On 14/11/2020 20:54, michael adams wrote:
But if you clip it on to a CH pipe or domestic hot water pipe the reading will be
around 70C.
I'm quite prepared to believe you. But then why have thermometers that go up to 120C
if there's no need ?

What does it matter? What does it ****ing matter?

I'll expand on what I said before. I started installing TV aerials as a
full time job in 1971, after working part time for five years. Over the
following five decades my business expanded to include domestic and
commercial satellite reception, CCTV, private mobile radio, broadcast
radio transmission aerials, and very large RF distribution systems. In
all that time, with that wealth of practical experience, I never once,
never ever, not once, ever, encountered a length of coax that had been
adversely affected by being in contact with a hot pipe. So does that put
your mind at rest?

Bill