The D171 is a stand-alone fire & flame detector in a watertight NEMA 4X (IP66, 67) and explosion-proof Stainless Steel enclosure designed for indoor/outdoor Class I, Div. 1 (Zone 1) Installations. The Detector is supplied with Alarm / Auxiliary / Fault relays, 4-20 mA analog and RS485 outputs. The detectors can store 200 events and 6 FireGraphs in its FRAM memory.
Our D171 1IR+UV Multi -Spectrum Flame Detectors are the most advanced optical flame detectors designed and optimized to respond to both Hydrocarbon based fires while rejecting False Alarm sources.
The D171 model senses UV radiation in the Ultraviolet spectrum and infrared radiation in one discrete band of the IR spectrum for detecting fires. Flame response and false source rejection for theD171 model is accomplished by utilizing the Convolution Method and Advanced DSP (Digital Signal Processing) in conjunction with hard coded Algorithms identifying specific wavelengths of Energy.
The Detectors is able to respond to Hydrocarbon fires at distances of 100+ feet, All this while rejecting False sources.
| Multi-Spectrum Detection | 1 IR + UV design optimized for hydrocarbon fires with high false alarm rejection. |
| Outputs | Alarm, fault, and auxiliary relays; 4–20 mA analog output; RS485 Modbus. |
| Event Logging | Stores 200 event logs and 6 FireGraphs in FRAM memory. |
| Adjustable Sensitivity | Multiple selectable sensitivity levels for varied operating environments. |
| Automatic Self-Test | OptiRadar® technology continuously monitors circuitry and optical path integrity. |
| Enclosure | Explosion-proof 316 stainless steel, NEMA 4X (IP66/IP67), suitable for Class I, Div. 1 (Zone 1) installations. |
| Test Mode | Manual test mode simplifies on-site detector verification. |
| Installation | Pluggable connector and modular electronics simplify installation and maintenance. |
| Field Wiring Compartment | Separate isolated wiring compartment improves safety and simplifies connections. |
| Warranty | Made in the USA with a 5-Year Warranty. |
| General | |
|---|---|
| Field of View | 90° |
| Spectral Sensitivity | UV: 180–260 nm; IR: 4.3–4.6 µm (1 discrete band) |
| Detection Range | Model D171: 100 ft (30.5 m) n-Heptane fire |
| Response Time | Alarm: 3–5 seconds |
| Sensitivity Range | Low / High |
| Electrical | |
|---|---|
| Operating Voltage | 24 VDC nominal (18–31 VDC), regulated |
| Wiring | 12–22 AWG (3.3–0.33 mm²) |
| Conduit Entries | Standard: 2 × M25; Optional: M25 × ¾ in NPT adapter |
| Power Consumption | Standby: 60 mA @ 24 VDC; Alarm: 90 mA @ 24 VDC; Optional Heater: +120 mA |
| Output Relays | Alarm, Auxiliary, Fault (SPDT), contacts rated 2 A @ 24 VDC |
| Relay Operation | Alarm & Auxiliary: De-energized; Fault: Energized |
| Auxiliary Relay Delay | 0.3, 3, 10, or 20 seconds |
| Visual Indications | Green LED (Normal), Red LED (Alarm), Amber LED (Fault) |
| Communication | RS485 Modbus |
| Analog Output | 0–20 mA stepped source |
| Mechanical | |
|---|---|
| Enclosure Type | 316 Stainless Steel |
| Weight | 10 lb (4.5 kg) |
| Optional Mounting | Stainless steel swivel arm, 6.6 lb (3 kg) |
| Environmental | |
|---|---|
| Enclosure Rating | NEMA 4 & 4X, IP66/IP67 |
| Operating Temperature | -40°F to +185°F (-40°C to +85°C) |
| Humidity Range | 5–95% RH, non-condensing |
| Vibration | Meets or exceeds MIL-STD 810C |
| Oil and Gas Facilities |
| Refineries & Cogeneration Plants |
| Compressor Stations |
| Chemical & Hydrogen Plants |
| Crude Oil & Products Tank Farms |
| LPG / LNG Facilities |
| Fuel Terminals |
| Marine Fuel Loading & Unloading |
| Airports & Aircraft Hangars |
| Industrial Warehouses |
| Battery Rooms & Charging Facilities |
| Paint and Solvent Storage Facilities |
| Incinerators |
| Waste Disposal Facilities |
| Power Plants |
| Environmental Testing | Meets or exceeds MIL-STD 810C |
| Flame Detector Standard | FM3260-2003 compliant |
| DA-001 | 316 Stainless Steel Swivel Mounting Arm Assembly |
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