System Sensor’s ił™ Series photoelectric and photoelectric/
thermal smoke detectors represent a significant advancement
in conventional detection, incorporating three key features:
installation ease, intelligence, and instant inspection.
Installation ease. The ił Series redefines installation ease with
its plug-in design. This allows an installer to pre-wire the bases
included with the heads. The large wire-entry port and in-line
terminals provide ample room for neatly routing the wiring
inside the base. The base accommodates a variety of backbox
mounting methods, as well as direct mounting with drywall
anchors. To complete the installation, ił Series heads plug into
the base with a simple Stop-Drop ’N Lock™ action.
Intelligence. ił Series detectors offer a number of intelligent
features to simplify testing and maintenance. Drift compensation and smoothing algorithms, to minimize nuisance alarms,
are standard in the ił Series. When connected to the 2W-MOD
loop test/maintenance module, an SFP-2402/-2404 panel,
SFP-5UD/10UD, or RP-2001/2002 two-wire ił detectors are
capable of generating a remote maintenance signal when they
need cleaning. This signal is indicated by LEDs located at the
module and at the panel. To read the sensitivity of ił detectors,
the SENS-RDR is a wireless device that displays sensitivity in
terms of percent-per-foot obscuration.
Instant inspection. The ił Series provides wide-angle red and
green LED indicators for instant inspection of detector condition. The LEDs indicate: normal standby, out-of-sensitivity,
alarm, or freeze trouble conditions. The “EZ Walk” loop test
feature is available on two-wire ił Series detectors when con-
nected to the 2W-MOD loop test/maintenance module. The
“EZ Walk” feature verifies the initiating loop wiring by providing
LED status indication at each detector.
- Plug-in detector line — mounting base included.
- Large wire-entry port.
- In-line terminals with SEMS screws.
- Mounts to octagonal and single-gang backboxes, 4" (101.6mm) square backboxes, or directly to ceiling.
- Stop-Drop ’N Lock attachment to base.
- Removable detector cover and chamber for easy cleaning.
- Built-in remote maintenance signaling.
- Drift compensation and smoothing algorithms.
- Simplified sensitivity measurement.
- Wide-angle, dual-color LED indication.
- Loop testing via “EZ Walk” feature.
- Built-in test switch.
This ability to reject certain nuisance alarm triggers, such as theater
smoke, supports the use of the detector in applications where mod-
erate to heavy nuisance conditions exist that might cause single
sensing detectors to trigger a false alarm.
The PTIR detector meets both UL 268 7th edition and UL 521 listing
requirements and can indicate distinct smoke and heat alarms. This
dual nature supports a local alarm setting for photoelectric detection
and a general evacuation setting based on thermal detection. This
can minimize work interruptions in multi-level buildings. Canadian
models meet listing requirements of CAN/ULC S529 and CAN/ULC
- Multi-criteria detection
- UL 268 7th Edition and UL 521 Listed; Canadian models CAN/ULC S529 and CAN/ULC S530
- New modern profile
- Analog communications
- Low standby current
- Rotary address switches
- Dual LEDs for 360° visibility
- Expanded color options
- FlashScan® protocol support on all models; FlashScan and CLIP protocol support on -IV models
Smoke detector shall be a System Sensor ił Series model
number ________, Listed to Underwriters Laboratories UL
268 Fire Protection Signaling Systems. The detector shall be a
photoelectric type (models 2W-B, 4W-B) or a combination photoelectric/thermal (models 2WT-B, 4WT-B) with thermal sensor
rated at 135°F (57.2°C). The detector shall include a mounting
base for mounting to 3.5" (88.9 mm) and 4" (101.6 mm) octagonal, single-gang, and 4" (101.6 mm) square backboxes with a
plaster ring, or directly mount to the ceiling using drywall
anchors. Wiring connections shall be made by means of
SEMS screws. The detector shall allow pre-wiring of the base
and the head shall be a plug-in type. The detector shall have a
nominal sensitivity of 2.5%/foot (0.762%/meter) as measured
in the UL smoke box. The detector shall be capable of automatically adjusting its sensitivity by means of drift compensation and smoothing algorithms. The detector shall provide
dual-color LED indication which blinks to indicate power-up,
normal standby, out-of-sensitivity, alarm, and freeze trouble
(models 2WT-B, 4WT-B) conditions. When used in conjunction
with the 2W-MOD module, two-wire models shall include a
maintenance signal to indicate the need for maintenance at
the alarm control panel, and shall provide a loop testing capability to verify the circuit without testing each detector individually.
Agency Listings and Approvals
In some cases, certain modules may not be listed by certain
approval agencies, or listing may be in process. Consult fac-
tory for latest listing status.
- UL/ULC: S1111
- FM Approved
- CSFM: 7272-0028:0510
- MEA: 290-01-E
- Maryland State Fire Marshal: Permit # 2093