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01-10-2003, 04:10 PM #1
Temperature controller which operates down to -100C/-150F
For my cascade I am looking for a temperature controller which allows sensor temperatures down to -100C / -150F.
Ideally it would have the following features:
- Temperature range -100C .. +50C (-150F .. +120F) or better.
- Single 220V / 15W capable relay output or better
- Setup for compressor cut-in and hysteresis
- Supply 12 VAC/VDC, 24 VAC/VDC or 220 VAC
- Short-cycle protection would be a nice feature.
- Pt100 sensor inputs are preferred.
I am quite fond of the Eliwell controllers (I'm using the EWPC-901 in the high stage), but I haven't found any which goes below -80C.
Of course, I can design/build one myself, but it wouldn't be better than off-the-shelf stuff. It only takes a lot of time.
Which controller would you recommend?
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