Recent content by BelSplash

No, they don't. If they require calibration they're already broken and should've been checked earlier. There can be a degradation of the light source, optical filter or sensor, but that would lead to a reduction of sensitivity, not inaccurate readings (ie high one time, low the next). To TS, I...

That pack of toilet paper rolls. :ROFLMAO:

I had my first AstraZeneca shot last week. Muscle pain and headache the day after, but I went about my business with a good dose of paracetamol. The effects subsided late in the evening, as quickly as they came in the morning. Sensitive spot on the arm for several days. Second shot will be in...

I have a Lovibond Scuba II, that's what I do to test chlorine when levels are above the 6ppm upper limit. Even with pipetting, dilution, measuring and rounding errors I expect to be within 1 ppm error margin. (Certainly good enough for an Intex AGP which is only filled for 5 months.)

Nice gimmick, but I'd just use the graduations on the tube tbh.

Sounds like you have two pool stores that are capable of giving reliable results at least some of the times. Of course, you don't know if all employees are equally capable, or correctly calibrate before testing. Furthermore, going to the pool store amounts to the same thing as taking samples to...

Well, if you have a multi-million dollar lab setup at work, you should understand the chemistry involved, or at least realize you should listen to people who understand the chemistry. I work in a lab myself, and although we don't have a multi-million dollar ISO-certified setup, I know that...