GMT GT2.5 meter

by johndoe2011 on Sat, 22/12/2012 - 21:22

Hello,
Is the following meter compatible with any on the sensor (gas) or optical ?
http://imageshack.us/photo/my-images/713/gasmeter.jpg/

There is a small mirror on the 6 digits but I would prefer using a reed switch
Thanks

gebhardm | Sat, 22/12/2012 - 21:58

The type sign says "1 imp = 0.01" - this indicates that there indeed is a pulse output - the flat something underneath the wheels may be the place to place the pulse sensor; reed switches work magnetically, so, as told so often, try with a compass on turning wheels if you see a change... - if yes, you may go with a reed switch; be experimental...

johndoe2011 | Sat, 22/12/2012 - 22:03

Thanks a lot !
Would it be better to go for a flat reed switch (or sensor) or is it better to go for a hall sensor ?

gebhardm | Sun, 23/12/2012 - 13:37

Go for a reed switch first as a hall sensor requires an extra power supply, thus more than just two wires; 2Eur (Reichelt) should be not too much even when changing to a hall sensor later on; you might also use a video camera with a digit recognition system ;-)

on3ptz | Sun, 23/12/2012 - 15:27

This meter has magnetic readout , there is a place to fit a magnettic sensor on the bottom of the digits.