Oxygen probe SS20.BQ

redoxmonitoring

General information
The Q-Probe SS20.BQ is a potentiometric solid-electrolyte (zirconia) oxygen probe. Different oxygen activities at the electrodes (reference electrode exposed to ambient air) generate a voltage proportional to the logarithm of oxygen partial pressures. From the probe signal the quotient of partial pressures of gases reacting with oxygen can be calculated, enabling control of redox-related furnace atmospheres. The Q-Probe is calibration-, drift- and maintenance-free when used correctly. High-quality components ensure long-term stability.

Applications
The probe is designed for monitoring protective atmospheres and for controlling partial oxidation (redox quotient, oxidation character KO) in heat-treatment processes for metallic materials. It is also used in nitriding and nitrocarburizing processes. Combined with a QE-probe signal, the Q-Probe allows control of nitriding character KN and, taking unburnt gas into account, carburizing character KC.

Technical data Q-Probe SS20.BQ

• Length: 300...1800 mm
• Diameter: 25 mm
• Weight: 1...3.5 kg
• Material: 1.4841
• Clamp head dimensions: 75 x 80 x 60 mm
• Clamps: 3 x Phönix MBK 2.5/E
• Protection degree: IP52 (IP65 on request)
• Measuring range: 0...1500 mV
• Accuracy: < 5 % relative error
• Operating temperature: 500...1100 °C
• Thermocouple: type B (800 °C ≙ 3.2 mV)
• Reference gas: ambient air
• Reference gas flow: 5...10 l/h

Clamp assignment
(1) Ground: AGND
(2) Sensor voltage: -V_z
(3) Thermal voltage: +V_t

Mounting recommendation

• Stuffing box or cutting-ring fitting

Technical specifications (summary)

• Model: Q-Probe SS20.BQ
• Length range: 300...1800 mm
• Diameter: 25 mm
• Reference gas flow: 5...10 l/h