Bad Breath Halitosis Forum

winter wrote: ↑Tue Feb 12, 2019 2:23 pmWhich gas sensor is the best from your experience?

Do you ask brand name or sensor type?
-Murat

StillHoping wrote: ↑Mon Feb 11, 2019 11:39 pm Dr, some people have noticed improvements after drinking sugar free pop/soda. There are some posts about club soda, I personally noticed improvements from drinking sugar free coke/diet coke during and after a meal . Any ideas why this could be? Could it be related to GERD? thanks

I dont know.
May be subjective improvements

-Murat

aydinmur wrote: ↑Tue Feb 12, 2019 6:00 pm

winter wrote: ↑Tue Feb 12, 2019 2:23 pmWhich gas sensor is the best from your experience?

Do you ask brand name or sensor type?
-Murat

Brand and type. The specific model. I might try to build one myself.

Dear Winter,
Probably you target to read H2S gas.
You can use a simple biochemical sensor such as MQ136, or better one from Figaro or better from alfa-Sense sensors, or better IndSci gas sensor.
I have published halitometer's electronic diagram in my text book "biophysics for dentists" (not English)
I taught to build halitometer dentists free of charge in my text book. It is not English.
Dont hesitate to ask me more when you need assistance
-Murat

Blue circle gas sensor. Red is voltmeter on the front panel. It works fine with 741 op amp.
Hope helps.
-M

aydinmur wrote: ↑Thu Feb 14, 2019 8:01 am





Blue circle gas sensor. Red is voltmeter on the front panel. It works fine with 741 op amp.
Hope helps.
-M

Images are not working.

It would be very helpful to be able to measure the BB when we try to pinpoint if a product/remedy makes any difference.
The MQ136 sensor costs about 30 USD. Im not sure what the other components would be/cost.

fog wrote: ↑Sun Feb 24, 2019 12:00 am Images are not working.

It would be very helpful to be able to measure the BB when we try to pinpoint if a product/remedy makes any difference.
The MQ136 sensor costs about 30 USD. Im not sure what the other components would be/cost.

Here some pictures from latest versions of the Halitor
I built this halitometer:




















I dont remember prices of sensors.
-Murat

aydinmur wrote: ↑Sun Feb 24, 2019 1:15 pm -Murat

winter wrote: ↑Wed Feb 13, 2019 3:43 pm I might try to build one myself.

Great, I made a thread here viewtopic.php?f=1&t=7405
To gather the information needed to build one.

aydinmur wrote: ↑Sun Feb 24, 2019 1:15 pm -Murat

Any idea how much measuring range PPM (parts per million?) the halimeter needs?

I can find h2s meters with sensitivity measuring range from 0-200ppm for the least expensive.

But maybe the sensor needs to be sensitive to measure PPB (parts per billion)?

fog wrote: ↑Mon Feb 25, 2019 5:56 pm Any idea how much measuring range PPM (parts per million?) the halimeter needs?
I can find h2s meters with sensitivity measuring range from 0-200ppm for the least expensive.
But maybe the sensor needs to be sensitive to measure PPB (parts per billion)?

First:
Measurement range is not problem. The problem is the resolution. it should be at least 0.1 ppm.

Second:
There is NOT a mathematical cut off value to diagnose halitosis.
Halitometers does not detect halitosis, but detects gases.

Third:
The H2S is not the unique gas of halitosis. There are more than 3400 gases in the human breath

- Murat

aydinmur wrote: ↑Mon Feb 25, 2019 7:39 pm First:
Measurement range is not problem. The problem is the resolution. it should be at least 0.1 ppm.

Second:
There is NOT a mathematical cut off value to diagnose halitosis.
Halitometers does not detect halitosis, but detects gases.

Third:
The H2S is not the unique gas of halitosis. There are more than 3400 gases in the human breath

- Murat

Yes thats why I was thinking of building my own, not spend so much on it if I find the measuring useless.

I found a commercial product, with 0,1ppm resolution.
https://www.amazon.co.uk/Hydrogen-Profe ... e+detector

What do you think?

Also what about humidity and heat from the breath interfering with sensor giving false measurement?

fog wrote: ↑Mon Feb 25, 2019 7:57 pm https://www. amazon . co . uk/.... What do you think? Also what about humidity and heat from the breath interfering with sensor giving false measurement?

This detector can not be used in the mouth if it has not an air pump ~500 ml/min
Not enough to diagnose if only H2S is measured. There is not a aritmetical limit between health and disease for h2s content of oral air.

Long matter. There are a lot of critical points to diagnose halitosis.
-Murat

Air humidity and temparature less affect oral gaz measurements. Cold and humid air is better than heat and dry air.
Practically these are very less important. Ignorable in clinic.
- Murat

Dear Murat,
My bad breath is totally of candida or fungal origin. As long I take flucanzole I am good... bad breath disappears for a couple of days on taking antifungals. I wonder if my diagnosis is correct or is flucanazole / antifungals are in some way altering the methyl compounds in my body.
Secondly, if bb is mainly because of methyl compounds is there some way to combat or absorb or adsorb these compounds.
Third, what do you think of mutation in SELENBP1. gene. Could most of us be carrying this mutation.

Dear Lovender,
Thank you for the question
Upto current date, nobody has postulated Candida or other fungi cause halitosis.
Zinc-chloride solution absorbs many odorous gases in the mouth cavity.
Gen mutation related malodor is very rare and very special condition that gives a lot of clinic symptoms together with malodor.
-Murat