Honeywell C7035A1023 UV sensor

SKU: C7035A1023/U, 534.211.043

Price on request

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Honeywell C7035A1023/U photoconductive cells are used to determine the presence of ultraviolet radiation emitted by a flame. Flame detectors are used with Honeywell flame monitoring systems to detect the presence of flames in gas, oil and combined burners.


• The Resideo C7035A1023/B photo cells are used together with the R7249A, R7290A, R7749B and R7849A, B amplifiers and the corresponding Honeywell control devices.

• The flame detector C7035A1023 has a built-in cuff with an internal thread of 1-11-1/2 NPSM for installation on a one-inch inspection tube.

• The housing of the Honeywell C7035 A 1023 flame detector meets the requirements of Underwriters Laboratories Inc. for protection against moisture penetration and the NEMA standard for cabinets of type 4 and 4X.

• When properly installed, the C7035A 1023 can be used at pressures up to 5 psi.

• The UV reading tube C7035A 1023/U is replaced in the field.

• Two flame detectors C7035 A 1023/B can be connected in parallel in cases where flame reading is difficult.


Flame detection: End of flame.

Ambient temperature range: -18°C to +121°C or -40°C to +121°C, depending on the model.

Maximum allowable pressure: 5 psi (34.5 kPa).

Installation: Cuff with 1-11-1/2 NPSM internal thread for installation on a one-inch inspection tube. (DIN-certified model C7035A1064 has thread 1-11 BSP.P1)

Electrical connections: Two wires 6 ft [1.83 m], color-coded, NEC Class 1, rated up to 204°C. One model comes with 12 ft [3.66m] long wires). There is a 1/2-14 NPSM thread at the back of the detector for connecting the wire.

Spare parts

1. Flange seal 129808

2. UV reading tube 139464M 18° – + 121°C

3. UV reading tube 139464N 18° – + 121°C

Basic requirements for the installation of an ultraviolet flame detector

The flame creates ultraviolet radiation that is invisible to the human eye, but can be detected by a special tube reading ultraviolet radiation. There are two requirements that must be met when installing an ultraviolet sensor:

• The detector must be in the direct line of sight of the flame.

• The detector must not be exposed to other ultraviolet radiation, primarily from ignition sparks.

• The detector must necessarily “see” the flame and therefore it must be located as close to the flame as physical conditions and temperature restrictions allow.


Underwriters Laboratories Inc.: MP268 certificate.

Canadian Standards Association Certificate: Master Report LR 95329-1.

Factory Mutual certificate.

Certificate of Industrial Risk Insurers.