Overview
Passive sampling is a foundational technique in environmental science for measuring pollutant concentrations over extended periods. Unlike active methods requiring pumps, it utilizes natural molecular movement—diffusion for gases or permeation for liquids—to accumulate contaminants on a collecting medium. Developed in the 1970s for workplace air monitoring, modern variants like diffusive gradients in thin films (DGT) and polyurethane foam (PUF) samplers now address diverse matrices. The method's passive nature eliminates power needs, making it ideal for unattended field deployments. Regulatory agencies such as the EPA and ISO endorse specific passive samplers for compliance monitoring. Its growing adoption in B2B sectors stems from the ability to provide spatially resolved, time-weighted average data critical for industrial emission assessments and remediation planning.
Key Features
Time-integrated measurement is the hallmark of passive sampling, capturing fluctuating pollutant levels more representatively than grab sampling. Devices like radial diffusive samplers for air or Chemcatcher® for water achieve part-per-trillion detection limits through analyte preconcentration over days to weeks. Their compact size enables covert deployment in sensitive industrial settings. Modern passive samplers incorporate engineered materials to target specific compounds—activated carbon for non-polar organics, chelex resins for metals. Membrane-based designs (e.g., semipermeable membrane devices) mimic biological uptake, yielding data relevant to bioavailability. Recent advances include temperature-compensated designs and smartphone-readable colorimetric variants for real-time field analysis.
Application Areas
In industrial hygiene, passive samplers monitor worker exposure to vapors like benzene or formaldehyde, with OSHA-compliant options available. Environmental consultants use them for landfill gas surveys, where continuous methane monitoring informs mitigation strategies. The oil/gas sector deploys hydrocarbon vapor samplers along pipeline corridors for leak detection. Water quality applications include tracking pesticide runoff from agricultural fields using polar organic chemical integrative samplers (POCIS). DGT devices measure bioavailable metal fractions in mining-impacted waters, supporting regulatory compliance. Emerging uses encompass microplastic monitoring and indoor air quality assessments in green buildings.
Precautions
Wind speed significantly affects air sampling rates—sheltering devices with wind shields improves accuracy. For water samplers, biofouling can alter uptake rates; copper mesh or biocidal coatings may be necessary in eutrophic waters. Field blanks must accompany each batch to account for handling contamination. Laboratory analysis requires method-specific extraction protocols. Thermal desorption works for volatile organics on sorbent tubes, while acid digestion is needed for metal-loaded DGT gels. Quality control includes regular calibration against active sampling under representative field conditions to determine sampler-specific uptake rates.
B2B Procurement Guide
Industrial buyers should prioritize samplers with ISO 16017-2 or equivalent certifications for regulatory acceptance. Bulk purchases of disposable badges (e.g., 3M™ Organic Vapor Monitor) offer economies for large-scale workplace monitoring programs. For custom applications, manufacturers like Gradko International provide samplers tailored to novel analytes. Consider total cost of ownership—some samplers require expensive laboratory analysis, while colorimetric variants allow on-site reading. Cloud-connected passive sensors (e.g., Aeroqual’s diffusion tubes with NFC data logging) streamline data integration for environmental management systems. Request performance data for your specific target compounds, as uptake rates vary by chemical properties.
