Environmental Air Comprehensive Sampler Portable Design for Rapid Response Scenarios

The environmental air comprehensive sampler launched by Shandong Hengmei Electronic Technology Co., Ltd. strictly follows national standards such as HJ 93-2013 and HJ 618-2011, integrates high negative pressure fans, intelligent temperature control systems, and anti-interference design, and can be widely used in grid monitoring, source apportionment research, and emergency response scenarios. We are committed to providing solid support for environmental management and scientific research through high-performance and highly reliable products.

The challenges of environmental air monitoring and the importance of samplers

The pollutants in the atmosphere are in gaseous form (such as SO ₂, NO ₓ) and particulate matter (such as TSP, PM ₁₀, PM ₂) The concentration level, spatiotemporal distribution, and chemical composition of pollutants such as ₅ exist in various forms, and are key basis for evaluating air quality, tracing pollution sources, and formulating governance strategies. The manual monitoring method remains the "gold standard" for monitoring and scientific analysis of many national control points due to its irreplaceable accuracy and authority. However, manual monitoring places extremely high demands on the stability, anti-interference ability, and ease of operation of sampling equipment.

The environmental air comprehensive sampler is a professional equipment designed to meet this demand. It integrates the functions of absorbing gaseous pollutants and capturing particulate matter, ensuring the representativeness of the collected samples through precise control of sampling flow rate, time, and environmental parameters, laying a solid foundation for subsequent laboratory analysis.

Core technical principle: Constant current sampling and multi-channel collaborative design

The modern environmental air comprehensive sampler is based on the principles of solution absorption method and membrane weighing method, and achieves standardized sampling through precise fluid control and intelligent monitoring system.

1. Principle of particulate matter sampling (filter membrane weighing method)

Sampling mechanism: Imported high negative pressure fan is used, with a load capacity of over 20 kPa at a flow rate of 100 L/min, ensuring high flow sampling stability. When the airflow passes through the aluminum anti-static sampling head, particulate matter is trapped on a specific material filter membrane (such as TSP, PM ₁₀, or PM ₂) Cutting head).

Flow control: By using a mass flow meter and PID algorithm closed-loop control, the impact of temperature and pressure changes on flow is calibrated in real time to ensure the accuracy of standard condition volume calculation (in accordance with HJ 618-2011 and other standards).

2. Sampling principle of gaseous pollutants (solution absorption method)

Multi channel independent design: supports two constant temperature and current atmospheric sampling channels, each channel can independently set flow rate (usually 0.1-1.0 L/min) and time to avoid cross contamination.

Constant temperature control: using semiconductor refrigeration or heating system to stabilize the temperature of the absorption bottle at the set value (such as 4 ℃), preventing the loss of volatile components.

3. Intelligent and Reliable Design

Dual mode operation: The 7.0-inch high brightness touch screen and physical buttons work together to meet the operational needs in harsh outdoor environments.

Data integrity assurance: Built in storage capacity>100000 sets of data, supports power outage protection and continuous acquisition functions, ensuring the continuity of long-term monitoring.

Technical advantages: high load, intelligence, and all-weather adaptability

Compared with traditional equipment, the environmental air comprehensive sampler performs outstandingly in the following aspects:

Load capacity: The imported fan provides a load of>20 kPa and supports high resistance membrane sampling (such as fluoride and heavy metal specific membranes)

Intelligent control: automatic temperature and pressure compensation, standard condition volume calculation; Bluetooth printing/USB dual output to meet data traceability requirements

Environmental adaptability: dustproof and waterproof design (IP54 or above), can work in rainy and snowy weather; Electromagnetic compatibility optimization, strong anti-interference ability

Multi scenario compatibility: One machine for multiple uses, flexible configuration of TSP and PM ₂ ₅ Sampling path for gaseous pollutants, reducing equipment investment costs

Addressing industry pain points and application cases

1. Pain point one: Insufficient sampling stability under complex meteorological conditions

Solution: High negative pressure fan and constant current algorithm ensure stable flow under pressure and temperature fluctuations, avoiding data distortion.

2. Pain point two: Weak portability and battery life of equipment in emergency monitoring

Solution: Lightweight design (whole machine<10 kg), supports DC power supply and power-off continuous mining, suitable for field mobile monitoring.

3. Application case: PM ₂ in industrial areas Source analysis research

Requirement background: A certain environmental protection bureau needs to clarify the regional PM ₂ The contribution sources of heavy metals in ₅ (industrial emissions or transportation sources).

Implementation process: Use an ambient air comprehensive sampler equipped with PM ₂ Cutting head and polypropylene filter membrane, continuous sampling for 7 days, flow rate set at 16.7 L/min, synchronous collection of gaseous SO ₂ samples.

Result: Laboratory analysis of the filter membrane showed that the peak concentrations of zinc and lead were highly correlated with the operating cycle of the upwind smelter, providing a basis for accurate traceability.