Fireye UV1AL-3 UV1AL-6 United States Ultraviolet Flame Detector/UV Flame Detector Spot

I. Primary Application

Detects ultraviolet (UV) signals from flames produced by **gaseous fuels (natural gas, propane) and light oils (No. 2 diesel)**.

Suitable for flame safety monitoring applications in industrial boilers, heating furnaces, burners, incinerators, and similar equipment.

Not suitable for heavy oils (> No. 2 oil): UV signals are easily obscured by unburned fuel vapors or atomizing media; use of an infrared probe is recommended instead.

II. Model Variations (Cable Length Only)

UV1AL‑3: 3 ft (36 in ≈ 915 mm) shielded cable.

UV1AL‑6: 6 ft (72 in ≈ 1830 mm) shielded cable.

Cable Specifications: TC-ER (Tray Cable / Exposed Run rated), compliant with UL 1569 impact and crush resistance standards.

III. Key Technical Parameters

Detection Principle: Ultraviolet (UV) photocell; non-self-checking type (requires an external amplifier). Mounting Connection: 1/2” NPT Male Thread; standard furnace wall mounting.

Operating Temperature: ≤93°C (200°F); for temperatures exceeding this limit, a cooling air supply or thermal barrier fitting (Fireye 35‑69) is required.

Pressure Rating: 1 PSI (≈0.07 bar); for positive-pressure furnaces up to 50 PSI, a quartz viewing window and sealing assembly are required.

Detection Distance: ≤1 m (39 in); can be extended to 2 m with the addition of a quartz lens.

Humidity: ≤85% RH (non-condensing).

Enclosure: Metal construction; industrial-grade protective design.

IV. System Requirements (Mandatory)

Requires connection to an external Fireye EUV Series Amplifier, or an M-Series / BurnerLogix / Nexus Combustion Controller.

Cannot be used as a standalone device; the probe is solely responsible for capturing UV signals, while logic processing and alarm functions are handled by the controller.

V. Installation Guidelines

Aim the probe at the base or center of the flame; ensure an unobstructed line of sight (the pilot flame and/or main flame must be within the field of view).

Connect to the furnace wall using a 1/2” × 1.5” pipe nipple; an optional swivel mount (60‑302) is available for angle adjustment.

Route cables to avoid exposure to high temperatures or abrasion; ensure watertight sealing at all connection points.

VI. Model Selection Guide

UV1AL‑3: Short cable (3 ft); suitable for standard, close-range installations.

UV1AL‑6: Long cable (6 ft); suitable for long-distance routing or through-wall/bulkhead wiring.

Series Alternative: UV90L (Self-checking type; features an integrated terminal block, eliminating the need for field wiring).