Start with your process. Find the right instrument.
Learn measurement principles, check process conditions, configure products and save technical resources.

A complete English edition of this article has not been published. The complete available Chinese version is shown below.

← Back to knowledge hub
Field troubleshooting4 min readContent language: ChineseUpdated 23 October 2026

空气质量:为什么不能按湿度一律扣减PM?

吸湿性取决于颗粒组成,固定修正系数无法覆盖所有气溶胶。

具体问题的回答

吸湿性取决于颗粒组成,固定修正系数无法覆盖所有气溶胶。

液滴也会散射光,高湿或加湿器近旁的结果可能受雾滴和吸湿增长影响。

成立条件与容易混淆的量

提供湿度和水雾风险,核对传感器采样保护及是否需要适配的条件控制。

空气质量包含颗粒物与不同气态污染物等多类信息。光散射颗粒传感器、金属氧化物VOC指数、二氧化碳光学通道等响应原理不同。一个综合指数是算法结果,并不是所有有害物的逐项化学分析;不同设备给出的同名指标也可能采用不同定义。

针对性核查与判据

把测点移离水雾直冲区并记录湿度变化,不能用擦拭外壳替代光路检查。

  • 验证目标气溶胶与湿度条件,保存对应型号、设置和原始状态,不只记录最终显示值。
  • 颗粒读数随加湿器瞬间上升,先查雾滴及气流,不立即断定所有增量都是干粉尘。
  • 交接注明高湿边界和测点布置,对异常条件的数据作相应质量标记。
  • 围绕“相同湿度下盐粒和疏水烟粒响应不同”保留前后变化;用“吸湿性取决于颗粒组成,固定修正系数无法覆盖所有气溶胶”检验原因,若独立参考不支持该关系则继续排查。

假设案例与原因区分

假设现场出现以下情形:相同湿度下盐粒和疏水烟粒响应不同。这时需要区分真实对象变化、输入条件改变与测量链失效;应让独立参考、原始信号和状态记录分别回答相应问题。

修正需要知道气溶胶的吸湿性及模型适用范围,不同来源可能有很不同的增长。纯按湿度扣固定比例,会把真实干颗粒变化也改写。模型若用于控制或报告,应保留训练条件与独立验证范围。

适用边界与技术结论

环境监测或舒适度传感器不自动具备职业安全检测能力。甲醛、CO、NO₂、臭氧等具体风险应依据目标物种和适用方法单独核对。

型号确认应同时覆盖正常工作范围、异常输入、输出有效性及允许维护条件,不能由某个静态点的表现推定全部运行状态。参考资料解释技术方法,实际范围、配置和限制以对应型号正式文件为准;不据其他制造商资料推定道威斯顿产品具有相同能力或认证。

Apply this knowledge to product selection

Customers and procurement

Check actual application and acceptance requirements against the article and product documentation. Bring open questions to DOWESTON for technical review.

Sales and technical teams

Record customer questions with application conditions. Verify range, interfaces and operating requirements against the selected model documentation.

Turn questions into application requirements

Collect application, connection, installation and acceptance requirements for the selected product, then review open points with DOWESTON.

Choose a product and prepare requirements
Not signed in to DOWESTON?
Create an account to start selecting products, check prices, and receive our newsletter on the latest products and trends.
Products & Services
Doweston offers a range of services to help you quickly build automated instrumentation systems. Contact us to learn more.
Ready to buy?
If you would like to purchase products,
simply contact our sales team — we are happy to help.
Who we are
DOWESTON delivers accurate and reliable measurement solutions
— trusted sensing and detection products for every industry!
Need service?
If you want to optimize production and reduce downtime,
we can help you choose the right spare parts and service products.
Edit Configuration

Product

Brand

Model

Confirm Changes Cancel
Your screen may be too small for the best experience.
We recommend using a computer,
or contact an engineer right away for selection support!
Need faster service? Call
400-888-4436
Continue Browsing