Three major halitosis components are hydrogen sulfide, methyl mercaptan, and dimethyl sulfide. The OralChroma measures Volatile Sulfide Components (VSC) in the breath and separates them into the above three components.
About 1700 sets of OralChroma have been supplied to dentists, universities, and laboratories in the world since 2002.

*OralChroma is a registered trademark or a trademark of Nissha Co., Ltd..



Separating halitosis into three major components with high precision

orc_pic01Since the OralChroma uses gas chromatography technology, causes of halitosis can be precisely analyzed to confirm breath odor diagnostics treatment.

Sophisticated data management software attached(DataManager)

DataManager is a graphical software providing halitosis strength level, patient's data history, etc.

Real time halitosis measurement
Real time halitosis measurement Halitosis level judgementHalitosis level judgement Patient's data historyPatient's data history

Simple breath sampling with a supplied syringe

You can freely select where to place the OralChroma without being worried about permanent installation.

  1. Step01 Insert the supplied syringe upto the stopper into the oral cavity and hold the syringe between the front teeth.
  2. Step02 Close mouth tightly.
  3. Step03 Wait 30 seconds to one minute to have enough oral gas.
  4. Step04 Slowly pull the plunger, push it in and pull it out again before removing the syringe from the mouth.
  5. Step05 Wipe the top of the syringe with a tissue. Eject the remaining gas until it reaches 1.0ml (cc) by pushing the plunge.
  6. Step06 Inject the remaining oral gas into the inlet of the OralChroma. The measurement will start automatically.


Item Contents
Product OralChroma
Model CHM-2 (Blue: CHM-2-BL, Pink: CHM-2-PK)
Instruction manual
Detection method Simple gas chromatography using semiconductor gas sensor
Sample amount 1.0cc
Detection gas Following components included in volatile sulfur compounds:
1.Hydrogen sulfide  2.Methyl mercaptan  3.Dimethyl sulfide
Measuring time 4 minutes
Measuring unit ng/10ml and ppb
Sampling method Manual sampling with a syringe
Operating humidity 80% RH or less (no condensation)
Operating temperature 10 to 30℃
Storage humidity 20 to 90% RH (no condensation)
Storage temperature -20 to 60℃
Power supply 100 to 240V AC、50/60Hz
Power consumption 60VA
Size 280(W)×170(H)×385(D) (mm)
Weight 4kg
External connection子 USB
Attached software OralChromaDataManager
  • * OralChroma is a measuring device.

Setup guide/Operation guide

Setup guide

Operation guide