Gas probe SS31H

oxygenrugged

General information
ZIROX flue gas probes SS31/SS31H are robust oxygen sensors for lambda determination in large-scale combustion plants and for measuring the oxygen partial pressure in furnace atmospheres. The probes are calibration-, drift- and maintenance-free. An integrated heater maintains the operating temperature, preventing measurement bias caused by cooling of the sampled gas in the suction line. High-quality materials and components ensure long-term stability.

Applications

• Flue gas measurements in power plants and large combustion units
• Process gas monitoring in industrial furnaces and kilns

Technical data - Oxygen Probe SS31H
Length: 300...1800 mm
Diameter: 25 mm
Weight: 1...3.5 kg
Material: Stainless steel 1.4841
Clamp head dimensions: 75 x 80 x 60 mm
Clamps: 5 x Phönix MBK 2,5/E
Protection degree: IP52 (IP65 on request)
Power supply: 36 V (DC or AC)
Heater resistance AC / DC: 8 Ohm
Heating current AC / DC: 4.5 A
Heating power AC / DC: 160 VA
Heater control: PWM, max. cycle time 500 ms
Range: -0.01...20.6 Vol.-% O2
Accuracy: < 5 % relative error
Working temperature (probe): 700...800 °C
Sensor offset: -2 mV...-10 mV
Sensor voltage (5.0 Vol.-%, 800 °C): -33.1 mV
Thermocouple: Type B (800 °C ≙ 3.2 mV)
Max. measuring gas flow: 10 m/s
Reference gas: ambient air
Reference gas flow: 5...10 l/h

Clamp assignment

• (1) Ground — AGND
• (2) Sensor voltage — -Uz
• (3) Thermal voltage — +Ut
• (4) Heating — UH
• (5) Heating — UH

Mounting recommendation

• Use stuffing box or cutting-ring fitting for reliable sealing

Options

• Test gas channel for in-situ functional checks
• Immersion sleeve for probe protection at gas flow > 10 m/s

Characteristics / Technical specifications

• Model: SS31 / SS31H (Oxygen Probe SS31H)
• Length: 300...1800 mm
• Diameter: 25 mm
• Weight: 1...3.5 kg
• Housing material: Stainless steel 1.4841
• Clamp head: 75 x 80 x 60 mm
• Ingress protection: IP52 (IP65 on request)
• Supply voltage: 36 V (DC or AC)
• Heater: 160 VA, 4.5 A, 8 Ohm
• Heater control: PWM, max. cycle time 500 ms
• Measuring range O2: -0.01...20.6 Vol.-%
• Accuracy: < 5 % relative error
• Probe operating temperature: 700...800 °C
• Thermocouple: Type B
• Max. gas flow: 10 m/s (use immersion sleeve if higher)
• Reference gas: ambient air, flow 5...10 l/h