Mercer comparator gauge repair help.

[Graeme SeedParticipant @graemeseed34272]

Many thanks Pete, very informative. I’ve subscribed to his channel.

[Graeme SeedParticipant @graemeseed34272]

Hi John, I’m very interested to buy, Graeme.

[Robert Atkinson 2Participant @robertatkinson2]

One reason that these instruments and their makers have disappeared is that the technology has been superceeded. One major problem with them is that there is no direct way to get an electronic output that can be used for automated measurements. Yes, you could put a camera in front of it and extract the readings. But when automatic data recording first started that was not possible.
The alternatives are LVDTs (linear variable displacement transformers) and laser interferometry or displacement.  I’ve used both professionally and personally have an older Solartron DR600 display and DP10 (0.5um) probe. The current probes are accurate to 0.1um and repeatable to 0.05um with 0.01um resolution. I also have old Heidenhain analog LVDT and display which is very sensitive but I’ve no information on.

Robert.

[John HaineParticipant @johnhaine32865]

Graeme, I sent you a PM.

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