Chai khí chuẩn 4 thành phần – 4 mixed gas: 25ppm H2S / 100ppm CO / 2.5% CH4 (50% LEL) / 18% O2
Chai khí chuẩn 4 thành phần – 4 mixed gas: 25ppm H2S / 100ppm CO / 2.5% CH4 (50% LEL) / 18% O2
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Chai khí chuẩn 4 thành phần – 4 mixed gas: 25ppm H2S / 50ppm CO / 0.9% i-C4H10 (50% LEL) / 12% O2
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Chai khí chuẩn 50ppm H₂S/ 500ppm CO/ 2.5% CH₄/ 20.9% O₂/ N₂ Balance – Model 8AL
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Chai khí chuẩn 25ppm H₂S/ 100ppm CO/ 2.5% CH₄/ 17% O₂/ N₂ Balance – Model 2AL
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Chai khí chuẩn 25ppm H₂S/ 100ppm CO/ 2.5% CH₄/ 17% O₂/ N₂ Balance – Model 8AL
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Chai khí chuẩn 20.9% O₂/ N₂ Balance – Model 8AL