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  • 27/02/2017

    Hi All, It can be hooked up to a simple usb/serial converter (only 4 wires required). Make sure the data lines (Tx and Rx) use 3V signalling. Running a simple powershell script the data is displayed. Script: [Byte[]] $request = 0xff, 1, 0x86, 0, 0, 0, 0, 0, 0x79 [Byte[]] $res = 0, 0, 0, 0, 0, 0, 0, 0, 0 $port = new-Object System.IO.Ports.SerialPort COM57,9600,None,8,one $port.Open() $port.Write($request, 0, 9) Start-Sleep -Milliseconds 50 For ( $i = 0; $i -lt 9; $i++ ) { $res[$i] = $port.ReadByte() } Write-Host "CO2: $($res[2] * 256 + $res[3]) ppm, Temp: $($res[4]-40) C" $port.Close() Display: CO2: 876 ppm, Temp: 24 C If you try it, please set the port parameter (COM57 in my case) according to your system. Bleph

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  • 22/12/2018

    Is it a fiber fabry perot interferometer that exploits the absorption of the infrared ray of CO2 ? Is it necessary to remove the protective film on both sides of the sensor before use?

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