The cartridge looks like a Solo ES3
cartridge, is this the same cartridge?
No. Despite their physical similarities Testifire
XTR2 uses a unique smoke cartridge. The new 
TES3 cartridge features a larger test capacity
providing 800 bursts of smoke and can be
purchased in packs of 12 from Detectortesters
or your local authorised retailer
(Part No. TES3-3PACK-001, TES3-6PACK-001)

Can you use the Solo ES3 cartridge in this

tester?
Yes. Solo ES3 smoke cartridges can be used in the
Testifire XTR2 you would get the same test capacity
as when using the cartridge in a Solo 365.

How many tests do you get from TES3
cartridges before they need replacing?
TES3 cartridges can deliver 800 bursts of smoke
giving the ability to test an average of 500 detectors.
Testifire XTR2 will inform you when the smoke
cartridge should be changed and the DT Connect
App will give an accurate percentage reading of
remaining life

Can I use my existing Testifire smoke 
capsules?
No. Testifire XTR2 uses a unique smoke
cartridge and is not compatible with older
TS3 capsules