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  1. sbuckingham

    N2 to Modbus Multidrop?

    Hello, I'm currently working with a Johnson DX-9100-8454 PLC unit and am trying to interface it in a multi-drop style Modbus RTU network. Problem is, the only RS-485 protocol on the PLC unit is an N2 bus, which I believe is proprietary to Johnson Controls. Spoke with one of their application...
  2. sbuckingham

    Need a high-temperature CO2 and O2 analyzer

    Hi all, I was wondering if anyone could point me towards a good manufacturer for in situ CO2 and O2 analyzers. I'm having trouble finding any suitable for my process temperature (~400C, mostly N2 gas). Most I can find are either <100C or >600C. Looking to measure around 0-1000 ppm CO2 and...

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