ULMResearch
Active Member
So yeah, I finally got me a cheapo digital pH meter. A Milwaukee pH600. I heard they were one of the better options for cheap meters and at 20 bucks shipped, how could I pass?
After getting it I wanted to make sure it worked well enough for my needs. All I had on hand was some milk, some windex, some ozarka drinking water and my tap.
I did some research and looked at some MSDS and found that these items can be used to test a meter's accuracy.
Fresh, cold milk should have a pH of ~6.7.
Windex with Ammonia should have a pH of ~10.6. Mine would fluctuate 10.5-10.6. This may depend on age, contamination, temp, etc.
Ozarka drinking water has a pH of ~7.25 (since my meter only does tenths I got 7.2-7.3 as I stirred the water.
Oh and my tapwater sucks. ~400ppm and a pH of 8.2-8.4. The company reports a pH of 7.9 at the source so I can believe it via picking up scale in the miles and miles of piping.
Using these common items you can find out how accurate your meter is. Don't calibrate anything by these under any circumstances however.
After getting it I wanted to make sure it worked well enough for my needs. All I had on hand was some milk, some windex, some ozarka drinking water and my tap.
I did some research and looked at some MSDS and found that these items can be used to test a meter's accuracy.
Fresh, cold milk should have a pH of ~6.7.
Windex with Ammonia should have a pH of ~10.6. Mine would fluctuate 10.5-10.6. This may depend on age, contamination, temp, etc.
Ozarka drinking water has a pH of ~7.25 (since my meter only does tenths I got 7.2-7.3 as I stirred the water.
Oh and my tapwater sucks. ~400ppm and a pH of 8.2-8.4. The company reports a pH of 7.9 at the source so I can believe it via picking up scale in the miles and miles of piping.
Using these common items you can find out how accurate your meter is. Don't calibrate anything by these under any circumstances however.
