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 Bump Gas Aerosol with Hydrogen Sulfide (H2S) surrogate blend of 15% hydrogen. Balance Nitrogen, 1 Liter, test both low and high alarm settings of H2S gas detectors. (typical 10-20 ppm)