â·ÃÊͺ¶ÒÁÃÒ¤Ò Handheld C02 & TEMP, meter 7752 Low cost portable meter checking poor indoor air quality in office, Dual display 2 parameters simulatneously:co2, temperature, Warning carbon dioxide level, Big lcd display with high resolution, Design with ndir (non-dispersive infrared) waveguide technology sensor, Manual calibration is recommended à¤Ã×èͧÇÑ´ÊÀÒ¾ÍÒ¡ÒÈã¹Ëéͧ à¤Ã×èͧÇÑ´¡êÒ«¤ÒÃìºÍ¹ä´ÍêÍ¡ä«´ì Handheld C02 & TEMP, meter 7752 Low cost portable meter checking indoor air quality Big dual display lcd with 2 parameters Simultaneously: c02 temperature Design with ndir (non-dispersive infrared) Waveguide technology sensor Manual calibration is recommended Warning carbon dioxide level Backlight function for working in dark Long time drift compensation Audible alarm (-80db) threshold setting Max ,min, average functions included Rs232 output every 2 seconds to pc for analysis Hold function freezes current readings Display 8 hrs twa value (time-weighted average) Or 15 minutes stel value (short-term exposure limit) Housing designed surrounds with rails to help Air ventilation for quick and accurate response Easyto calibrate at fresh air around 380-420ppm Specification: CO2 Range : 0-9999 ppm ( 2201-9999 ppm out of scale range) * Temp. : -10 - 60° C ( 14-140° F) * Resolution : 1ppm, 0.1° C/ ° F * Accuracy CO2 : + - 50 ppm -+ 5% of reading ( 0-2000 ppm) * Accuracy Temp. : + -0.6° C/ + -0.9° F * Warm up time : 30 s * respone time : CO2 7752 AZ Instrument CO2 Meter à¤Ã×èͧÇÑ´CO2 à¤Ã×èͧÇÑ´¡êÒ«¤ÒÃìºÍ¹ä´ÍçÍ¡ä«´ì à¤Ã×èͧÇÑ´¤Ø³ÀÒ¾ÍÒ¡ÒÈ