Unverified90% confidenceDecision RuleTime unknown
只有采用电化学传感器的检测仪才具备甲醛特异性识别能力，量程需覆盖0-2mg/m³且分辨率达0.01mg/m³才能准确判断是否超过国标0.08mg/m³（GB/T 18883）限值
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Unverified只有采用电化学传感器的检测仪才具备甲醛特异性识别能力，量程需覆盖0.01-2.00mg/m³且分辨率达0.01mg/m³才能判断是否超过国标0.08mg/m³限值99% similarUnverified百元级半导体传感器检测仪的分辨率虽标注0.01mg/m³，但实际误差常达±30%以上，只能判断浓度大致趋势，不能作为是否达标（0.08mg/m³）的绝对依据83% similarUnverified追求接近CMA实验室的准确度时，应选择进口电化学传感器（如英国Dart、日本Figaro）机型，分辨率≤0.01mg/m³，示值误差≤±0.02mg/m³或±15%，否则0.08与0.12这种关键临界读数不可信76% similarUnverified电化学CO传感器精度和寿命优于半导体式，选购时确认标注电化学（Electrochemical）传感器，报警阈值应符合50ppm/60min、100ppm/10-40min的分级响应71% similarUnverified检测指标堆得越多，单项精度往往越低——低价六合一/九合一机器多用半导体传感器凑数，宁可选甲醛+PM2.5+CO2三项都用专业传感器的机型69% similar
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