HD Flame Detector

  • Sample of Forney’s HD Flame Detector Product
  • Dimension of Forney’s HD Flame Detector

The Forney High Definition (HD) Flame Detector integrates both Infrared (IR) and Ultraviolet (UV) optical sensors along with an amplifier and high speed signal processor. The high speed signal processor is able to analyze frequency resolution allowing for precise discrimination between multiple burners and background radiation. HD Detector includes two flame relays, one for signals from each optical sensor. Four different profiles are selectable for maximum flexibility under different operating conditions. 4 to 20mA analog outputs are provided for remote display options.

An industry first mobile app is available in two configurations from the Apple Store and Google Play. The Forney HD Detector app will allow the user to select a specific detector via Bluetooth. The user can then monitor the detector on their mobile device. A live Fast Fourier Transform (FFT) is also displayed. To tune the detector, the password protected, Forney HD Detector Pro app will allow the user to specify pick up and drop outs for flame on and flame off within the two user specified frequency ranges. Any fault codes are clearly shown with Reset capability. A PC based RS485 connection capability is also available.

A single, flexible 12 wire custom cable is available in multiple lengths to make field connects simple. In many cases the existing field cabling can be reused. (Existing cables for Forney D85, UniFlame I, and UniFlame II Detectors can be reused with transition adapters.)

Ambient Operating Temperature -30°C to 65° C (-22° F to 149° F)
Internal Operating Temperature Up to 85°C (185° F)
Ambient Storage and Transportation Temperature 20°C to 50°C (68°F to 122° F)
Relative Humidity 40°C (104°F), RH 95%
Vibration Sinusoidal Operating Frequency: 5 -200 Hz
Acceleration: 8G
Flammability Rating UL94 HB
Conformal Coatings
RoHS Compliant
Housing Material Engineered Polymer
Weight 1.2 Kg (2.7 lbs)
Degree of Protection IP66
Sight Tube Mounting 1” NPT
Lens Temperature Rating 538°C (1000° F)
Purge Air Flow Minimum 5 SCFM
Optical Sensitivity Responsive to oil, coal & gas flames using IR & UV spectrum
Power Supply 24 VDC ( +10 /- 15%)
Steady State Current 120 ma
Inrush Current 350 ma
Power Consumption 2.88 watt
External In-line Fuse 1 Amp Fuse Required
Heat Dissipation 1.2 Watt
Flame Relay Two (2) independent (fail safe)
Contacts SPST
24 VDC, 1 amp
Flame Failure Response Time (FFRT) 1, 2, 3, 4 second (user adjustable)
Fault Relay Internally Wired
Analog Output Sourced 4-20 ma, one for each flame relay
Load resistance < 500 Ohm
Digital Inputs Two self-powered inputs for up to four file selections
Communication RS-485 / Modbus
Electrical connections Quick Disconnect Connector
Cable 12 Conductor (color coded)
Tinned Copper Braid Shield, Black PVC Jacket CSA CMG (UL) PLTC-ER 300V 105C, Fire Resistant – FT4, UV Resistance
Diameter -0.463” Nominal
Weight – 0.17 lb/ft

HD Flame Detector Spec Sheet
Publication Number 404005-32

HD Flame Detector Manual
Publication Number 372001-17

HD Mobile App Manual
Publication Number 372001-21

HD Connect Manual (Windows Software)
Publication Number 372001-22

HD Flame Detector


  • High Definition – Maximum discrimination in difficult multi-burner environments.
  • Easy to use – app available for either smart phones or tablets
  • Installation friendly – lightweight housing and single flexible cable
  • Robust – 2 year warranty in normal operating conditions


  • Both Infrared (IR) and Ultraviolet (UV) sensors in every unit
  • High speed microprocessor based signal analysis
  • Bluetooth® and RS485 Modbus communications
  • Simple LED status indicators on HD Detector unit for Power, Flame Relay 1 & 2, Fault, Bluetooth®, and High Temperature
  • IP 66 housing and connections
  • RoHS compliant

Worldwide Agency Approvals