Zirconia trace oxygen O2 sensor 02-661

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Product information
02-661 NTron Oxygen sensor SenzTx-100 (0–1000 ppm) O2. Compact oxygen sensor/transmitter designed for low-level O2 monitoring. Minimum output ranges from 0–10 ppm are suitable for nitrogen generation and glovebox monitoring. The SenzTx transmitter is available in measuring ranges up to 0–96% O2 for oxygen concentrators and offers multiple process connection and output options for flexible integration.

Sensor construction
The main sensor body is manufactured from high-density PVDF and the front support ring is stainless steel. This construction delivers chemical resistance for most sampling atmospheres and compatibility with trace solvents and hydrocarbons in the sample gas; note that some zirconia sensors require high-temperature operation for certain ranges.

Installation flexibility
The compact SenzTx oxygen transmitter includes an integrated microprocessor and is designed for OEM installations with minimal user input. An optional flow-through sensor with orifice is available; with this option the sensor can accept up to 0.5 bar g and ensure correct flow through the sensing element, often eliminating the need for external flow control.

Recommendations to achieve better results and longer life

• Regular calibration: Calibrate the SenzTx on delivery or per site procedure to ensure accurate oxygen monitoring in N2 applications.
• Monitoring and maintenance: Continuously monitor O2 levels in the nitrogen output; inspect for irregularities and replace the sensor as required (typical zirconia cell life 3–5 years).
• Adjust N2 sample pressure and flow correctly: For accurate N2 purity measurement set sample pressure to a maximum of 0.3 bar with minimal flow from the product tank.
• Training and documentation: Train operators and maintenance staff on correct use, calibration and best practices for gas sampling and sensor care.

Technical specifications

• Product number: 02-661
• Model: SenzTx-100
• Brand: NTron
• Weight: 1 kg
• Measurement technology: Zirconia (ZR)
• Measurement range: 0 to 1000 ppm
• Output resolution (for %): 0.01%
• Output resolution (for ppm): 1 ppm
• Accuracy: +/-2% of reading (or 2 ppm O2) @ calibrated temperature and pressure
• Response time (T90): <10 seconds @ 25°C (within selected range)
• LDL (Sensitivity): 0.01% (when measuring %) / 1 ppm (when measuring ppm)
• Temperature range: -20°C to +50°C
• Pressure range: 900 to 1100 mBar abs
• Linearity: +/- 2% of reading
• Life expectation: 3-5 years
• Humidity: 0-95% RH non-condensing
• Shelf life: No shelf life specified