The Extech air quality data logger SD800 simultaneously indicates carbon dioxide, temperature and relative humidity on the LCD screen. The measured data is then stored on an SD card. The recording is completed with date and time stamp in Excel format for easy transfer to a computer. * Checks for Carbon Dioxide (CO2) concentrations * Maintenance free dual wavelength NDIR (non-dispersive infrared) CO2 sensor * Triple LCD simultaneously displays CO2, Temperature and Relative Humidity * Measurement ranges: CO2 - 0 to 4,000ppm * Datalogger stores readings on an SD card in Excel format for easy transfer to a PC * Dimensions: (W x H x D) 80 x 132 x 32mm * Power supply: 9V AC adaptor 6x AAA (UM4) 1.5V batteries for clock. * Indicated sampling rate: Approx. 1 Second * Operating temperature: 0°C to 50°C * Recording sampling rate: 5/10/30/60/120/300/600 Seconds or Auto. * Type (manufacturer type): SD800 * Weight: 240g * Supplied with 6x AAA batteries, 2G SD card, universal power supply, 3x temperature sensors and mounting bracket https://elecena.pl/product/27754366/extech-sd800-co2-humidity-and-temperature-data-logger 2025-01-24 https://elecena.pl/product/27754366/extech-sd800-co2-humidity-and-temperature-data-logger 2025-03-25 https://elecena.pl/product/27754366/extech-sd800-co2-humidity-and-temperature-data-logger 2025-05-24 https://elecena.pl/product/27754366/extech-sd800-co2-humidity-and-temperature-data-logger 2025-06-12 https://elecena.pl/product/27754366/extech-sd800-co2-humidity-and-temperature-data-logger 2025-07-21 https://elecena.pl/product/27754366/extech-sd800-co2-humidity-and-temperature-data-logger 2025-08-31 https://elecena.pl/product/27754366/extech-sd800-co2-humidity-and-temperature-data-logger 2025-11-01 https://elecena.pl/product/27754366/extech-sd800-co2-humidity-and-temperature-data-logger 2026-01-08 https://elecena.pl/product/27754366/extech-sd800-co2-humidity-and-temperature-data-logger 2026-02-25 https://elecena.pl/product/27754366/extech-sd800-co2-humidity-and-temperature-data-logger 2026-03-20