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cupra

wrote:
Phil wrote:
You can get dedicated setpoint/temperature controllers (Omron/Redlion
to name but two) that do this for you without all the faff.

Thanks, but I don't really want a setpoint controller. The dedicated
product I require is a trip amplifier with user-adjustable setpoints
and response time.

I'd still have a look at process controllers - you may find that someone
does what you want without any programming (plenty of industrial processes
out there that work in a similar way, and they don't wany Joe operator
messing about with a PLC....)