For optimum quality and process protection, the avoidance of oxygen, also as traces, is necessary in many technological applications. Due to the increasing adoption of a quality management system (e.g. ISO 9000), a constant monitoring and documentation of quality parameters becomes more important.
The compact oxygen analyzer SGM7 is based on the approved, drift-, calibration- and maintenance-free ZIROX® zirconia technique. It contains the measuring cell as well as the electronic unit for cell heating control, flow monitoring, integrated pump and signal processing. Via microprocessor, the measuring cell signal is processed according to the NERNST equation. The requested value is displayed as an analog current signal.
| Measuring range | 2.0 · 105...1 Vol.-ppm, (20.6...1x10-4 Vol-%), up to 10-20 Vol.-ppm possible (reducing conditions), range up to 100 Vol.-% on request |
| Accuracy | rel. error < 5% |
| Gas flow | 5 ... 10 l/h |
| Max. measuring gas pressure | 20 mbar overpressure |
| Max. measuring gas temperature | 80 °C at gas input |
| Interface | RS232 |
| Analog output | 0/4...20 mA, galvanically isolated, freely scalable, working resistance max. 500 Ω Option: 0/2...10 V, galvanically isolated, freely scalable |
| Gas input | Swagelok® 3 mm |
| Gas output | Tube nipple 3 mm |
| Working conditions | 10...45 °C, rel. humidity < 80% at 20 °C |
| Protection degree | IP40 |
| Dimensions (W x H x D) | 135 mm x 100 mm x 240 mm |