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Posted by Old Sleeper on January 24, 2005 at 12:02:20:In Reply to: How do wire testers work? posted by How do wire testers work? on January 24, 2005 at 08:49:53:
Yep, if all you want to do is test that the EEG electrode (or any passive wire/electrode) does not have a break in it that would prevent it from transmitting signals, a plain old volt/ohmeter will work.
However, there are "testers" that also test the output of your sensors, like the resp effort belts, thermocouples, snore mics and sensors, that are more complex. The output from these other sensors are in the microvolt range and most "over the counter" voltohmeters don't have a scale that small (0.000001V = 1 microvolt).
I work at Pro-Tech, we do have one, called the ST 3, I know there are others out there. But the reason they usually cost more than a cheap voltohmmeter from Radio Shack is what they can do that those cheap things cannot. Hope this was not perceived as a commercial.
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