DURÁN co carbon monoxide detector durpark 0-300ppm (grey ring) includes connection base, simplified calibration and maintenance, algorithms for calibration, gain and sensitivity without the need for gas, structural design to prevent leaks. service life 5 years. certified. • une 23.300:1984 standard, coverage of 200 m2. low-cost electrochemical sensor, three-wire installation. addressing from 1-16 per zone