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Old 02-05-2016, 04:48 AM #1
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Default LPM Inquiry (0.1 or 0.5 mW measurements?)

Hey everyone!

New member here, I've spent the last couple hours looking through here and am learning a ton but haven't found a specific answer to a question I had.

I'm in need of an LPM, but I haven't purchased one before and don't know too much about them. I was hoping this forum could lend their expertise.

My requirement:

Precise Measurements: 0.1 mW measurements would be awesome, as I'll be dealing primarily with lower output lasers. However, I don't know if this is feasible for commercial units. What LPM's have the most precise units of measurement for mW?

Many thanks!


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Old 02-06-2016, 12:44 AM #2
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Default Re: LPM Inquiry (0.1 or 0.5 mW measurements?)

I don't know anyone here who has an LPM that can read in tenths of mW. That doesn't mean that someone else might not know of one though. Good luck and welcome to the forum +REP to get you started.
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Old 02-06-2016, 12:47 AM #3
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Default Re: LPM Inquiry (0.1 or 0.5 mW measurements?)

There's a commercial pen-stick LPM that has that range and sensitivity, I can't remember the name now. I think it may have been from SpectraPhysics.
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Old 02-06-2016, 01:22 AM #4
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Default Re: LPM Inquiry (0.1 or 0.5 mW measurements?)

^Coherent lasercheck. I've got one. It reads down to a microwatts with ease.
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Old 02-06-2016, 10:20 PM #5
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Default Re: LPM Inquiry (0.1 or 0.5 mW measurements?)

Wow, that sucker is really sensitive and $450 list on the site.
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*Jayrob Star Trek Phaser*
# of Lasers - ***
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# of Batteries - ***
Wavelengths - 405, 445, 447, 450, 455, 462, 464, 470, 473, 473+, <515, 515, 520, 532, 589, 635, 638, 650, 660, 685, 808, 830, 980
Projector - PD2
O-Like mini red/green to yellow module
Beam Expanders - Dragon Lasers 2x & 5x with universal adapters
LPM's - Modified AW TEC, Custom 6.8W+ Ophir
Datalogger - ARG
Chargers - Ultrafire WF139, (2) Xtar WP2, Nitecore i2, UM20, (3) i4, (2) D4 , Opus BTC-3400 V2.2
Phlatlights - Jayrob PT-54 green 1000lm maglight, PT-54 red project box build, (3) PT-54 red, (2) PT-54 orange (3) PT-121 red, (2) PT-121 blue, (1) PT-121 green project work in progress 5000lm (1) PT-121 green

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Old 02-06-2016, 10:33 PM #6
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Default Re: LPM Inquiry (0.1 or 0.5 mW measurements?)

I have one I'd probably part with.
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Old 02-06-2016, 10:50 PM #7
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Default Re: LPM Inquiry (0.1 or 0.5 mW measurements?)

You'll need an optical LPM, as suggested the Coherent Lasercheck is good.

Thermal LPM's are too sensitive to the environment for those powers.
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