Product description: Input Voltage 24 vdc. Operating range is 18 to 32 vdc including ripple. Power Consumption 5 watts nominal, 7 watts maximum. Current Output Linear 4 to 20 ma current source (non-isolated) 4 to 20 ma output indicates 0 to 100% LFL detection range (standard) 23.2 ma indicates over-range condition (120% LFL) 0 to 2.4 ma levels indicate calibration, fault and fouled optics conditions. Detection Range 0 to 100% LFL. Gases Methane, Ethane, Propane, Butane, Ethylene, Propylene All devices are shipped with 0 to 100% LFL linear output for methane. 0 to 100% LFL outputs for the above standard gases are switch-selectable and can be set in the field. Response to other gases/vapors available. Accuracy * ±3% LFL from 0 to 50% LFL, ±5% LFL from 51% to 100% LFL. Stability (Temp) ** Zero: ±2% LFL from –40°F to +167°F (–40°C to +75°C). Span: ±5% LFL at 50% LFL from –13°F to +167°F (–25°C to +75°C) ±10% LFL at 50% LFL from –40°F to –13°F (–40°C to –25°C). Stability (Time) ** (12 months) ±2% LFL. Repeatability * Zero: ±1% LFL. Span: ±2% LFL at 50% LFL. Temperature Range Operating: –40°C to +75°C (–40°F to +167°F). Storage: –40°C to +85°C (–40°F to +185°F). Humidity 0 TO 99% relative humidity (non-condensing) Response Time (seconds) T50 T90 Ingress Protection IP66, NEMA 4. Wiring Five 22 AWG wires, 20 inches (50.8 cm) long. RFI/EMI Protection EN50081-1. Class B, EN50270: 1999, Type 2. Operates properly with 5 watt walkie talkie keyed at 1 meter. Shipping Weight Aluminum: 3 pounds (1.3 kilograms). Stainless Steel: 4.8 pounds (2.2 kilograms). Materials Aluminum (clear anodized) enclosure and weather protection baffles. Content: 0.8% to 1.2% Mg, 0.15% to 0.40% Cu. Stainless Steel (316 electropolished) enclosure. Polyphthalamide (PPA) weather protection baffle. Certification CENELEC: EEx d IIB+H2 T5-T6 | 
