
Product Overview
Features & Benefits
Lead SuLfide SenSor
Sensitive to infrared and visible light
radiation prevalent in fuel oil, coal and
lignite flames.
dynamic fLame SenSing circuitry
Senses only a dynamic flame signal,
discriminates flame from hot refractory
and other background conditions.
compact, durabLe aSSembLy
e printed circuit board and sensor
are potted within a cast steel housing
providing a maintenance free product.
SimpLified SyStem maintenance
Quick disconnect, electrical and
mechanical connections are used for easy
replacement.
fiber opticS
Optional fixtures are available for fiber
optic applications.
factory mutuaL approvaL
Factory Mutual (FM) approval means safe
operation and lower insurance rates.
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Forney’s Intelligent Dynamic Detector (IDD) II Series is designed to
accurately detect and discriminate the luminous flames produced by burning oil,
coal, and lignite fuels.
e IDD-II (Filtered) flame detector is typically used for sensing heavy fuel
oil and coal flames. e IDD-IIU (Unfiltered) flame detector is typically used for
sensing light fuel oil flames. e IDD-IIL (Lignite) flame detector is specifically
designed to sense low flame frequency produced by lignite and high ash coal
flames.
e IDD-II Series is used in conjunction with Forney’s supporting amplifiers
IDD-9000, DR-6101E, RM-IDD and IDD-IIIA.
e IDD-II’s solid state circuitry amplifies a continuously changing voltage
signal transmitted from the lead sulfide sensor when flame is sensed. e signal is
then sent to the amplifier by way of a four conductor cable. e amplifier processes
the signal and provides outputs to the burner management system.
For trouble-free operation, the detector electronics are potted within the cast
steel housing. In addition, the amplifier also initiates a periodic, electronic self-
check of the sensor and printed circuit board to verify proper operation of the
detector assembly.
IDD-II Series Flame Detector
Forney’s IDD-II Series Flame Detector
meets the operational flexibility
requirements of utilities through multiple
flame detecting and discriminating
capabilities.
A UTC Fire & Security Company
Forney Corporation • 3405 Wiley Post Road • Carrollton, TX 75006 • 800-356-7740 • Fax 972-458-6650 • www.forneycorp.com
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