Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers



LPM Needed

biddy79uk

Member
Joined
Jul 6, 2013
Messages
92
Points
8
Hi Guys,
Just wondering where the "cheapest" place is too buy a LPM
Any ideas & sugestions feel free to leave links/names

Cheers John :thanks:
 



Blaster

New member
Joined
Jul 1, 2013
Messages
1,172
Points
0
Well i will probably have mine for sale as i intend on buying the new one Trevor and ARG have just completed. PM if interested i do have one member who is thinking on it for a day in front of you.
 

biddy79uk

Member
Joined
Jul 6, 2013
Messages
92
Points
8
Nice Item But Just Not For me Sorry Blaster Pal :)

EDIT:

Didnt realise how much these LPM's were guys sorry.... :(
 
Last edited:

tmackbb4

Banned
Joined
Aug 9, 2013
Messages
522
Points
0
I'm in the same boat but in the states. If anyone is looking to upgrade to the new 10x I'd be open to picking up your old one.


500 Posts!
 

Blaster

New member
Joined
Jul 1, 2013
Messages
1,172
Points
0
Well they arnt cheap but usually they are a buy, use and that's it .No maintenance ...
tmackbb well done
on 500 posts and class 2 M laser :worthy:
 

NKO29

Active member
Joined
Jun 6, 2013
Messages
870
Points
28
IDK how you would even calibrate a LPM tbh... You couldn't simply just compare it to another and tweak it, because if you keep doing that all of the lpms will become more and more out of whack!
 

andrewb

Active member
Joined
Sep 7, 2011
Messages
144
Points
28
The best way to get a quality LPM for relatively cheap is to buy an Ophir sensor off of eBay, and use it along with a DMM and two 9V batteries to make an LPM. Here is what you want to buy:

Ophir Laser Measurement 20c A 1 Y Sensor Laser Power Meter LPM 1706111 New | eBay

This sensor outputs 1mV per mW of measured laser power. Therefore you just have to use a cheap DMM to measure the voltage signal from the sensor, and that's your LPM. There are many threads about this method, just search the forum for 'ophir'.

The ophir sensors have a very fast response time (<1s), are very accurate, and many forum members have them. (They can also be used with other LPM systems, if you ever decide you want a dedicated LPM that does data logging, etc, in the future.)

There are ways to get slightly cheaper LPMs (e.g., $100-$200), but IMO these are not really worth the savings, as they use a different kind of sensor (TEC), which has a slower response time, which means you have to wait upwards of 30 seconds before you get an accurate reading. It's worth spending a few more bucks to get an Ophir, IMO.
 

Blaster

New member
Joined
Jul 1, 2013
Messages
1,172
Points
0
IDK how you would even calibrate a LPM tbh... You couldn't simply just compare it to another and tweak it, because if you keep doing that all of the lpms will become more and more out of whack!
question ive been meaning to ask Trevor i know mine is about 2.% out as all the data info i get from other people before i get a laser shows this its only 2% but if a tweak was do able i would like to know at the moment i just add 3 mW up to 100mw add 20 mW up to 1 watt and 40 mW up to 2 watt and that makes mine same as other data log pages i get trivial but tiny bit annoying.
 




Top