Related Manufacturers
- 主营：[]
- 主营：[]
- 主营：光谱仪、分析仪、监测仪、采样器、望远镜、蒸干仪、测定仪、铁谱仪、流量计、研磨机、消解器、铬酸盐、混匀仪、测试仪、露点仪、反应罐、锰酸盐、浊度仪、均质器、检测仪、蒸馏仪、浓缩仪、清洗机、残氧仪、测油仪
- 主营：[]
- 主营：[]
- 主营：[]
- 主营：[]
- 主营：[]
- 主营：[]
- 主营：气体检测仪、水质检测仪、测距仪、自动水质采样器、大气采样器、空气微生物采样器、恒温恒湿称重系统、油气回收检测仪、风速仪、声级计、尘埃粒子计数器、湿球黑球温度指数仪、温湿度测试仪、烟尘烟气测试仪、红外测温仪、VOC气体检测仪、可燃气体浓度检测仪、全自动菌落计数器
- 主营：检测仪、voc测试仪、油烟测试仪、大气采样器、水质采样器、自动监测仪、油烟分析仪、油烟监测仪、气体检测仪、水质分析仪、烟气分析仪、明渠流量计、环境检测仪
- 主营：voc检测仪、恒湿称重系统、油烟监测仪、自动采样器、大气采样器、采样测试仪、水质采样器、氟化物采样器、油烟检测仪、光散射、测定仪、cod消解、粉尘连续、水质检测仪、烟气检测仪、在线分析仪、烟气含湿量、气体检测仪、烟气分析仪、回收检测仪、内置锂电池、自动分析仪、粉尘检测仪、激光粉尘仪、氧化碳分析仪
- 主营：分析仪、监测仪、报警仪、执法包、采样器、采样头、吸气臂、测量仪、锂电池、臭氧计、加热器、黑度仪、测定仪、传感器、物安全、计数器、流量计、传声器、消解器、烟度计、机器人、控制器、防护包、浊度仪、检测器
- 主营：测试仪、分析仪、流速仪、采样器、烟尘采样仪、湿度采样仪、烟尘采样枪、废气采样仪、采样采样仪、大气采样仪、氟化物采样仪、土壤气、烟气黑度、烟尘取样管、智能中流量、烟尘多功能、烟尘在线设备、空气微生物质、智能恒流大气、烟气监测系统、高负压氟化物、真空箱负压气、智能烟尘烟气、紫外差分烟气、自动烟尘烟气
- 主营：气体检测仪、水质分析仪、烟尘烟气测试仪、水质采样器、大气采样器、超声波明渠流量计、恒温恒湿称重系统、个人防护包、油气回收检测仪
- 主营：气体检测仪、水质分析仪、烟尘烟气分析仪、水质采样器、大气采样器、粉尘颗粒物检测仪、油气回收检测仪、流量校准仪、林格曼黑度仪、VOC检测仪、FID、红外CO/CO2分析、甲醛检测仪、激光甲烷遥距仪、明渠流量计、风速仪、ATP荧光检测仪、TOC总有机碳分析仪、汽车尾气分析仪、红外测油仪、恒温恒湿称重系统
- 主营：检测仪、声级计、智能红外、水质采样器、烟尘采样器、微生物采样器、气溶胶采样器、静电能谱、职业卫生、水质自动、生物安全柜、电子流量计、红外测温仪、烟气测试仪、气体分析仪、明渠流量计、厨房油烟检测
- 主营：水浴箱、分析仪、监测仪、采样器、报警仪、臭氧计、触摸屏、控制器、黑度仪、电子秤、测温仪、测定仪、传感器、物安全、计数器、流量计、消解器、照度仪、干燥筒、机器人、测试仪、离心机、光离子、防护包、浊度仪
- 主营：分析仪、监测仪、消解器、采样器、粉尘仪、回流管、防护箱、测量仪、检测仪、培养箱、风速仪、黑度仪、微波炉、测定仪、遥测仪、萃取仪、指数仪、流量计、防护包、测油仪、真空泵、无氧培养、加热装置、水质监测、光电光度
- 主营：分析仪、监测仪、报警仪、采样器、测量仪、臭氧计、加热器、均浆机、黑度仪、测定仪、传感器、流量计、传声器、频率计、烟度计、机器人、控制器、测试仪、无人机、防护包、探测器、浊度仪、防护箱、抽滤仪、检测仪
- 主营：分析仪、监测仪、报警仪、采样器、吸气臂、回流管、无人船、测量仪、臭氧计、均质器、风速仪、均浆机、黑度仪、电子秤、测定仪、传感器、计数器、传声器、混匀仪、流量计、机器人、控制器、量率仪、测试仪、试验箱
- 主营：在线水质采样器、明渠流量计
- 主营：测油仪、水质测定仪、BOD测定仪、大气采样器、COD消解器、氮吹仪、硫化物酸化吹气仪、索氏提取器、蒸馏仪、振荡器、恒温恒湿称重系统、明渠流量比对装置、土壤研磨机、土壤团聚体分析仪、烟尘烟气分析仪、林格曼黑度计、综合压力流量校准仪、北京踏实、洗瓶机、固相萃取仪
- 主营：便携式五参数水质检测、个人防护包、快检试剂、便携式水质采样器、便携式多参数水质检测、便携式明渠流量计、激光测距仪、恒温恒湿称重系统、氨氮六价铬水质检测仪、油烟检测仪、烟尘烟气检测仪、便携式多气体检测仪、紫外辐射照度计、激光粉尘检测仪、风速仪