Measurement range of 0 to 5% O2 in H2 High-precision measurement performance Fast measurement response time Meets the requirements of IEC 61508 standard (SIL2 capability). Certified for hazardous areas (Exd) - UKEX, ATEX, IECEx, cQPSus Low cost of ownership due to minimal maintenance. The glass screen allows for operation, configuration, and calibration. Analog and digital outputs, and user-configurable alarm setting points.