<p>Carbon dioxide sensor principle: using the principle of non- infrared absorption</p> <p>Carbon dioxide measurement range: 400-5000ppm, resolution: 1ppm</p> <p>Carbon dioxide measurement accuracy: 50ppm, or 5%</p> <p>Carbon dioxide detection refresh frequency: 1 second</p> <p>PM2.5 detection range: 0-500g\/m3</p> <p>PM10 detection range: 0-500g\/m3</p> <p>PM2.5\/10 sensor principle: The particle dust sensor is a laser principle</p> <p>Temperature measurement range: -20-60; 2</p> <p>Humidity measurement range: 5%-95%RH;5%RH</p> <p>Operating temperature: -10-50</p> <p>Operating humidity: 0-95% (non-condensing)</p> <p>Temperature and humidity sensor: dedicated ASIC sensor chip, high-performance semiconductor silicon-based electronic humidity sensor and a standard on-chip temperature sensor</p> <p>Transfer voltage: DC6V-DC36V, or POE power supply</p> <p>Due to different batches, there may be differences in product appearance and printed text, which will not affect use</p> <p>Colour:Black</p> <p>Material:ABS</p> <p>Package Contents:</p> <p>1 * detector</p> <p>Only the above package content, other products are not included.</p> <p>Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.</p>