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We've made it easy for you to find your equivalent calibration gas. Just enter your part number in the search box (top right of every page). Or use the filters in the left column to narrow in on your calibration gas. Save up to 50% of the cost of brand name gases. We supply identical mixtures with ISO and NIST certification.
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RKI Instruments 81-0090RK-03 Replacement - 50 PPM Carbon Monoxide, 50% LEL Methane, 12% Oxygen, Balance Nitrogen (103L)
$145.0050 PPM Carbon Monoxide, 50% LEL Methane, 12% Oxygen, Balance Nitrogen, 103 Liter Steel Cylinder (RKI Instruments 81-0090RK-03 Equivalent). -
RKI Instruments 81-0093RK Replacement - 50 PPM Carbon Monoxide, 25% LEL Pentane, 12% Oxygen, Balance Nitrogen (17L)
$50.0050 PPM Carbon Monoxide, 25% LEL Pentane, 12% Oxygen, Balance Nitrogen, 17 Liter Steel Cylinder (RKI Instruments 81-0093RK Equivalent). -
RKI Instruments 81-0155RK-04 Replacement - 25 PPM Hydrogen Sulfide, 50 PPM Carbon Monoxide, 15% LEL Hexane, 12% Oxygen, Balance Nitrogen (29L)
$165.0025 PPM Hydrogen Sulfide, 50 PPM Carbon Monoxide, 15% LEL Hexane, 12% Oxygen, Balance Nitrogen, 29 Liter Aluminum Cylinder (RKI Instruments 81-0155RK-04 Equivalent). -
RKI Instruments 81-0159RK-02 Replacement - 5 PPM Sulfur Dioxide, 50 PPM Carbon Monoxide, 50% LEL Methane, 12% Oxygen, Balance Nitrogen (58L)
$248.005 PPM Sulfur Dioxide, 50 PPM Carbon Monoxide, 50% LEL Methane, 12% Oxygen, Balance Nitrogen, 58 Liter Aluminum Cylinder (RKI Instruments 81-0159RK-02 Equivalent). -
RKI Instruments 81-0090RK Replacement - 50 PPM Carbon Monoxide, 50% LEL Methane, 12% Oxygen, Balance Nitrogen (17L)
$50.0050 PPM Carbon Monoxide, 50% LEL Methane, 12% Oxygen, Balance Nitrogen, 17 Liter Steel Cylinder (RKI Instruments 81-0090RK Equivalent). -
RKI Instruments 81-0154RK-04 Replacement - 25 PPM Hydrogen Sulfide, 50 PPM Carbon Monoxide, 50% LEL Methane, 12% Oxygen, Balance Nitrogen (29L)
$165.0025 PPM Hydrogen Sulfide, 50 PPM Carbon Monoxide, 50% LEL Methane, 12% Oxygen, Balance Nitrogen, 29 Liter Aluminum Cylinder (RKI Instruments 81-0154RK-04 Equivalent). -
RKI Instruments 81-0089RK-03 Replacement - 50 PPM Carbon Monoxide, 15% LEL Hexane, 12% Oxygen, Balance Nitrogen (103L)
$145.0050 PPM Carbon Monoxide, 15% LEL Hexane, 12% Oxygen, Balance Nitrogen, 103 Liter Steel Cylinder (RKI Instruments 81-0089RK-03 Equivalent). -
RKI Instruments 81-0090RK-01 Replacement - 50 PPM Carbon Monoxide, 50% LEL Methane, 12% Oxygen, Balance Nitrogen (34L)
$62.0050 PPM Carbon Monoxide, 50% LEL Methane, 12% Oxygen, Balance Nitrogen, 34 Liter Steel Cylinder (RKI Instruments 81-0090RK-01 Equivalent). -
RKI Instruments 81-0158RK-04 Replacement - 25 PPM Hydrogen Sulfide, 50 PPM Carbon Monoxide, 50% LEL Isobutane, 12% Oxygen, Balance Nitrogen (29L)
$165.0025 PPM Hydrogen Sulfide, 50 PPM Carbon Monoxide, 50% LEL Isobutane, 12% Oxygen, Balance Nitrogen, 29 Liter Aluminum Cylinder (RKI Instruments 81-0158RK-04 Equivalent). -
RKI Instruments 81-0091RK Replacement - 100 PPM Carbon Monoxide, 25% LEL Pentane, 19% Oxygen, Balance Nitrogen (17L)
$50.00100 PPM Carbon Monoxide, 25% LEL Pentane, 19% Oxygen, Balance Nitrogen, 17 Liter Steel Cylinder (RKI Instruments 81-0091RK Equivalent).
