
Hakuto Co., Ltd.
1.What is HYDéAir ?
HYDéAir is a monitor equipment that can visualize indoor air quality (IAQ) in real-time. It comes equipped with standard sensors for CO2, PM2.5, temperature, and humidity. Additionally, optional sensors for TVOC, CO, and CH2O can be added.
The device is Bluetooth-compatible and connects with a original smartphone app, allowing users to easily check and record air environment data. The device can be adapted to various air quality management needs, depending on the installation scenario and purpose.
*The Bluetooth® word mark and logos are trademarks owned by Bluetooth SIG, Inc., and Hakuto Co., Ltd. uses these marks under license.
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2.The Importance of Air Quality
We intake food, water, and air daily, but the amount of air we consume is approximately 15kg per day—significantly larger compared to 1kg of food or 2kg of water. Moreover, we spend most of our time indoors.
Airborne pollutants (e.g., PM2.5, CO2, TVOC) are known to have significant effects on health and concentration. Therefore, managing indoor air quality is critically important for maintaining a healthy and comfortable environment. To this end, utilize the measurement data and the “Guidebook on Measures to Improve Air Quality” to improve your indoor air environment effectively.
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Advantages of Maintaining a Comfortable Indoor Environment
- Real-time visualization of harmful substances like PM2.5, CO2, TVOC, and formaldehyde in the air, enabling swift risk assessment.
- Understanding the proper timing for ventilation and adjustments to temperature and humidity helps reduce health risks (e.g., physical discomfort or sick building syndrome).
- Monitoring CO2 concentration can prevent decreases in concentration and decision-making ability, thereby enhancing learning and working environments.
- Maintaining optimal temperature and humidity prevents unnecessary operation of air conditioners and humidifiers, contributing to “energy savings and cost reduction.”

3.Product Specifications
■Sensors and Measurement Items
Sensor Type |
Mesurement |
Description |
Standard/Option |
Temperature &Humidity Sensor |
Temperature |
Measures indoor temperature. Serves as a reference for creating a comfortable living environment and managing health. |
Standard |
Humidity |
Measures indoor Humidity. Serves as an indicator for health, mold prevention, and air quality improvement. |
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CO2 Sensor |
CO2 |
Measures carbon dioxide concentration to understand ventilation levels and environmental conditions. |
Standard |
PM Sensor |
PM1.0 |
The concentration of very small particles with a diameter of 1.0 μm or less is measured. These fine particles are a concern for respiratory health. |
Standard |
PM2.5 |
The concentration of particulate matter with a diameter of 2.5 μm or less is measured. It is commonly used as an indicator for air pollution and health impacts. |
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PM10 |
The concentration of particulate matter with a diameter of 10 μm or less is measured. This includes relatively large particles such as pollen and dust. |
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CH2O Sensor |
CH2O |
Detects formaldehyde levels, aiding management of harmful substances and mitigating "sick building" risks. |
Option |
CO |
CO |
Measures carbon monoxide levels for safety during gas leaks or fire hazards. |
Option |
TVOC Sensor |
TVOC |
Tracks harmful chemicals emitted from paint or adhesives. |
Option |
*Standard Options: Built-in within the device. Optional: Additional choices available during order placement.
■Measurement item range and accuracy
Measurement Item |
Range |
Accuracy |
Temperature |
-20.0~50.0℃ |
≦±1℃ |
Humidity |
0.0~100.0%RH |
≦±10%@30%RH、≦±5%@50%RH、≦±10%@80%RH |
CO2 |
400~5,000ppm |
≦±20% |
PM1.0 |
0~1,000ug/m3 |
≦±30% (≻100ug/m3)、≦±30ug/m3 (≦100ug/m3) |
PM2.5 |
0~1,000ug/m3 |
≦±25% (≻100ug/m3)、≦±25ug/m3 (≦100ug/m3) |
PM10 |
0~1,000ug/m3 |
≦±30% (≻100ug/m3)、≦±30ug/m3 (≦100ug/m3) |
CH2O |
0~5,000ppb |
≦±25% (≻162ppb)、≦±25ppb (≦162ppb) |
CO |
0.0~20.0ppm |
≦±20% |
TVOC |
0~2,000ppb |
≦±20% |
*Figures listed are representative and reference values (design guaranteed values).
*1ppm=1,000ppb
■Communication
This product is compatible with Bluetooth® 5.2 and has obtained technical compliance certification (R210-196820) within Japan.

■Power Supply
- USB Type-C(5V/1A)
■Dimensions & Weight
- Dimensions:80×80×125mm
- Weight:280g
4.Accessories
- IAQ Monitor device x1
- USB Type-C cable x1
- Quick Start guide x1
5.Usage Scenarios
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6.Maintenance
■Regarding Optional Sensor Replacement(CO/TVOC・CH2O)/h4>
- Optional sensors are order-dependent; verify specifications before purchase.
- Replace these sensors approximately every two years after first use.
- Sensor replacement cannot be performed by the user. Contact Hakuto Co., Ltd.’s support center for paid replacements.
- Inaccurate measurements might result if sensors are not replaced promptly.
7.User Manual
Download the detailed HYDéAir user manual (PDF) here.
User Manual Download(PDF)Note : Only Japanese version
8.Air Quality Improvement Guide
We offer a free "Guidebook on Measures to Improve Air Quality (PDF)," summarizing everyday measures for better air quality.
Air Quality Improvement Guide.pdf
Note : Only Japanese version
For further inquiries about HYDéAir
Reception hours: Weekdays 9:00-17:30
(excluding Saturdays, Sundays, holidays, and company-designated holidays)