Siemens PE-11T

Photoelectric Smoke Detector with 135°F Thermal Sensor

Condition: New
Brand: Siemens
Status: Obsolete
SKU: 33475
Manufacturer Part #: PE-11T
Replacement: OH121


The PE-11 is a two-wire, plug-in type photoelectric smoke detector which is compatible with Cerberus Pyrotronics PXL, SXL, and System 3 conventional systems and conventional loops of MXL Series, IXL and XL3 analog-addressable systems. The PE-11 contains an infra-red light emitting diode (LED) and a light sensing photodiode arranged so that under normal conditions, light from the LED does not reach the photodiode. When smoke enters the photo chamber, light emitted from the IR LED is scattered by the smoke particles and is received by the photodiode. The electrical signal produced by the photodiode is compared to a factory set alarm threshold, and if sufficient to indicate an alarm, latches the detector alarm. The PE-11 is reset at the control panel. An optional 135°F (57°C) Thermal Sensor is available with the model PE-11T. When the optional thermal sensor is utilized, an alarm condition will be initiated when the temperature in the proximity or the sensor reaches 135°F. At this point the detector locks into alarm.

Additional information

Weight 0.2 lbs

Siemens Industry, Inc.




Unit of Measurement

EA (Each)

Detection Method

Fixed Temperature, Photoelectric

Thermal Rating


Production Status



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PE-11 and PE-11T Photoelectric Smoke Detector


Siemens - Data Sheet