No access to any LPM owner; what's the most accurate and easiest to make DIY LPM?

[Richie89]

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.

 

[Astralist]

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

 

[lasersbee]

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...:yh:

Jerry

 

[Benm]

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.