The Bühler GAS 222.21 Heated Gas Sampling Probe is an advanced industrial extraction unit engineered by Bühler Technologies GmbH (Germany). Specially developed to meet stringent continuous emission monitoring system (CEMS) requirements and industrial process control applications, it operates reliably in power generation, cement manufacturing, chemical processing, metallurgy, and oil refining facilities.

A defining feature of the GAS 222.21 model is its integrated shut-off valve located directly at the probe head. This allows maintenance technicians to isolate the sample gas line from the process stream during filter element replacements, routine cleaning, or blowback procedures. This shut-off capability guarantees operator safety and prevents high-temperature or toxic process gases from escaping.

Furthermore, the unit incorporates a self-regulating electric heating system that maintains a uniform probe temperature up to 200°C (392°F). This continuous heat prevents moisture condensation, acid dew point precipitation, and fine dust adhesion on the filter element. Combined with the pneumatic blowback cleaning feature, the Bühler GAS 222.21 delivers uninterrupted sampling operation and ensures highly accurate, repeatable analysis results.

• Manufacturer: Bühler Technologies GmbH
• Country of Origin: Germany
• Product Series: Heated Gas Sampling Probe Series with Shut-Off Valve
• Model: GAS 222.21
• Heating Temperature: Self-regulating, maintaining temperatures up to 200°C (392°F)
• Maximum Inlet Sample Gas Temperature: Up to 600°C (1112°F) (Depending on optional sampling tube selected)
• Isolation Valve: Integrated manual/pneumatic shut-off valve for safe process isolation
• Maximum Operating Pressure: 6 bar (87 psi)
• Ambient Temperature Range: -20°C to +60°C
• Wetted Materials: Stainless Steel 1.4571 (SS316Ti), Ceramic, FKM
• Internal Filter Element: Ceramic or SS316L Stainless Steel, standard pore sizes 2 µm / 5 µm
• Blowback Mechanism: Integrated pneumatic backpurge port for automated filter element cleaning
• Calibration Connection: Integrated test gas port for system validation
• Mounting Flange: DN65 PN6 or ANSI 3" 150 lbs
• Power Supply: 115V AC or 230V AC, 50/60 Hz
• Ingress Protection Rating: IP55 / IP65 (Weather-resistant design suitable for outdoor installation)