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±0.20%CH4 ±0.10%CH4 ±0.01%CH4 ±0.05%CH4
≥1.0%CH4;≥1.0%CH44;<1.0%CH4 ≥1.5%CH4;≥1.5%CH44;<1.0%CH4 ≥1.0%CH4;≥1.5%CH44;<1.0%CH4 ≥1.5%CH4;≥1.0%CH44;<1.0%CH4
±0.20%CH4 ±0.10%CH4 真值的±10%CH4 真值的±20%CH4
≥1.0%CH4;≥1.0%CH4; ≥1.5%CH4;≥1.5%CH4; ≥1.0%CH4;≥1.5%CH4; ≥1.5%CH4;≥1.0%CH4;
2.00%~3.00%CH4 3.00%~5.00%CH4 1.00%~2.00%CH4 2.00%~4.00%CH4
0.2%CH4 0.4%CH4 0.3%CH4 0.01%CH4
25%CH4 30%CH4 35%CH4 40%CH4
≥0.5%CH4 ≥0.75%CH4 ≥1.5%CH4
0.04%CH4,0.4%CH4 0.1%CH4,0.4%CH4 0.02%CH4,0.4%CH4 0.1%CH4,0.5%CH4
0.1%CH4,0.1%CH4 0.1%CH4,0.4%CH4 0.01%CH4,0.1%CH4 0.01%CH4,0.01%CH4
≥1.0%CH4 ≥0.75%CH4 ≥0.5%CH4
≥0.5%CH4,≥0.5%CH4,<0.5%CH4 ≥1.5%CH4,≥1.5%CH4,<1.5%CH4 ≥1.0%CH4,≥1.0%CH4,<1.0%CH4
≥1.5%CH4 ≥1.0%CH4 ≥0.5%CH4
≥0.5%CH4 ≥1.5%CH4 ≥1.0%CH4