High concentration atmospheric particulate matter sensor

High concentration atmospheric particulate matter sensorOverview

PMS 16000High concentration particulate matter sensors provide a solution for the online industry of atmospheric environment and can be widely applied to micro airStation, dust monitoring, oil fume monitoring and other monitoring systems.

High concentration atmospheric particulate matter sensorcharacteristic

Compared to the beta ray method, it has higher accuracy and correlation;

Users can install an external 1.1L/min air pump or customize the flow rate;

All metal precision machine structure, stable operation in multiple scenarios;

Miniaturization facilitates the integration and use of multiple devices;

The lifespan of the laser can reach 20000 hours;

Dustproof structure, strong anti pollution ability, improves the service life of products, and has low maintenance costs;

The effective range can reach 0-100mg/m ³;

working principle

This sensor is based onMIEScattering principle is used for particle concentration detection. When the external air passes uniformly through the light collection chamber, the sampled gasThe particles scatter through the beam of light, and the photoelectric acquisition unit converts the scattered light signal into a voltage pulse signal, which is amplified before amplification,ADAfter conversion, it becomes a digital signal. The number of measured voltage pulses is equal to the number of particles,The amplitude of voltage pulses reflects the large optical equivalent particle size of particlesSmall. After calibrating the threshold of particle scattering intensity with a calibration substance, the optical equivalent particle size distribution is determined by inverting the mass concentration, thereby determining the test loopThe mass concentration of particulate matter in the environment.

1. MIEScattering principleMieScattering theory is the Maxwell's equation for a single homogeneous medium sphere in a homogeneous medium under monochromatic parallel light irradiationThe exact solution of Cheng. The scattering that occurs when the diameter of particles in the atmosphere is equal to the wavelength of radiation is called Mie scattering. Mie's is different from Rayleigh'sDistributed symmetrically, its scattering is stronger in the forward direction than in the backward direction,The directionality is relatively obvious; When the particle diameter is large, Mie'sScattering can be approximated as Fraunhofer diffraction.

2. Optical structure and principle

Product Specifications

Overall dimensions

Precautions

When installing sensors, ensure that the ground wire in the power cord is well grounded;

When installing sensors, it is recommended to install them with grounding or insulation, and it is forbidden to have the casing live;

Do not knock, vibrate, or drop this product to avoid damaging the circuit board and optical components;

When the sensor is applied to outdoor fixed equipment, the outdoor equipment shall provide protection against sandstorm, rain and snow and willow catkinsBusiness completion;

Without permission, please do not disassemble the sensor and do not repair it privately to avoid accidents or aggravating the damage to the sensorSensors should be repaired by specialized personnel from the manufacturer;

Sensors generate heat during operation, so it is important to maintain good ventilation in the working environment to prevent damage to the machine due to excessive temperature;

When installing and using this product in the system, it should be ensured that the air inlet and outlet are unobstructed, and there should be no large airflow directly facing the air inlet and outlet;

The size of the ventilation hole opened on the inner wall of the user's machine for the air inlet should not be smaller than the size of the sensor air inlet;

Sensors are not directly in contact with the monitoring environment (such as those installed in equipment chassis). In order to obtain accurate sampling and measurement results, please ensure that the sensors are properly connectedThe air inlet of the sensor should be connected to the external probe of the chassis, and the length of the connecting hose between the sensor and the external probe should be controlled within30cmWithin;

The external probe of the chassis needs to have windproof, coarse filtering, and waterproof capabilities;

When the humidity increases, the sensorBetaThe data of the attenuation quality monitoring instrument may have positive deviation, so users need to add dynamic additionThermal system to ensure consistencyBetaData correlation of attenuation quality monitoring instrument;

maintenance

This product is a particle sensor based on the principle of laser scattering, belonging to precision optoelectronic instruments. A good operating environment is conducive to the instrument's performanceMaintain and extend the service life. Keep it dry and clean. Excessive humidity and dust can corrode circuit boards and optical components, shortening the sensing processThe lifespan of the device;

If the product cannot work properly, please send it back to the original factory for repair, and professional personnel will provide assistance services for you. Unauthorized disassembly is prohibited;

To ensure the safety and reliability of product use, it is recommended that users return the product to the production unit for calibration once a year. We only charge a small amountMaintenance costs.