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A self-checking flame detector using a solid state UV sensor to detect ultraviolet radiation in flames for supervision of gas, oil or combination gas-oil burners.


  • Designed for use with 7800 series controls with the R7851C flame amp.
  • Oscillating shutter interrupts ultraviolet radiation reaching the UV sensor to provide the solid state UV sensor checking function.
  • Can be mounted horizontally, vertically or at any angle in between.
  • The detector requires faceplate alignment and has integral locating reference points to assure proper operation of the shutter mechanism.
  • Models available with threaded conduit fitting and color-coded leadwires allow rapid electrical installation.
  • C7961E1022 or E1030 5 pin Brad Harrison type (formally 41307N) mating connector not supplied nor available through Honeywell.
  • Incorporates UV sensor tube checking feature; used with R7851C1008 Dynamic Self-check Amplifiers.
  • Protective heat block built into mounting flange.
  • -40 F (-40 C) rated ultraviolet sensing cell is supplied.
  • C7961E meets NEMA 4 standards with viewing window rated to 20 psi.
  • C7961F has an explosion-proof housing for use in hazardous atmospheres with a viewing window rated to 100 psi.

Product Specifications

Gas, Oil or other fuels
Dimensions (in.)
3 3/4 in. diameter (5 1/4 in. diameter including mounting flange) x 7 7/32 in. long
Dimensions (mm)
95 mm diameter (133 mm diameter including mounting flange) x 183 mm long
Quartz Viewing Window rated for 20 psi (138 kPa)
Used With
R7851C Dynamic Self-Check Amplifier
Weight (lb)
2.6 lb
Weight (kg)
1.2 kg
Detects ultraviolet radiation generated by combustion of gas, oil, or other fuels
1 in. NPT
Electrical Ratings
120 Vac (-15% +10%)
50 Hz; 60 Hz
Approvals, Underwriters Laboratories Inc.
Component Recognized: File No. MP268
Approvals, Canadian Standards Association
Certified: Pending
Electrical Connections
5 pin Brad Harrison Type Connector
Approvals, Swiss RE
Approvals, Factory Mutual
Ambient Temperature Range (F)
-40 F to +175 F
Ambient Temperature Range (C)
-40 C to +80 C
NEMA Rating
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