Chai khí chuẩn 4 thành phần / 4 mixed gas: 10 ppm H2S / 50 ppm CO / 2.5 % CH4 (50% LEL) / 18 % O2
Chai khí chuẩn 4 thành phần / 4 mixed gas: 10 ppm H2S / 50 ppm CO / 2.5 % CH4 (50% LEL) / 18 % O2
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Chai khí chuẩn 50ppm H₂S/ 500ppm CO/ 2.5% CH₄/ 20.9% 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 15ppm H₂S/ 50ppm CO/ 2.5% CH₄/ 18% O₂/ N₂ Balance – Model 8AL
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Chai khí chuẩn 18% O₂/ N₂ Balance – Model 8AL