Calibration Gas

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250 ppm Carbon Monoxide, 50% LEL Methane, 40 ppm Hydrogen Sulfide, 21% Oxygen, Balance: Nitrogen, Calibration Gas –401

Equivalent to:  Bacharach P/N: 54-0298

250 ppm CO, 50% LEL Methane, 40 ppm H2S, 21% O2, Balance: N2

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Price: from $60.00

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