For diluting samples with air in a fixed ratio for approximate measurement of gas concentrations above LEL (Use 10:1 or 20:1 dilution tubes) or where the sampled atmosphere may be oxygen deficient (Use 1:1 dilution tubes).
MSA's Gas Miser® Demand Regulator is the most advanced, yet simple-to-use calibration gas delivery system available. Made of nickel-plated brass and polished aluminum (especially important for reactive gases), the Gas Miser Demand Regulator can supply gas flow from 0.1 lpm to 3.0 lpm.