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SST Screwfit - Zirconium Dioxide Oxygen Sensors
SST manufacture the Screwfit zirconium dioxide oxygen sensors, which is ideal for applications in the combustion industry. The Screwfit zirconium dioxide oxygen sensors have a threaded probe design making it easy to install. Suitable for combustion control within industrial coal/oil/gas/biomass boilers, continuous emission monitoring systems and controlled atmosphere monitoring. SST’s range of Screwfit zirconium dioxide oxygen sensors use a unique closed loop measurement system. While the sensor continuously measures the oxygen level, a heartbeat signal is also generated providing an immediate warning of any failures.
Their long operating life is due to the non-depleting sensor cell technology. No reference gas is required and easy single point calibration can be performed in any known gas including fresh air.
The oxygen sensor can cope with extreme temperature levels from -100°C up to 250°C and has a rapid response time of less than four seconds. In addition to this, the sensor offers a linear output signal, a lifetime of up to 10 years (depending on the application), and covers an oxygen range from 0.1 to 100% O2.
All of SST’s zirconia oxygen sensors require interface electronics to operate which SST can provide (see related products below). For high volume applications, we can work with you to design your own electronics, saving you time and money.
- Zirconium dioxide (ZrO2) sensing elements
- All stainless steel construction
- Screw mounting (M18 x 1.5) ; leadwire & connector terminations
- Requires an external interface board to operate
- No reference gas required
- No need for temperature stabilisation
- Integral heating element
- Long life, non-depleting technology
- Rugged construction
- Easy to install
- Allows sensor to operate in harsh environments ; no need to replace electronics at end of sensor life
- Can operate in high temperature, humidity and pressure environments
- Accurate, fast response <4s
- Full technical and application support available
- Heater voltage
- Operating: 4.35VDC ± 0.1VDC (1.85A)
- Standby: 2VDC (0.85A)
- Pump impedance at 700°C3: < 6kΩ
- Permissible gas temperature: -100°C to +250°C
- Gas flow rate: 0—10 m/s
- Repetitive permissible acceleration: 5g
- Incidental permissible acceleration: 30g
- Mounting thread: M18 x 1.5
- OUTPUT VALUES
- Oxygen pressure range: 2mbar—3bar max
- Accuracy: 5mbar max
- Internal operational temp: 700°C
- Response time (10—90% step): < 4s
- Warm up time (prior to sensor operation): 60s
- Warm up time (from standby): 20s
- Output stabilisation time: ~ 180s