Colour Codes for Vacuum Gauges on Medical Devices?

S

SteveK

#1
I’ve searched standards, the net etc to no avail. Has there ever been guidance, a convention or a standard to distinguish vacuum levels on an analogue vacuum gauge? For example black markings/needle on a yellow background for High Vacuum, yellow markings/needle on a black background for Low Vacuum etc. Or if not for medical devices, then for gauges used in any other applications.

Bit of a long shot.

Steve
 
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S

Sturmkind

#2
SteveK;

The only differentiation I have ever run across was for Yellow background = metric, green or white = Imperial units.

The manufacturer may be able to customize to your requirements and then you could set the standard be for instrument discrimination or range!

Best of luck!
 

rob73

looking for answers
#3
Hi Steve
I think it is probably an historical thing, BS5682 gives yellow as the colour code for vacuum (hose and probe) so why not the face of the gauge? I do know in Japan for instance they use white gauges as white is the colour associated with vacuum there, (yellow is oxygen I think).As you are probably aware ISO 10079 only gives guidance on the size and scale of the graduations and not colour. I would say it is down to the manufacturer to justify the choices they make. The other thing with colour is, what do you for the users if they are colour blind??
Rob
 
#4
I came across something in NFPA99, which is the US standard for health care establishments so is more concerned with the building systems.

But from that:
Medical surgical vacum - white background / black text
Waste anaesthetic gas disposal - violet background / white text
Lab vacum - White black checkerboard background / black boxed text.

But I also have a note that US and Canada gas hoses have conflicting colours so that all may not be universal.
 
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