FYI Power Meters

[Bill George]

Mahoney 100W, 200W & 500W CO2 Laser Power Meters are now listed on eBay or Amazon. Same thing different venders, both are shipped from China. Amazon limits the shipping to about $6, eBay shipping starts at $17 .
I ordered one 100 Watt model from Amazon ships in December.
11-14-14 Update email from vender said meter is shipping today from stock.
Granted this is not a $800 plus calibrated to NBS but should be pretty close, close enough to save a lot of "what if" questions about machine power issues.

[Dave Sheldrake]

Make one Bill,

Digital thermometer, $5 piece of scrap aluminium $1, a bit of paint $1

Details on a home build and the calculation you need

http://imajeenyus.com/optical/20130423_measuring_laser_power_thermally/index.shtml

Dr Lindsay Wilson a real Genius and really nice guy.

Cheers

Dave