The new SM100 sampling pump module draws combustible or toxic gases at 0.05 to 1 LPM from monitored areas to a gas detector, making it easier and cost-effective to measure potentially hazardous gases in areas that are too remote, inaccessible, or too cold, hot or wet for direct sensor monitoring. It supplies gas for up to three gas detectors, and features a low-flow indicator. It also includes a trouble relay that provides a local signal indication of the low-flow condition.