Four-gas monitor offers one-touch ease of useCustodian C, a new low-cost four-gas monitor, offers simplified features and easy operation via a single button. One button turns the instrument on and off and resets the alarms. Click here to enlarge imageThe monitor measures combustible gas, oxygen, carbon monoxide, and hydrogen sulfide, and has an internal electric pump. The unit features an auto-zero function to assure the user of correct operation.Its construction is enhanced with an impact-resistant rubber boot. The monitor is also water resistant and can withstand total immersion in water for as much as 1/2 hr. The unit weighs a little more than 1 lb.Gas levels are displayed on a high-c...

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