The Bühler Technologies GAS 222.15-MA Heated Gas Sampling Probe is a specialized industrial gas extraction unit belonging to the premium GAS 222 Series developed by Bühler Technologies (Germany). The "-MA" designation identifies the integration of a manual backpurge valve assembly, providing field engineers with an effective tool for maintaining high-dust sample streams in Continuous Emission Monitoring Systems (CEMS) and online gas analytics.

A major feature of the Bühler GAS 222.15-MA is its built-in manual backpurge valve system. This allows maintenance personnel to connect a compressed air line and manually trigger high-pressure blowback cleaning cycles directly at the probe installation site. Periodic blowback dislodges accumulated particulate cake from the filter element, keeping sample lines clear and guaranteeing stable sample gas flow rate to downstream analytical instruments.

In addition, the GAS 222.15-MA incorporates the proven features of the 222.15 architecture: an electrically heated probe body with self-regulating heating elements and an integrated process shut-off valve. Operating at a constant elevated temperature between 180°C and 200°C, the probe prevents water vapor condensation and acid dew point precipitation when sampling aggressive flue gases containing SO2, NOx, HCl, or HF. The process isolation ball valve enables safe, tool-free filter element replacement without stopping main plant operations or risking toxic gas leaks.

Constructed from heavy-duty corrosion-resistant wetted materials such as stainless steel 1.4571 (SS316Ti), Hastelloy, or PTFE coatings, the GAS 222.15-MA is manufactured in Germany under strict ISO quality management protocols. It represents the premier sampling probe choice for high-moisture, high-dust industrial gas extraction applications across power generation, cement manufacturing, petrochemical plants, and waste incinerators.

• Manufacturer: Bühler Technologies
• Origin: Germany
• Product Series: GAS 222 Series
• Model: GAS 222.15-MA
• Key Feature: Electrically Heated Gas Sampling Probe with Integrated Process Shut-off Valve & Manual Backpurge Assembly
• Backpurge Feature: Integrated manual backpurge valve assembly (Manual Actuation / Blowback)
• Heating System: Electrically heated with self-regulating heating element
• Probe Body Temperature: Maintained at ~180°C to 200°C (prevents acid dew point condensation)
• Heating Power Supply: 115V / 230V AC, 50/60 Hz
• Process Isolation Valve: Integrated Ball Valve / Mechanical Process Shut-off
• Filter Element Options: Ceramic / PTFE / Stainless Steel Mesh (1 µm to 10 µm porosity)
• Wetted Materials: Stainless Steel 1.4571 (SS316Ti) / Hastelloy / PTFE
• Sample Gas Process Temperature: Up to 600°C / 1000°C / 1400°C (depending on sampling tube selection)
• Max Operating Pressure: Up to 6 bar
• Flange Connection: DN65 PN6 / ANSI 3" 150 lbs (or custom flange configurations)
• Sample Gas Outlet Connection: Female thread G 1/4" or NPT 1/4"
• Ingress Protection Rating: IP55 / IP65