Gas probe XS11.QE

General Information
The main part of the QE-Probe XS11.QE is a potentiometric solid electrolyte cell (zirconia sensor). The sensor continuously receives a gas sample via gas flow over a heated catalyst that decomposes NH3. Cell and catalyst are kept at 760 °C to avoid unwanted reaction products (e.g. CH4). From the probe signal the quotient of partial pressures of oxygen-reactive furnace gases at equilibrium can be calculated (e.g. H2O and H2 or H2O+CO2 and H2+CO in the water-gas equilibrium).

Key properties
The QE-Probe is calibration-, drift- and maintenance-free. Use of high-quality components and materials ensures high long-term stability.

Applications
The QE-Probe is used in thermal hardening technology for nitriding and nitrocarburizing processes to monitor the protective gas atmosphere. By combining signals from a QE-Probe and a Q-Probe, the nitriding number KN and, if applicable considering the fresh-gas composition, the carburizing number KC can be set and controlled.

Technical Data XS11.QE

• Model: XS11.QE
• Length: 300...1800 mm
• Diameter: 25 mm
• Weight: 1...3.5 kg
• Material: 1.4841
• Clamp head dimensions: approx. 90x90x200 mm
• Protection degree: IP20
• Power supply: 24 V (DC or AC)
• Heating resistance AC / DC: 20 Ω
• Heating current AC / DC: 1.2 A
• Heating power AC / DC: 30 VA
• Range (output): 0...1500 mV
• Accuracy: < 5 % relative error
• Sensor temperature (in the probe head): 760 °C
• Offset: <10 mV
• Thermocouple: type B (800 °C corresponds to 3.2 mV)
• Flow measuring gas: max. 1 l/h
• Clamp assignment: (1) Ground = AGND; (2) Sensor voltage = -Vz; (3) Thermal voltage = +Vt; (4) Heating = VH; (5) Heating = VH

Mounting recommendation

• Stuffing box or cutting-ring fitting

Datasheet
Product datasheet (PDF) is available.

Characteristics / Technical specifications

• Model: XS11.QE
• Length: 300...1800 mm
• Diameter: 25 mm
• Weight: 1...3.5 kg
• Material: 1.4841
• Clamp head dimensions: approx. 90x90x200 mm
• Protection degree: IP20
• Power supply: 24 V (DC or AC)
• Heating power: 30 VA (heating resistance 20 Ω, heating current 1.2 A)
• Range (output): 0...1500 mV
• Accuracy: < 5 % relative error
• Sensor temperature in the probe head: 760 °C
• Offset: <10 mV
• Thermocouple: type B (800 °C corresponds to 3.2 mV)
• Max. flow measuring gas: 1 l/h