Chromatography Forum

I found an old DIY paper on the subject (A Simple-to-Build Thermal-Conductivity GC Detector, from J. Chem Ed in 1994), but I was hoping for a rather more sensitive detection method. That paper uses a 1N914 signal diode, while I'd prefer to make one using rhenium/tungsten wire for sensitivity purposes.

Anyone ever go about this? I'd be interested in details.

osp001,

What do you want to measure? How hot? Look at thermistors. Small, very sensitive but only at low temperatures and NO, NO to hydrogen.

Be aware that tungsten/rhenium versions are highly coiled to get sufficient resistance to get decent current drop.

Best regards,

AICMM