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Massive Selection for Pm2.5 Monitor With Rs485 - Popular carbon dioxide monitor in wall mounting or desktop for schools and offices – Tongdy
♦ Real time monitoring room carbon dioxide ♦ NDIR infrared CO2 sensor inside with special Self Calibration. It makes the CO2 measurement more accurate and more reliable. ♦ More than 10 years lifetime of CO2 sensor ♦ Temperature and humidity monitoring ♦ Three-color (Green/Yellow/ Red) LCD backlight indicates ventilation level -optimal/moderate/poor based on the CO2 measurements ♦ Buzzer alarm available/disable selected ♦ Optional display 24h average and max. CO2 ♦ Provide optional 1xrelay out...