I bought this cool LPM head on ebay: G179530 Coherent LM-100 Laser Power Meter Head w/ Fitted Case | eBay
Now, I am trying to find the model number of the meter used with it and not finding which one yet, it uses a DB15 connector, A photo of the calibration paperwork which comes with it shows it is a LM-100 thermopile head which is used with a Coherent 201 meter, but when I research that meter, it uses a BNC connector input, not a DB-15. If I can't use it as a thermopile, I might just core it out and use the heat sink for a laser project.