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AimSafety Calibration Gas Carbon Dioxide with Nitrogen (N2) Balance 34L 20,000 ppm is fully compatible with PM150-CO2 Carbon Dioxide (CO2) Single-Gas Monitor.
FAQs: How Often Do I Need To Calibrate My Monitor?
Note: This item ships via UPS Ground due to HazMat restrictions and isn't available for expedited shipping. Calibration gas is not returnable. Please check your selection carefully before ordering.