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Old 03-04-2017, 12:26 AM #33
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Default Re: No access to any LPM owner; what's the most accurate and easiest to make DIY LPM?

I thought about making one from a DIY post but I'd rather just save a little and get an accurate and reliable one from Lasersbee or Hyperion.


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Old 03-09-2017, 08:58 PM #34
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Default Re: No access to any LPM owner; what's the most accurate and easiest to make DIY LPM?

Quote:
Originally Posted by lasersbee View Post
Actually the TEC/peltier in the seebeck configuration
is not used as a temperature sensor for LPMs.
It is used as a differential voltage sensor between the
front and rear plate's differential temperatures.

Jerry
I am sure that the terms of "temperature sensor" would be more understandable for a beginner
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Old 03-10-2017, 02:04 PM #35
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Default Re: No access to any LPM owner; what's the most accurate and easiest to make DIY LPM?

Quote:
Originally Posted by astralist View Post
I am sure that the terms of "temperature sensor" would be more understandable for a beginner
It will only confuse a beginner into thinking
a thermometer is a Laser Power Meter Sensor
which it is not...

Jerry
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Old 03-12-2017, 01:08 AM #36
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Default Re: No access to any LPM owner; what's the most accurate and easiest to make DIY LPM?

Well, it essentially is, at least when it measures the difference in temperature across a known thermal resistance, very similar how you would use a voltmeter with a shunt of known electrical resistance to measure current.

The problem is mostly that 'known thermal resistance' which you cannot purchase like a know electrical resistor you can use as a shunt to measure current by looking at the voltage across it.
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