Volume of a Lamotte BrewLab 4488 testtube?

[boist]

Hello out there, hoping that someone on the forum that owns a Lamotte BrewLab kit could do me a solid and tell me the exact volume that the 4488 testtube holds at 10 and 20ppm?
It's the one for the total hardness test, and it's the only one made of glass (which is why I'm asking this question, that thing doesn't hold up well to being knocked off the table... :smack: )
Thanks a lot!

 

[kmetzelaar]

Ha! I just broke mine today as well. Luckily the very bottom stayed intact so I could do a volume measurement before tossing it.

Using a pipet, I measured 3.5mL to the 20ppm line and 7 mL to the 10ppm line. This makes sense as 10ppm test should be double the volume of 20 ppm.