Math problem need help with figuring out %

Christopher

Moderator
Need some help with this math problem.

I will be checking the draw amount in ounces of what my injector pulls out of a measure pitcher and I can calculate the % of water to chemical ratio.

Using bleach as the chemical and supposing it is 12% (not sure how fresh it is and just going by 12% right now), once I have the draw ratio of how much chemical was pulled through the injector, how do I calculate the % strength of bleach that hit the surface?

Example, starting out with 12% bleach mix, pulling x ounces through the injector I am getting 0.7% bleach mix hitting the surface. I will try another injector to see if it pulls a better stronger mix to hit the surface.

I am trying an experiment here to see what % of bleach mix hits the surface and checking how long it takes to clean and then will try it again with the next drum of bleach to see how much fresher cleans faster and will also check the ratios again.

Not sure if I am thinking correctly on how to do the numbers here but just would like to know what the % strength of bleach mix is hitting the surface once I have the ounces pulled through the injector and do the math with the 8gpm machine.

This is just for my own curiosity and an experiment.

Thanks for any help.
 
This should be good!
 
Need some help with this math problem.

I will be checking the draw amount in ounces of what my injector pulls out of a measure pitcher and I can calculate the % of water to chemical ratio.

Using bleach as the chemical and supposing it is 12% (not sure how fresh it is and just going by 12% right now), once I have the draw ratio of how much chemical was pulled through the injector, how do I calculate the % strength of bleach that hit the surface?

Example, starting out with 12% bleach mix, pulling x ounces through the injector I am getting 0.7% bleach mix hitting the surface. I will try another injector to see if it pulls a better stronger mix to hit the surface.

I am trying an experiment here to see what % of bleach mix hits the surface and checking how long it takes to clean and then will try it again with the next drum of bleach to see how much fresher cleans faster and will also check the ratios again.

Not sure if I am thinking correctly on how to do the numbers here but just would like to know what the % strength of bleach mix is hitting the surface once I have the ounces pulled through the injector and do the math with the 8gpm machine.

This is just for my own curiosity and an experiment.

Thanks for any help.

I use disposable test strips to test % of SH. I have some that test up to 1% so they work for testing my downstream ratios if I switch hose length or injectors. Accurately measure .25% to 1%
 
I use disposable test strips to test % of SH. I have some that test up to 1% so they work for testing my downstream ratios if I switch hose length or injectors. Accurately measure .25% to 1%

Nick, where do you get those, cost, etc?
 
Nick, where do you get those, cost, etc?

I would like to know as well. I thought the ones from a pool place were only good at measuring a large mass of water.
 
Test strips are used by health inspectors in the food industry to insure sanitizer solutions are at correct levels. They test for lower Sh levels but, I found some that test higher, up to 1%. I think they are used in hospitals.

strips.jpeg

http://www.indigo.com/

Less than $20.00. You need to make sure they read up 10,000 ppm.

10,000 ppm = 1% SH
5,000 ppm = .5% Sh
An so on....
 
Russ, if I measure the amount pulled out of the measuring pitcher, how do I do the math to see what % hit the surface?

Not sure if I will be using the 8gpm or 5.5gpm.

I am not following the math here and then to get the % of bleach hitting the surface after the ratio of the chemical pulled is calculated, could you explain more please?

Thanks.
 
Bump.
 
Thanks Russ, I really appreciate it.
 
Got distracted by work and have not gone back to experimenting, maybe soon.

I was going to try to see what strength of the SH was hitting the surface, just out of curiosity to compare it to results of hitting the surface with a known percentage like with an electric or air powered pump. Had some ideas.
 
Take the oz / min drawing out of the container and divide by the oz / min flow of the machine. Multiply bleach strength (12.5%) by that number.
Russ
If the bleach is cut to say 50/50 [SH/H2O ] does this then make the bleach strength multiplyer 6.25%.?
What would you consider to be the ultimate SH% to achieve on the building.?
 
Got distracted by work and have not gone back to experimenting, maybe soon.

I was going to try to see what strength of the SH was hitting the surface, just out of curiosity to compare it to results of hitting the surface with a known percentage like with an electric or air powered pump. Had some ideas.
How's the testing going Chris?
 
Too many issues going on right now, family sick, I am sick, diesel truck engine locked up, and more. The experimenting will wait for a while unfortunately.

Have you done any experimenting or testing to see what results you get?
 
Not yet however I am taking some notes from what others are doing and I am putting together some test criteria. I plan on starting some testing soon with the equipment I have. My problem is I hate math and was never a good math student. Even running multi million dollar construction projects was always hard for me. I'm glad I had a calculator and we had qualified engineers on jobs! LOL We'll see how this goes. I hope you and your family get to feeling better Chris. Will Pray for you all.
 
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