The Bühler GAS 222.31 Heated Gas Sampling Probe is a comprehensive industrial sample extraction unit engineered by Bühler Technologies GmbH (Germany). Designed specifically for heavy dust loads and elevated temperatures, this probe combines high-efficiency sample filtration with maximum operator safety in Continuous Emission Monitoring Systems (CEMS) and industrial process control applications.

A key feature of the GAS 222.31 model is the dual integration of a tool-free, quick-release filter cover mechanism (Easy-Lock System) and a built-in shut-off valve directly at the probe head. The shut-off valve enables technicians to isolate the sample line from the hot process gas stream during routine filter element replacements or maintenance operations. This guarantees worker safety and prevents toxic or hazardous process gases from leaking into the surrounding environment.

Equipped with an integrated self-regulating electric heating element, the probe head maintains a constant operating temperature of up to 200°C (392°F). Continuous heating prevents water vapor condensation, acid dew point precipitation, and dust adhesion on the filter element, protecting sample integrity prior to analyzer delivery. Paired with a pneumatic blowback port for automated online filter cleaning, the Bühler GAS 222.31 delivers continuous 24/7 reliability with minimal maintenance demands.

• Manufacturer: Bühler Technologies GmbH
• Country of Origin: Germany
• Product Series: Heated Gas Sampling Probe Series for High Dust Loads with Shut-Off Valve
• Model: GAS 222.31
• Heating Temperature: Self-regulating, maintaining a constant temperature 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 gas isolation
• Filter Replacement Mechanism: Tool-free Easy-Lock quick-release cover
• 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 online filter cleaning
• Calibration Connection: Integrated test gas port for system integrity 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 (Outdoor weather-proof design)