CalGasOnline is an authorized distributor of GASCO, manufacturer of calibration gas.
GASCO's precision and quality is consistent with NIST standards.
3-Day Lead Times, many in stock.
Gasco Calibration Gas Cylinder with Butane (C4H10) 0.45% vol. or 1.08% Vol. Balance Air. Available Sizes 17, 34, 105 and 221 Liters.