Whats a good portable chronograph?

Check out ali-express. Cheap Chinese chrony that attaches to barrel with paded clamps. Infra red works in any lighting condition. Lightweight & only $20.00 + shipping ($3.00). Reads in meters/sec but easy to convert. I have one coming my way. Several good reports. Might be worth a try. 

If you have the right kind of barrel, check out the Combro. It's about $65 US including shipping. It straps onto the end of the barrel or moderator, so the barrel has to be even for the last 3 or 4 inches so the chrony will rubber band on. I have one and it works great. I also have a Caldwell and it works great as well. Combro is great for throwing in the bag and testing once you get to your destination. No fancy setups

I second the Combro I got mine on British eBay . 

I use this one and works just fine

https://www.ebay.com/itm/1PCS-Hunting-Chronograph-Shooting-Speed-Tester-X3200-Chrono-Airsoft-BB-Shooting/183242204353

Just looked at that FX. Idea on their new chronograph. That thing is the chit! As portable as portable gets. Need to find out how many $$!

https://www.youtube.com/watch?v=Ry5XvTHajas

According to this video it will be available late 2019 and price will be less than $200. Also it is not meant for powder burners.

I was looking at the ACETECH AC6000 on Amazon as a compact portable chrono. I’m going to wait for the FX radar now, perfect for the range or the house, nice and compact and not light sensitive.

Jajajaaa edosan. I`m owning the same like you. It was working for 70-80 shots and then stopped measuring with my airguns.

However, it still works, but only with the yellow BB airsofts.