The Bühler Technologies GAS 222.11 Ex1 Explosion-Proof Gas Sampling Probe is a specialized extraction unit engineered for stringent hazardous zone applications by Bühler Technologies (Germany). Fully certified under European ATEX directives for Zone 1 (Gas) and Zone 21 (Dust) environments, the GAS 222.11 Ex1 provides a safe, reliable interface for extracting representative gas samples for CEMS and online gas analyzers operating in explosive atmospheres.

A defining feature of the GAS 222.11 Ex1 is the combination of certified explosion protection with an integrated mechanical shut-off valve (ball valve). This allows maintenance technicians to isolate the sample line directly at the probe head, facilitating safe, tool-free inspection or replacement of the internal filter element. Process line isolation eliminates gas leaks and prevents personnel exposure to toxic or high-pressure flue gases without requiring a full plant operational shutdown.

In terms of material construction, the GAS 222.11 Ex1 utilizes heavy-duty corrosion-resistant materials such as stainless steel 1.4571 (SS316Ti), Hastelloy, or PTFE-coated components. The high-capacity internal filter element traps fine particulates to protect downstream analyzer cells from contamination. The probe also features an integrated backpurge connection for automated compressed air blowback to clean the filter surface periodically.

Manufactured in Germany under strict ISO and ATEX quality management protocols, the Bühler Technologies GAS 222.11 Ex1 is the premier sampling probe solution for refineries, chemical processing plants, thermal power stations, and incineration facilities requiring maximum explosion safety and operational uptime.

• Manufacturer: Bühler Technologies
• Origin: Germany
• Product Series: GAS 222 Ex Series
• Model: GAS 222.11 Ex1
• Key Feature: Explosion-Proof Gas Sampling Probe with Integrated Shut-off Valve
• Explosion Protection Certification:
  - ATEX Zone 1 / Zone 21 (Ex II 2G Ex mb IIC T4 Gb / Ex II 2D Ex mb IIIC T135°C Db)
• Process Isolation Valve: Integrated Ball Valve / Mechanical 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)
• Probe Body Temperature: Up to 200°C max
• 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"
• Backpurge Feature: Integrated compressed air blowback connection
• Ingress Protection Rating: IP65