Detection Principle Photoionization Detection (PID) Measurement Range 0-1 ppm to 0-10,000 ppm (selectable ranges, e.g., 0-10/100/1000 ppm) UV Lamp Energy Standard 10.6 eV (other options: 11.7 eV) Accuracy ±2% of reading or ±1% of full scale (whichever is greater) Response Time (T90) Typically < 3 seconds Sample Method Diffusion or pumped (integrated sample pump) Output Signals - Analog: 4-20 mA DC, isolated - Alarms: 2+ SPDT relay outputs Power Supply 24 V DC (18-30 V DC range) Display Backlit LCD (concentration, status, alarms) Enclosure Rating IP66/IP67 (dust-tight, water-resistant) Operating Temperature -20°C to +50°C Calibration Field-configurable with standard calibration gases Safety Certifications ATEX, IECEx, FM (Zone 1/Division 1 hazardous areas)