Why measure odors?

Odor measurement is not only aimed at controlling discomfort but also serves many important goals in industry and daily life. Odor measurement in the workplace plays a crucial role in protecting health, optimizing productivity, and ensuring legal compliance for businesses.

• Protect your health: The foul odor is often accompanied by toxic compounds (such as TVOCs, ammonia, and H₂S) that can directly affect the health of employees and surrounding residents.
• Find the source of the spread: The device helps pinpoint the exact location of gas leaks or odor sources in factories, landfills, or wastewater treatment systems for timely intervention.
• Evaluating odor removal effectiveness: Measure odor levels before and after using air filtration systems or cleaning services to demonstrate cleaning effectiveness.
• Quality Control (QC): In the food, cosmetics, or chemical manufacturing industries, odor measurement helps ensure product consistency and improve the workplace environment.
• Comply with environmental regulations: Supporting businesses in monitoring and reporting pollution trends, thereby avoiding fines related to emissions monitoring.

Protecting health and safety at work. 

• Toxic gas warning: Many gases are colorless but have a distinctive odor (such as H₂S, H sub 2 cap, SH₂S, which smells like rotten eggs) that indicates a deadly hazard. However, at high concentrations, some gases can numb the sense of smell, leading personnel to mistakenly believe the danger has passed; in such cases, measuring equipment such as Shinyei OMX It is the only objective warning tool.
• Preventing occupational diseases: Prolonged exposure to chemical fumes, printing inks, or volatile organic compounds (TVOCs) can cause headaches, nausea, and damage to the nervous system, liver, and kidneys. 

Handheld odor detector Shinyei OMX series (like OMX-SRM, OMX-ADM, OMX-TDMIt operates on the principle of using a pair of semiconductor gas sensors to measure the relative concentration of odors.

"OMX-SRM" Suitable for detecting odors in restrooms, measuring the smell of tobacco, medicine, food, and odors from manufacturing processes.
"OMX-ADM" Suitable for measuring pet odor and ammonia odor, detecting odors in hospitals and nursing homes, measuring odor levels in waste treatment plants, restaurants, and fish markets.
"OMX-TDM" Suitable for detecting TVOCs in living environments, petrochemical plants, and factories producing organic solvent products.

Sampling Method

• The device integrates one Built-in air pump to perform continuous sampling.
• Air from the environment is drawn in through the suction nozzle, directly contacting the semiconductor sensor surface. 

Measurement and Display Methods

• Relative comparison: The device measures the change in resistance of the sensor when in contact with the target gas compared to clean air (after passing through a carbon filter).
• Display index:
  • Odor Strength: Displayed as numbers (e.g., 0-999) to indicate the intensity of the odor.
  • Odor Classification: Displays scent tendency through the difference in response between the two sensors. 

Important features to note

• Reference value: The measurement results for the OMX current are: relative value, which is not an absolute concentration value (like ppm or mg/m³) and does not perfectly correspond to the human sense of smell.

The Shinyei OMX series odor meter includes three main models: OMX-SRM, OMX-ADM, and OMX-TDMEach model is designed for specific gases and applications. Their common feature is the use of dual semiconductor gas sensor (except for OMX-TDM which uses a single sensor) and continuous sampling methods using an integrated pump. 

SHINYEI OMX-SRM (0.0 to 999 / Intensity value) 

Below is a table of detailed technical specifications for the models:

Important noteThe Shinyei OMX device displays the odor intensity value. relative Based on the manufacturer's proprietary algorithm, these are not absolute concentrations (ppm) according to international standards (except for the TDM model which displays µg/m³ Toluene equivalent). These values are used for "before and after" comparisons when deodorizing or locating the source of odor emission.

Shinyei OMX's odor measurement standard

OMX series devices (such as OMX-ADM) use a method of displaying odor intensity based on Japanese Regulation.

• 6-level scale: The odor intensity is converted to a scale from 2.5 to 5.0 based on the equivalent ammonia concentration, in accordance with the sensory evaluation standards in Japan.
• Note regarding absolutes: This device is considered a tool. relative measurementThe value displayed on the device is a reference value for comparing changes in odor. Not for replacement Official methods for measuring absolute concentration according to international standards include: ASTM (USA) or Olfactometer (Europe) in strict legal reports.
• Software required: The results can be analyzed through DPS data processing software to generate a trend report.

You can confidently contact Semiki Company to purchase Shinyei OMX odor detectors.

Contact Semiki:

Website: You can find out more details and send a consultation request via Semiki.com.

Business email: [email protected]

Phone number (Hotline): +84 979 761 016.