Why don't we use the whole vial of regent for testing in the Mastertronic?
This question is asked a-lot, that we get a refill warning for the regent when we get to 7mil in the vial and you ant bypass it?
The reason is very practical!
- We have a stir bar in the vial for keeping the heavy/thick regents suspended
and if we let the needle go down past the 7mil, the needle could hit the bar and bend.