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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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  1. Industrial Scientific 1810-2312 Replacement Calibration Gas - 99.999% by volume Methane (34 Liter)

    Industrial Scientific 1810-2312 Replacement Calibration Gas - 99.999% by volume Methane (34 Liter)

    $62.00
    99.999% by volume Methane Calibration Gas, 34 Liter Steel Cylinder (Industrial Scientific 18102312 Equivalent). RFID tag is not included.
  2. Industrial Scientific 1810-1378 Replacement Calibration Gas - 50% LEL Methane (103 Liter)

    Industrial Scientific 1810-1378 Replacement Calibration Gas - 50% LEL Methane (103 Liter)

    $145.00
    50% LEL Methane Calibration Gas, Balance Air, 103 Liter Steel Cylinder (Industrial Scientific 18101378 Equivalent). RFID tag is not included.
  3. Industrial Scientific 1810-5106 Replacement Calibration Gas - 1000 PPM Methane (34 Liter)

    Industrial Scientific 1810-5106 Replacement Calibration Gas - 1000 PPM Methane (34 Liter)

    $62.00
    1000 PPM Methane Calibration Gas, Balance Air, 34 Liter Steel Cylinder (Industrial Scientific 18105106 Equivalent). RFID tag is not included.
  4. RKI Instruments 81-0010RK-03 Replacement Calibration Gas - 10% LEL Methane (103 Liter)

    RKI Instruments 81-0010RK-03 Replacement Calibration Gas - 10% LEL Methane (103 Liter)

    $145.00
    10% LEL Methane Calibration Gas, Balance Air, 103 Liter Steel Cylinder (RKI Instruments 81-0010RK-03 Equivalent).
  5. RKI Instruments 81-0086RK-03 Replacement Calibration Gas - 5000 PPM Methane (103 Liter)

    RKI Instruments 81-0086RK-03 Replacement Calibration Gas - 5000 PPM Methane (103 Liter)

    $145.00
    5000 PPM Methane Calibration Gas, Balance Air, 103 Liter Steel Cylinder (RKI Instruments 81-0086RK-03 Equivalent).
  6. RKI Instruments 81-0012RK-21 Replacement Calibration Gas - 25% LEL Methane (34 Liter)

    RKI Instruments 81-0012RK-21 Replacement Calibration Gas - 25% LEL Methane (34 Liter)

    $62.00
    25% LEL Methane Calibration Gas, Balance Air, 34 Liter Steel Cylinder (RKI Instruments 81-0012RK-21 Equivalent).
  7. RKI Instruments 81-0011RK Replacement Calibration Gas - 10% LEL Methane (17 Liter)

    RKI Instruments 81-0011RK Replacement Calibration Gas - 10% LEL Methane (17 Liter)

    $50.00
    10% LEL Methane Calibration Gas, Balance Nitrogen, 17 Liter Steel Cylinder (RKI Instruments 81-0011RK Equivalent).
  8. RKI Instruments 81-0013RK-05 Replacement Calibration Gas - 50% LEL Methane (58 Liter)

    RKI Instruments 81-0013RK-05 Replacement Calibration Gas - 50% LEL Methane (58 Liter)

    $125.00
    50% LEL Methane Calibration Gas, Balance Nitrogen, 58 Liter Aluminum Cylinder (RKI Instruments 81-0013RK-05 Equivalent).
  9. RKI Instruments 81-0079RK-03 Replacement Calibration Gas - 500 PPM Methane (103 Liter)

    RKI Instruments 81-0079RK-03 Replacement Calibration Gas - 500 PPM Methane (103 Liter)

    $145.00
    500 PPM Methane Calibration Gas, Balance Air, 103 Liter Steel Cylinder (RKI Instruments 81-0079RK-03 Equivalent).
  10. RKI Instruments 81-0012RK Replacement Calibration Gas - 50% LEL Methane (17 Liter)

    RKI Instruments 81-0012RK Replacement Calibration Gas - 50% LEL Methane (17 Liter)

    $50.00
    50% LEL Methane Calibration Gas, Balance Air, 17 Liter Steel Cylinder (RKI Instruments 81-0012RK Equivalent).
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