System Sensor 2151 Low Profile, Plug-In Photoelectric Smoke Detector

Model 2151 (photoelectric sensor) and model 2151T (photoelectric sensor with thermal) can be used with a variety of adapter bases in several wiring configurations and voltages. Other features include: low current draw, stable performance in high air velocities, built-in tamper resistant base design, remote LED option, removable cover and built-in test switch.

The 100 Series is designed to meet the performance criteria designated by UL. Its sensing chambers are sealed against back pressure air flow, dirt and insects. This chamber is protected by a fine mesh screen, which can be cleaned or replaced. Additional key features include a variety of mounting bases and a full line of accessories.

All 100 Series photoelectric smoke detectors contain a unique optical sensing chamber designed to sense smoke particles produced by a wide range of combustion sources. A custom integrated circuit incorporates signal processing to reduce false alarms.

Model 2151 photoelectric detector's unique optical sensing chamber is engineered to sense smoke by a wide range of combustion sources. Dual electronic thermistors add 135ºF fixed temperature thermal sensing on model 2151T.

• Sleek, low-profile design
• Compatible with 400 Series product
• Two LEDs blink in standby, providing 360º visibility
• Broad range of adapter bases available with built-in shorting spring
• Hand-held sensitivity reader available

Specifications

• Detection: Photoelectric
• Operating Voltage: (Mounting Base Dependent)
• Alarm Current: (Mounting Base Dependent)
• Temperature Range: 32º to 120ºF (0º to 49ºC)
• Humidity Range: 10% to 93% RH, noncondensing
• Dimensions: 2.0" (51mm) H x 4.1" (104mm) Dia. (unflanged base) or 6.1" (155mm) Dia. flanged base
• Weight: 3.1 oz. (88 g)

Ordering Information

Test magnet with 32. telescoping handle.

Part No.	Description
2151	Low-profile photoelectric detector. Must be mounted to one of the B100 Series or B400 Series bases listed in the Adapter Base Selection Guide.
2151T	Low-profile photoelectric detector with thermal. Must be mounted to one of the B100 Series or B400 Series bases listed in the Adapter Base
F110	Retrofit replacement flange for B400 Series flanged bases.
RA400Z	Remote annunciator for 2 or 4 wire systems, 3.32V. Fits standard single gang electrical box.
B401BH-2	Sounder base. Requires an external 24 VDC power supply. Mounts to 4. square electrical box (1.. minimum depth, 21.8. recommended).
SENS-RDR	Hand-held sensitivity reader.
SMK400	Surface mounting kit provides for entry of surface wiring conduit. For use with B401 or B401R mounting bases only.
EOLR-1	End of line relay for power supervision, 12/24 VDC systems.
M02-04-01	Test magnet.
M02-09-00
XR-2B	Detector removal tool. Allows installation and/or removal of 100 Series detector heads from base in high ceiling installations when used with XP-4.
XP-4	Extension pole for XR-2B. Comes in three 5 ft. sections.
C58-227-01	Replacement dust cover for 100 Series smoke detectors.
RMK400	Recessed mounting kit (B401 sold separately).