TM-802 CO meter is used for measuring the CO levels to 1000ppm.USB datalogger with 8,000 records.Carbon monoxide (CO) is a poisonous gas that has no smell, color or taste. But it is very dangerous and reduces the oxygen-carrying capacity of blood that causes you unwell, illness and death. TM-802 CO Meter (datalogger) Features: - 4 digits backlit LCD with maximum 1, 000 counts. - Dual display of the readings for CO and Temperature. - CO range: 0 ~ 1, 000ppm. - Temperature range: -20~ 50 º C ( -4~ 122 º F ) . - Easy to calibrate at 100ppm or 500ppm. - USB datalogger with 8, 000 records( TM-802) . Carbon monoxide content in the air Inspiration time Symptoms and applicable standard 0-1 ppm Normal background levels. 9 ppm Maximum indoor air quality level. 35 ppm 8 hours The average exposure level per U.S. OSHA workplace standards. 50 ppm 8 hours The maximum average exposure of the U.S. OSHA workplace standards. 0.01%(100 ppm) 2~3 hours evacuate people from enclosed space if the CO concentration exceeds 100 ppm per OSHA exposure limit. Mild headache. 0.04%(400 ppm) 1~2 hours Headache occur in 2.5 hours to 3.5 hours. 0.08%(800 ppm) 45-min Dizziness, nausea, cramps(convulsions). 0.16%(1600 ppm) 20-min Headache, dizziness and will be dead within 2 hours. 0.32%(3200 ppm) 5~10 min Headache, dizziness, vomiting and will be dead in 30 minutes. 0.64%(6400 ppm) 1~2 min Headache, dizziness and will be dead within10 to 15 minutes. 1.28%(12800 ppm) 1~3 min Cause death. CO Datalogger TENMARS TM-802 à¤Ã×èͧÇÑ´ CO à¤Ã×èͧÇÑ´COẺºÑ¹·Ö¡¢éÍÁÙÅ à¤Ã×èͧÇÑ´á¡çÊ