D381 Flame Detector DETECTORS INCORPORATED D381-21B1-A11

The DETECTORS INCORPORATED D381-21B1-A11 flame detector is a high-tech device that can find hydrocarbon, non-hydrocarbon, and hydrogen fires in tough industrial settings. This unit, made in the USA, is great for marine, oil and gas, and manufacturing applications because it responds quickly and rejects false alarms better than other units.

Key Features and Benefits

-> The D381-21B1-A11 has advanced DSP algorithms and UV and 3IR sensors that can find flames up to 80 feet away in 3 to 5 seconds. Its aluminium case has a NEMA 4X (IP66/67) rating, which means it can handle temperatures from -40°F to 185°F. It also has an optional heater for very cold weather.

-> Automatic self-test and OptiRadar® keep an eye on optics and electronics all the time, recording 200 events and 6 FireGraphs® to make sure they are working properly.

-> There are several outputs, such as SPDT alarm/auxiliary relays, an SPST fault relay, RS485 Modbus, and an optional 0-20mA analogue output that can be used with fire panels or PLCs.

-> High resistance to sunlight, welding, and hot objects makes sure that it works well without annoying alarms.

Technical Specifications

This flame detector operates on 24VDC (18-32V), drawing 60mA standby and 90mA in alarm, with a 90° field of view covering 1×1 ft n-heptane fires at 80 ft.​

Applications for D381-21B1-A11

• Put the D381-21B1-A11 in paint spray booths, places where solvents are stored, power plants, battery rooms, and ships to quickly find flames.
• For best coverage, place 1.5 to 2.5 times higher than the hazards at a 35 to 55 degree angle down. It is safe to use in Class I Div 2/Zone 2 areas because it is explosion-proof.

Easy Installation and Maintenance

Mount with a swivel bracket or a direct flange. For Division 2, wire according to NEC with simple screw terminals. Use IPA to clean the sapphire window every once in a while; you can do a manual test with a dedicated input, and you don’t need to calibrate it in the field. The green LED blinks normally, the red LED blinks for an alarm, and the amber LED blinks for a fault.