SKH047M - Standard Flame Sensor

  • World’s Smallest Flame Sensor 
  • High-Sensitivity & Fast Flame Detection Using UV Technology
  • Detects a flame as small as a lighter flame (2cm high) from 10m away.
    Detects a 1m-high flame from approximately 70m away.
    Fastest detection time: 0.5 seconds.

Dustproof & Waterproof (IP64 Compliant)
Suitable for outdoor installation.

High-Sensitivity & Fast Flame Detection Using UV Technology
  Detects a flame as small as a lighter flame (2 cm high) from 10 m away.
  Detects a 1 m-high flame from approximately 70 m away.
  Fastest detection time: 0.5 seconds.

Versatile Output Functions
  Supports both relay contact and open collector output as standard.
  Can be connected to alarm buzzers, rotating lights, and voice synthesis units.
  Compatible with third-party alarm systems.

World’s Smallest Flame Sensor
  The smallest UV-based flame sensor in the world.

Detection Timer Function
  Helps prevent false alarms with adjustable timer settings.
  Easily configurable via DIP switch on the back (Range: 0.5 s, 1 s to 31 s, adjustable in 1-second increments).
  ※ Restart the power after changing the settings.

Standard Mounting Bracket Included
  Equipped with a mounting bracket for quick and easy installation.

Product Specifications
Product NameStandard Fire Sensor
Model NumberSKH047M
Input VoltageDC 7~24V
Wiring4 wires (2 power wires, 2 output wires)
Power ConsumptionStandby mode: ≤ 20mA / Fire detection mode: ≤ 60mA (at 12V DC, room temperature)
Operating Temperature-10℃ to +60℃ (No condensation)
Detection MethodUltraviolet (UV) detection (Detection wavelength: 185nm–260nm)
Detection DistanceDetects a 2cm flame from a distance of 10m
Detection Angle120° left/right, 120° up/down (±60° from the sensor front)
Detection Timer FunctionAdjustable from 0.5s, 1s to 31s (Configured via DIP switch)
Factory Default Setting: 4s
Fire Detection OutputRelay output (Normally Open Contact): AC 125V-0.5A / DC 24V-1A
※Note: Can be customized with Normally Closed Contact (b-contact) or Open Collector Output upon request.
Alarm Output Hold FunctionAlarm Output Hold Function
※Note: Alarm output turns OFF 30 seconds after UV detection stops.
Monitoring LocationIndoor & Outdoor (Equivalent to IP64)
Operating Indicator (On-device LED)LED turns blue when detecting fire
External Dimensionsφ72.8mm × 34.5mm (including spacer)
WeightApproximately 75g (including standard cable)
Casing MaterialFlame-retardant ABS (UL94 standard)