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In need of LPM

HitShane

HitShane

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Nov 30, 2012
Messages
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I am looking to buy any device (LPM) that will meter the output power of my lasers (New-Used). Need it to go up to 2W/+ Im not rich :) I hear about ones going for $100+ but can only find ones for $240+...

-Shane
 





Check out the Laserbee 2.5W USB! :beer:
If i recall corectly i got mine for about 150$ :)

Happy new year,
Jim :san:
 
kommed133 said:
Thanks for this. Looks just as good and way more affordable. Going to pick one up :thanks:
Click to expand...
Are you trying to say that this.....

basic_lpm_s.jpg



Looks as good as this....:thinking:

LB-A-2.jpg


I suppose you get what you pay for...:beer:


Jerry

You can contact us at any time on our Website: J.BAUER Electronics
 
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I would have gone for a laserbee too..

On the other hand, How is LB 2W LPM better than a 2W BF LPM ? They both are just as accurate , and have the same statistical deviation of 10% ?
 
Jerrys right you get what you pay for, I think the Laserbee is much nicer. Just my 2 cents...
 
Laserbee products are the best, and Jerry is always helpful for any information! I strongly recommend these LPMs :)
 
sjesper said:
Wow this looks really cheap. What's the catch.. Hmm!
Click to expand...

sinner said:
I would have gone for a laserbee too..

On the other hand, How is LB 2W LPM better than a 2W BF LPM ? They both are just as accurate , and have the same statistical deviation of 10% ?
Click to expand...

I'll try to answer your questions as you asked them..
This is what we know...

1) the LaserBee A has a True Zeroing control to Zero
the meter without needing to wait for the readings to
acclimate to the ambient test area air temperature
after a metering which could take anywhere from
60 seconds to 20 minutes to reach Zero.

2) the LaserBee A uses a split rail supply that allows
the Zero Control to actually Zero the reading after
a series of High Power Laser tests that a single supply
circuit is not able to do.

3) the Electronics of the LaserBee A are housed in
a high quality textured (anti-reflection) plastic enclosure.

4) the LaserBee A Electronics are mounted on a PCB.
(not sure of the other LPM since its electronics and
assembly have never been posted on the Forum)

5) the LaserBee A has a detachable Thermopile head
that makes it easier not to damage when storing.

6) the LaserBee A Thermopile Sensor is more protected
from scratches and damage since it is recessed in the
Thermopile Head.

7) the LaserBee A enclosure has a 9Volt Battery tray
with sliding cover.

8) The LaserBee A draws a mere 32mA from the 9Volt
battery. (not sure of the other LPM)

9) the LaserBee A enclosure measures a very small
4.00" x 2.50" x 1.50"

As to the 2nd part of the question...

How do you know...:thinking: Have YOU done those accuracy
comparison tests...

The LaserBee A follows our recently calibrated Newport
1825C LPM to within 5% of its range. Since it does not
use a microprocessor the accuracy depends largely on
the OpAmp... Thermopile Sensor and Broadband coating
of that sensor and the Accuracy of the LPM that it was
calibrated to.

Both of these LPMs can read a Laser to 2Watts and a
DIY LPM will be even less expensive on parts to build.

The choice is ultimately left up to the buyer...:beer:


Jerry

You can contact us at any time on our Website: J.BAUER Electronics
 
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I love my Laserbee and I highly recommend going with jerry on this. The Laserbee II deluxe comes in a nice sloped enclosure with rubber feet, its got data logging capabilities, the thermopile sensor is better protected like jerry said, plus the guy that designed and built it is a click away^^^. I've emailed bluefan twice with no reply. You could also just get a used ophir 20c head and a dmm.
 
lasersbee said:
I'll try to answer your questions as you asked them..
This is what we know...


How do you know...:thinking: Have YOU done those accuracy
comparison tests...

