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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.)
8 in. diameter x 12 in. long
Dimensions (mm)
203 mm diameter x 305 mm long
Quartz Viewing Window rated for 100 psi
Used With
R7851C Dynamic Self-Check Amplifier
Weight (lb)
14.5 lb
Weight (kg)
6.6 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
Electrical Connections
NEC Class 1 color-coded
Approvals, Swiss RE
Approvals, Factory Mutual
Approved: Report No. 14740.01
Ambient Temperature Range (F)
-40 F to +175 F
Ambient Temperature Range (C)
-40 C to +80 C
NEMA Rating
Explosion Proof
Lead Length (in.)
96 in.
Lead Length (mm)
2438 mm
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