholes, storage tanks, tank cars, vaults, mines and sewers.

Designed for rugged handling, the monitor incorporates the state-of-the-art technology of the Passport Personal Alarm in the strong, aluminium housing of the Portable Indicator and Alarm, Model 360. The Watchman Monitor also is easy to operate. The face of the instrument simultaneously displays the readings of all gases monitored. Users need not carry several instruments for monitoring multiple gases.

Microprocessor-based, the instrument is menu-driven for ease of operation. The user can "page through" various menu activities for calibration and display options.


  • Continuously monitors combustible gases, oxygen, carbon monoxide and other toxic gases simultaneously; displays gas concentrations over large, easy-to-read digital readout.
  • Rugged, portable aluminium case with stands harsh treatment.
  • Wide range of measurement options, including peak exposure, short-term exposure and time-weighted average.
  • Three push-buttons provide simple operation.
  • Simplified calibration system eliminates need to open the instrument.
  • Visible and audible alarms activate when gas concentrations exceed preset limits.