The LaserBee A follows our recently calibrated Newport
1825C LPM to within 5% of its range. Since it does not
use a microprocessor the accuracy depends largely on
the OpAmp... Thermopile Sensor and Broadband coating
of that sensor and the Accuracy of the LPM that it was
calibrated to.

Both of these LPMs can read a Laser to 2Watts and a
DIY LPM will be even less expensive on parts to build.

The choice is ultimately left up to the buyer...:beer:


Jerry

You can contact us at any time on our Website: J.BAUER Electronics
Click to expand...

I really dont wanted you to go into a lot of trouble explaining the high quality of LaserBee's since every one knows it ..

To my knowledge , It was 10%.. But its 5% now i know :beer:

For the other part that if I did any tests on my own, Well no.. I am not lpm manufacturer as you may know so it was just a silly question from you! :na:
 
lasersbee said:
I'll try to answer your questions as you asked them..
This is what we know...

1) the LaserBee A has a True Zeroing control to Zero
the meter without needing to wait for the readings to
acclimate to the ambient test area air temperature
after a metering which could take anywhere from
60 seconds to 20 minutes to reach Zero.

2) the LaserBee A uses a split rail supply that allows
the Zero Control to actually Zero the reading after
a series of High Power Laser tests that a single supply
circuit is not able to do.

3) the Electronics of the LaserBee A are housed in
a high quality textured (anti-reflection) plastic enclosure.

4) the LaserBee A Electronics are mounted on a PCB.
(not sure of the other LPM since its electronics and
assembly have never been posted on the Forum)

5) the LaserBee A has a detachable Thermopile head
that makes it easier not to damage when storing.

6) the LaserBee A Thermopile Sensor is more protected
from scratches and damage since it is recessed in the
Thermopile Head.

7) the LaserBee A enclosure has a 9Volt Battery tray
with sliding cover.

8) The LaserBee A draws a mere 32mA from the 9Volt
battery. (not sure of the other LPM)

9) the LaserBee A enclosure measures a very small
4.00" x 2.50" x 1.50"

As to the 2nd part of the question...

How do you know...:thinking: Have YOU done those accuracy
comparison tests...

The LaserBee A follows our recently calibrated Newport
1825C LPM to within 5% of its range. Since it does not
use a microprocessor the accuracy depends largely on
the OpAmp... Thermopile Sensor and Broadband coating
of that sensor and the Accuracy of the LPM that it was
calibrated to.

Both of these LPMs can read a Laser to 2Watts and a
DIY LPM will be even less expensive on parts to build.

The choice is ultimately left up to the buyer...:beer:


Jerry

You can contact us at any time on our Website: J.BAUER Electronics
Click to expand...
The Bluefan Basic LPM has one strong advantage: Price.

I think your point 3 is a bit funny, anti-reflection textured enclosure. The Newport 1825C is a nice little meter, I got one myself as well. What sensor do you have with it Jerry?

I'm busy doing my graduation assignment (And I was at CERN for a long time) so I may appear away sometimes but I'm picking up on things. For now I try to make power meters, in the future I hope to improve the design and provide some competition on the whole laser enthousiast LPM market but that may take quite a while.
 
I really like my Kenometer Pro + Ophir. but I dont think they available anymore. if you find one used, grab it. it has a lot of nice features. its all hand wired inside which has pros and cons. con is it doesn't look very good and MAYBE some noise might be introduced. but i doubt the latter is significant. you use it closed up so you dont have to look at the wiring. functionally its amazing with on screen graphing, very configurable and outputs to USB in real time. plus the Ophir sensor is pro quality. on the other hand I have no idea if these even come up that often. the laserbees are also good i understand but i never used one before so go with other people's comments on that model. plus the guy is canadian and thats a plus! :whistle:
 
The ophir heads are on ebay quite often. After that, many, many members have been able to build nice LPMs from them. IMO the response time of the ophir is the selling point.

Last I checked they were $195 just for the head. Not exactly cheap.

@OP - Just keep an eye out, 1-2 used LPMs pop up every couple of months in the ~$120 range.
 
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