Nexisense ZH07 Laser Dust Sensor | High Consistency, Miniaturized Module, Empowering B-end Equipment for Precise Environmental Perception

ZH07 Laser Dust Sensor | High Consistency, Miniaturized Module, Empowering B-end Equipment for Precise Environmental Perception

In today's rapidly iterating market environment of smart home and environmental control equipment, air quality monitoring has become an important dimension in user decision-making. For B-end manufacturers of air purifiers, fresh air systems, smart air conditioners, etc., choosing a dust sensor with stable performance, high consistency, and easy integration directly affects product reliability and market competitiveness. The Nexisense ZH07 laser dust sensor is a solution developed precisely for these core needs. It is based on mature Mie scattering technology and combined with strict production processes to provide reliable particulate matter perception capabilities for large-scale production.

Precise Detection Technology Based on Mie Scattering Principle

ZH07 adopts the classic Mie Scattering optical principle: the laser light source irradiates suspended particulate matter in the air, the forward scattered light generated by the particles is captured by the photodetector, and after signal amplification and algorithm processing, it is converted into PM2.5 and PM10 mass concentration values. This method has high sensitivity to particles above 0.3μm and can effectively cope with different types of aerosol pollution sources.

Compared with traditional infrared obscuration or electrostatic induction methods, Mie scattering shows obvious advantages in detection accuracy, response speed, and anti-interference capability. The effective detection range of ZH07 covers 0–1000μg/m³, with PM2.5 accuracy of ±15μg/m³ in the 0–100μg/m³ range, and ±15% of reading in higher concentration ranges (tested under standard smoke source, 25℃, 50%RH conditions). T90 response time is less than 30 seconds, ensuring the device can quickly respond to changes in air quality.

High Consistency Design to Reduce Large-Scale Production Risks

In mass production, performance deviation between sensors is one of the most troublesome issues for manufacturers. ZH07 controls cross-batch consistency at a high level through standard smoke source calibration and individualized algorithm compensation for each module before leaving the factory. This means that sensors from the same batch or different batches have minimal reading deviation under the same environment, significantly reducing on-site calibration workload and quality fluctuation risks for end products.

Long-term stability is equally trustworthy. The optical cavity adopts a dust-proof structural design, combined with optimized control of laser drive, to maintain reliable operation in the temperature range of 0–50℃ and humidity of 0–95%RH (non-condensing). In typical continuous operation scenarios, performance degrades slowly, helping to reduce after-sales maintenance costs.

Dual Output Interface and Miniaturization, Simplifying System Integration

ZH07 supports two output modes: UART (TTL 3.3V level, 9600bps baud rate) and PWM:

• UART mode outputs concentration value, status code, and checksum, with clear protocol format, convenient for embedded MCU (such as STM32, ESP32) to quickly parse through serial interrupt.

• PWM mode linearly corresponds to 0–1000μg/m³ concentration with duty cycle, suitable for simple timer capture occasions.

The module size is approximately 48×40×12.5mm, weight less than 30g, operating voltage DC 4.8–5.5V, average current below 120mA, and even lower in sleep mode. These parameters allow ZH07 to be easily embedded in space-constrained devices while supporting long-term continuous operation without significantly increasing overall power consumption.

Typical Application Scenarios and Integration Value

The versatility of ZH07 makes it suitable for various B-end products:

• Air purifiers and fresh air systems: real-time monitoring of PM2.5, supporting automatic air volume adjustment, filter life reminder, and linkage control to improve user experience.

• Central air conditioning and HVAC systems: installed at return air vents or ducts to achieve Demand Control Ventilation (DCV), helping optimize energy efficiency and indoor air quality management.

• Smart environmental home appliances: integrated into dehumidifiers, humidifiers, or smart central control panels to expand air quality perception functions.

• Portable air quality detectors: providing core detection modules for professional or consumer-grade monitoring equipment.

In actual integration, it is recommended to face the air inlet toward the main airflow, avoid large particles directly impacting the optical window, and add a simple pre-filter to extend service life. In power supply design, it is recommended to use stable 5V power and add decoupling capacitors to reduce noise interference.

System Integration Notes and Best Practices

To ensure ZH07 performs at its best in end products, the following points are worth attention:

• Installation position should avoid strong light directly shining on the optical window and keep airflow unobstructed.

• UART communication recommends using interrupt reception, PWM calculates concentration through timer capture of duty cycle.

• Perform zero-point calibration regularly in clean air environment, and use RESET command to restart laser and algorithm when necessary.

• For high-reliability applications, consider paralleling multiple sensors or complementing with other types of sensors for verification.

These practices can further improve system stability and data credibility.

OEM Customization and Supply Chain Support

Nexisense provides flexible customization services for B-end partners, including protocol adjustment, range calibration, pin definition modification, brand labeling, and batch traceability management. Long-term cooperation can enjoy inventory buffering and priority supply guarantee to help customers better cope with market delivery rhythm.

Frequently Asked Questions

1. What are the obvious advantages of ZH07 compared to ordinary infrared dust sensors? Infrared sensors are easily affected by ambient light and humidity, with higher detection limits and poorer consistency; ZH07 is based on Mie scattering, can stably detect 0.3μm particles, with higher accuracy, suitable for scenarios with strict air quality requirements.

2. How to ensure consistent performance of each sensor in bulk procurement? Each module is calibrated with standard smoke source and algorithm compensation before leaving the factory, with batch deviation controlled within a small range, usually no need for one-by-one calibration of end products.

3. What is the specific format of the UART protocol? Baud rate 9600bps (8N1), data frame includes start bit, concentration value (μg/m³), status code, checksum; official documentation provides complete parsing examples and code references.

4. How to convert PWM output to actual concentration value? PWM duty cycle 0–100% linearly corresponds to 0–1000μg/m³ range, concentration can be directly converted by measuring high-level time to period ratio.

5. Is the sensor suitable for long-term continuous operation? Yes, typical operating current<120mA, design life supports continuous operation for many years, regular cleaning of optical window and using RESET function can further extend stability.

6. How to maintain after optical window contamination? The cavity has certain dust-proof capability, installation position should avoid direct blowing dust; for slight contamination, gently wipe with lint-free cloth, avoid using chemical solvents.

7. What customization options are supported? Communication protocol, output range, accuracy grading, pin arrangement, brand logo, special packaging, etc., can be customized to meet different project needs.

8. How does it perform in high humidity or extreme temperature environments? Operating range 0–50℃, 0–95%RH (non-condensing), exceeding the range may affect accuracy, but stable performance in normal indoor and outdoor application scenarios.

Conclusion: Choose ZH07 to Build a Reliable Environmental Perception Foundation

Nexisense ZH07 laser dust sensor, with high consistency, reliable detection, miniaturized design, and dual-output compatibility, provides solid perception support for air purification, fresh air, HVAC, and other B-end equipment. It helps manufacturers lower development barriers, optimize production efficiency, and bring more precise air quality management experience to end users.

If you are looking for a stable and trustworthy particulate matter sensor, welcome to contact the Nexisense team for detailed technical information, sample testing, or customization solutions. We look forward to working with more partners to jointly promote the upgrade and innovation of smart environmental products.