Spectrex 40/40UFL Ultra Fast UV/IR - Manual (Page 16)

SharpEye TM Ultra Fast UV/IR Flame Detector User Guide
4 Features and Benefits
1.3 Features and Benefits
 UV/IR Dual Sensor
 High Speed Response: 20msec. response to flash fire
 Built In Test (BIT): Automatic (see Built-In-Test (BIT) on page 16).
 Heated Window: Prevents effects of icing, snow, condensation.
 Electrical Interface:
 Dry contact relays
 Communication network RS-485
 0-20mA output
 HART Protocol: Communication protocol (see HART Protocol on page 6).
 Exde: Integral junction box for easy wiring.
 SIL-2: TÜV pending.
 Hazardous Area Certification: ATEX, IECEx, FM.
 Functionality Approval:
 FM approved per FM3260
 EN54-10 pending by VdS
1.4 Principles of Operation
This section describes the 40/40UFL principles of operation and includes:
 Detection Principles, page 4
 Heated Optics, page 5
 HART Protocol, page 6
 RS-485 Modbus, page 6
 Product Certification, page 6
1.4.1 Detection Principles
The Model 40/40UFL Flame Detector is an electronic device designed to
sense the occurrence of fire and flames and subsequently activate an alarm
or an extinguishing system directly or through a control circuit.
The UV/IR Radiation Flame Detector is a dual spectrum optical detector
sensitive to two separate ranges of the radiation spectrum, both of which
are present in fires. The detector monitors the protected volume, by
measuring the radiation intensity in it, within two frequency ranges of the
electromagnetic spectrum, namely the Ultra-Violet (UV) and the Infra-Red
(IR).