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[PSUBS-MAILIST] Senor
I use a "Multi-Max" Unit. Very small but big in price. This unit cost
me about 1700.00 new and includeds: Oxygen, Chlorine, Carbon Monoxide,
and toxic and combustible senors. It has for digital screens where they
show you the readings, Oxygen: 0-30% and everything else is ppm. It has
alarms that go off on a preset reading that you can set and can be field
calibrated. Anyway.....look for it on Ebay within a couple of days.
charlie