The Honeywell C7035A1064 is the low-temperature DIN configuration with BSP connections. Its 1–11 BSP.P1 front collar and ½–14 BSP-F rear conduit connection distinguish it from the NPSM versions. It has 1.83 m (6 ft) leads and an ambient rating of −40 to +121 °C.
Product Specification
- Operating ambient temperature: −40 to +121 °C.
- End-viewing UV sensor with a protective shield and field-replaceable sensing tube.
- 1–11 BSP.P1 internal collar for the sight pipe.
- Rear conduit connection: ½–14 BSP-F internal thread.
- Two color-coded 1.83 m (6 ft) leads, 18 AWG, NEC Class 1, silicone-rubber insulation rated for 150 °C.
- NEMA 4 and 4X housing, with rain-tight construction.
- Maximum sealed pressure: 5 psi (34.5 kPa) when correctly installed.
- DIN version identified in Honeywell Minipeeper product data.
BSP Mounting Configuration
The front sight-pipe collar uses 1–11 BSP.P1 internal threads, and the rear conduit connection uses ½–14 BSP-F internal threads. Both interfaces differ from the NPSM connections on the other listed C7035A models.
Control Compatibility and Operating Duty
For R7849A or R7849B UV amplifiers in compatible Honeywell 7800 systems. Honeywell also documents combinations with RA890G controls and R7249A, R7290A and R7749B amplifiers.
The burner must cycle off at least once every 24 hours. C7035A has no dynamic self-checking shutter; R7849B checks the amplifier circuit. The amplifier and relay module determine the flame-failure response time.
Replacement UV Sensing Tube
Honeywell lists 129464M for −18 to +121 °C and 129464N for −40 to +121 °C. Use the −40 °C-rated 129464N when maintaining this model’s low-temperature capability. These are replacement sensing tubes, separate from the complete C7035A detector assembly.
Compare Configurations
C7035A1031 has the same temperature range and 1.83 m lead length, but uses NPSM connections. View C7035A1031 specifications.
Compare all six C7035A models by temperature, lead configuration and mounting.

