SpyGlass SG50-F-IR3

Spyglass™ flame detectors offer the fastest detection of fires and explosions, providing the opportunity to reduce or prevent damage to property & equipment.

The SG50-F-IR3 flame detectors provide unrivalled response, high performance, and reliable detection for hydrocarbon fires such as natural gas, gasoline, diesel, & jet fuels.

Rugged stainless steel construction and accessories such as weather shields, air shields, and pole mounts allow use in the most rugged and challenging conditions.


Technical Description – SpyGlass SG50-F-IR3 Triple IR Flame Detector

The Spyglass SG50 IR3 is the next generation of the IR3. It has been introduced to further enhance the protection and safety for these high risk and high value industries.

The Spyglass SG50 IR3 will detect fires and explosions extremely fast, thus allowing preventative action to be initiated even more rapidly and minimizing the consequences!

A Closer Look

The unmatched detection times and distances are:

  • Highest immunity to false alarm
  • Triple IR uses three wavelengths in the infrared spectrum from 4.0 to 5.0 μm to detect hydrocarbon fires.
  • HD, or composite, video output with automatic HD video recording of events on IR3-V
  • 5 selectable sensitivity levels
  • Ultra-fast detection within 40 milliseconds for fireballs or explosions
  • Fast flame detection, <1.5 s for standard fire up to 30 m. Option for <0.5s, in compliance with NFPA 33, available
  • Optimized CO2 L option for aircraft hangars, helipads & truck loading racks available
  • Detects up to 262 ft. (80m) for a 1 ft (0.1m²) n-heptane fire
  • Event logger: Alarms, faults (& videos for IR3-V) are logged to non-volatile memory
  • Universal outputs, 3 and 4 wire, 4-20 mA sink / source, Fire, Auxiliary and Fault Relays. RS485 port using Modbus RTU
  • Built-in-Test (BIT) – Automatic and manual internal self-test of window cleanliness and the overall operation of the detector.
  • HART® 7 units available – Easy configuration and diagnostic capability, including dirty optics warning for preventative maintenance needs.
  • Window heater to avoid condensation and icing.
  • Stainless steel tilt mount with horizontal and vertical adjustment
  • SIL 2 compliant – suitable for use as part of a SIL 2 compliant safety system

The Specs at a Glance

Technology Triple IR Flame Detector
Fire type Hydrocarbon fires
Detection time and distance 40ms for fast fire burst or explosion
1.5s for 1ft (0.1m2) n-heptane pan fire at 0–100 ft. (0–30m)
9.0s for 1ft (0.1m2) n-heptane pan fire at 100-262 ft (30-80m)
Sensitivity Range 5 ranges, Extreme, High, Medium, Low, Very Low
Field of view (IR detection) 90° Horizontal, 75° Vertical
Time Delay 0-30 seconds
Built in Test Automatic and Manual
Video Functionality – Only available on SG50-F-IR3-V
HD Video Colour HD as standard. Near -IR filtered option.
Video recording of event 1 minute pre-vent and up to 3 minutes post event.
 Output signal
Standard 3 wire and 4 wire (isolated) configurations (sink and source) 4-20Ma or 0-22ma (configurable by the user)
Relays SPST volt-free contacts rated 2A at 30 VDC 3 relays: Alarm & Auxiliary – normally open; Fault – normally closed
Visual Tri-colour LED (Green, Yellow, Red)
Modbus RTU compatible on RS-485
HART 7 Not available on base option
Digital (for video) IP network IEEE 802.3 100Base-T – Only on IR3-V
Composite Video NTSC or PAL – Only on IR3-V
Power supply 24 VDC nominal (18-32 VDC)
Power consumption Standby: 120mA 180mA all systems in operation (including window heater)
Connection 2x cable and conduit entries 3/4″ NPT(F) or M25x1.5
12-20AWG (2.5–0.35mm2)
Shielded cable recommended
Temperature Range Operating: -67°F to +185°F (-55°C to +85°C)
Storage: -67°F to +185°F (-55°C to +85°C)
Option Stainless steel weather cover, model FLS-WCO-S01
Humidity Up to 99% (RH), non-condensing
Ingress IP66 & 68 (2m, 24hr); NEMA 4X & 6P
Mechanical  SG50-F-IR3
Size 5.51 x 3.54 x 3.54″ (140x90x90mm)
Weight Detector (Stainless Steel 316): 6.6 lbs. (3.0 kg)
Tilt mount (Stainless Steel 316): 3.3 lbs. (1.5 kg)

Data Sheet – SG50-F-IR3