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Confined spaces can be very spooky places. With inhabitants like molds, creepy crawlies and deadly gases, it's easy to see why: they're among the harshest places on the planet. A rural Maine community experienced this firsthand when Winfield Studley and Richard Kemp, two workers with Stevens Electric and Pump Services, suddenly went missing on the job. The two had spent the morning draining and servicing a flooded sewage tank connected to a local inn. At some point over the cou …

Calibration is very important for a gas monitor. It reestablishes a base line accuracy for the sensors, both electro-chemical and LEL catalytic bead. In order to perform as they were designed, gas monitors need to periodically be readjusted in the same way a guitar string needs tuning. Calibration of your gas monitors isn't difficult or time consuming (unless you have several hundred monitors, in which case it can be very tedious) and it's essential for accurate measurements over time. …