In message , Tim Williams
writes
"Ian Jackson" wrote in message
...
You can probably make the needle move simply by staring hard at it!

I have one which is 1mA FS, but it's only 70 ohms. It's sensitive enough
that rubbing my finger across the faceplate generates enough static to
bounce the needle everywhere. The scale is calibrated for a type K
thermocouple, IIRC.

But that's not 'sensitivity' (in the sense of sensitivity to current).

I have a large 'edge-scale' meter (from a German WW2 aircraft). The
scale is about 6" long. I managed to break the 'bay window' shaped
glass, and replaced it with one made from plastic (thin perspex, I
think). It really IS static-sensitive. A gentle rub on the face of the
plastic, and the needle gets well and truly pinned at any reading you
want. It will stay there for hours. Like this, the meter is essentially
useless. A quick 'harr' on the face releases it.
--
Ian