Potentiometric oxygen probes developed for the exhaust gas measurements in motor vehicles (λ-probes) are frequently used in industrial equipment. Due to their construction, these probes have some disadvantages: because of the uncontrolled heating (steady working voltage) and ceramic coating of the electrodes (which increase the diffusion of special gas components) significant measuring errors can result.
The
ZIROX miniature probes MS27 and SS27 with controlled heater and integrated primary electronics features high accuracy at comparatively lower costs. The main part is the approved ZIROX potentiometric zirconia-based solid electrolyte cell (drift-, calibration- and maintenance-free). The use of high-quality components and materials guarantees high long-term stability.
The SS27 was developed for trace measurements under oxidizing conditions. The MS27 was constructed for reducing conditions or oxygen concentration of more than 100 ppm. Both probe types only differ in the type of sensor element.
Thông số kỹ thuật Miniature Probe SS27/MS27
| Installation length | 65 mm (incl. M18x1.5), 75 mm (DN40KF) |
| Diameter | 10 mm |
| Weight | 0.5 kg |
| Dimension clamp head | 64 x 58 x 36 mm |
| Protection degree | IP42, others on request |
| Power supply | 24 V DC |
| Power consumption | 17 W |
| Warm-up | approx. 5 min |
| Sensor voltage (raw signal) | 0...200 mV (0...300 mV on request) |
| Range (SS27) | 15 ppm...20.6 Vol.-% O2 (0...200 mV)
0.13ppm...20.6 Vol.-% (0...300 mV) |
| Accuracy | < 5 % rel. error |
| Measuring gas temperature | max. 300 °C |
| Probe working temperature | 700 °C |
| Surrounding conditions probe head | max. 50 °C, rel. humidity < 80 % |
| Offset | approx. -2...-8 mV (compensable) |
| Output signal | 4-20 mA (0-5 V, 0-10 V on request) |
| Plug assignment: | |
| (1) Analog output | + IA |
| (2) Analog output | GND IA |
| (3) Power supply | GND VB |
| (4) Power supply | + 24 V VB |
| (5) Relay | RDY |
