(Click to see larger image) This precision single-stage pressure regulator performs as well as many two-stage regulators. It attaches to a high-pressure CO₂ cylinder, via the standard CGA-320 tank fitting, and maintains a stable lower pressure, set by the user. Nice clear gauges let you monitor remaining pressure in the cylinder and the set/delivered pressure on the low pressure side. TREG-CO2 is ideal for attaching a CO₂ cylinder to our DigiTherm? CO₂ Incubator.