The Bühler Technologies GAS 222.20-HT High-Temperature Heated Gas Sampling Probe is a specialized extraction unit engineered for harsh, high-dust, and high-temperature gas analysis applications by Bühler Technologies (Germany). Building upon the rugged GAS 222.20 high-dust architecture, the "HT" (High Temperature) designation signifies an upgraded high-capacity electric heating configuration designed to sample flue gas streams under extreme thermal and particulate stress.

A central engineering advantage of the Bühler GAS 222.20-HT is its combination of an expanded filter chamber with high-duty heating element insulation. Maintaining an elevated probe body temperature up to 200°C prevents sample gas cooling below its acid dew point during filtration. This avoids moisture condensation on the filter element, eliminating particulate caking (mudding) and protecting downstream sample lines and gas analyzer sensors from corrosive chemical attack.

Operationally, the probe features a spacious filter housing equipped with a tool-free quick-release clamp mechanism, enabling maintenance personnel to inspect or swap out filter elements rapidly. It also features an integrated backpurge (blowback) port, facilitating automated high-pressure compressed air cycles to dislodge accumulated dust cake from the external filter surface periodically.

Manufactured 100% in Germany from heavy-duty, heat and corrosion-resistant wetted materials including stainless steel 1.4571 (SS316Ti), Hastelloy, and technical ceramics, the Bühler Technologies GAS 222.20-HT is the premier sampling probe choice for Continuous Emission Monitoring Systems (CEMS) in cement kilns, metallurgical smelting furnaces, coal-fired power plants, and high-temperature waste incineration lines.

• Manufacturer: Bühler Technologies
• Origin: Germany
• Product Series: GAS 222 Series
• Model: GAS 222.20-HT
• Key Feature: High-Temperature Electrically Heated Gas Sampling Probe for High Dust Applications
• Heating System: High-capacity electrical heating assembly for high temperature operation
• Probe Body Temperature: Maintained up to 200°C max (prevents acid dew point condensation)
• Heating Power Supply: 115V / 230V AC, 50/60 Hz
• Filter Mechanism: Large surface area filter element with tool-free quick-release clamp
• Filter Element Options: Ceramic / PTFE / Stainless Steel Mesh (1 µm to 10 µm porosity)
• Wetted Materials: Stainless Steel 1.4571 (SS316Ti) / Hastelloy / PTFE / Ceramic
• 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"
• Backpurge Feature: Integrated compressed air blowback connection
• Ingress Protection Rating: IP55 / IP65