FEU84-5 ФЭУ-84-5 PMT photomultiplier tube for gamma spectrometry

I’ve bought a couple of FEU84-5 PMT’s from an eBay seller. I’ve bought because of an occasional low price and because I heard that this tube is very good for gamma spectrometry.

Photocathode -  antimony-potassium-sodium-cesium
Optical input - front
The diameter of the working area of the cathode - 25mm 
The number of amplification stages - 12
Wavelengths of maximum sensitivity  -   420-550 nm green light
Dark current  -   < 50 nA
Sensitivity of the photocathode   -   < 80 mkA/lm
Anode sensitivity, A/lm - <80
Life time   -   more than 1000 hours
Maximum Ratings :
Max Voltage -  1900 V
Max anode current - 5 micro A
FEU84-5 and it’s datasheet

It comes into a cardboard envelope with some sponge that starts to disintegrate after 30 years of storage. Nothing to complain… some paper and alcool and I’ve cleaned the tube.

FEU’s box
FEU’s sponge :3








This version of the tube doesn’t have a socket, it have just some teflon insulated wires. This is not bad…there is no need to buy a proper ceramic socket.

End wires
FEU front window

Click to download


3 thoughts on “FEU84-5 ФЭУ-84-5 PMT photomultiplier tube for gamma spectrometry”

  1. Hello! I’m at work surfing around your blog from my new iphone! Just wanted to say I love reading through your blog and look forward to all your posts! Carry on the outstanding work!

  2. Hey There. I found your blog using msn. This is an extremely well written article. I’ll make sure to bookmark it and return to read more of your useful info. Thanks for the post. I’ll certainly comeback.

Leave a Reply

Your email address will not be published. Required fields are marked *