System Sensor 4WTA-B


Photoelectric i3 Series Smoke Detector, 4-Wire, With Thermal Sensor and Built-In Sounder, White

Availability: Estimated 3 - 5 Business Days

  • Factory New
Brand: System Sensor Part #: M01B-2219 Categories: , Manufacturer Part #: 4WTA-BSecondary Part #: 63-1035 Tag:


System Sensor i3 sounder and relay smoke detectors apply the guiding principles of installation ease, intelligence, and instant inspection in a series of specialty conventional devices.

To reduce the likelihood of nuisance alarms, all i3 detectors are equipped with both drift compensation and smoothing algorithms. These capabilities minimize both short- and long-term causes of nuisance alarms, such as RF interference and dust accumulation. When connected to the 2W-MOD2 loop test/ maintenance module or an i3 Ready™ panel, 2-wire i3 detectors can generate a remote maintenance signal when in a maintenance or freeze trouble condition. To measure the sensitivity of any i3 detector, the SENS-RDR displays the reading, in terms of percent-per-foot obscuration, within seconds.

i3 has red and green LEDs to simplify local status indication during power-up, standby, alarm, maintenance, and freeze trouble conditions. When in alarm, i3 sounder models generate an 85 dB temporal tone. If connected to the RRS-MOD reversing relay/synchronization module, all i3 sounders on the loop will activate when one detector is in alarm. The RRS-MOD also synchronizes i3 sounder output to ensure a clear audible signal.


Weight 0.40 lbs
Dimensions 2.00 × 5.30 × 5.30 in
Detection Method

Fixed Temperature, Photoelectric

Thermal Rating






System Sensor

Production Status


Smoke Detectors with Sounder and Relay Option


System Sensor - Data Sheet

Photoelectric Smoke Detector


System Sensor - Installation and Maintenance