System Sensor 4WTAR-B Smoke Detectors with Sounder and Relay Option

  • Sale
  • $88.84
  • Regular price $139.57


Installation ease. Throughout the i3 series, installation is simple with its installer-friendly base and plug-in design. The base accommodates a broad range of back box and direct mounting options and provides ample space for pre-wiring the device. To complete the installation, the i3 detector plugs into its base with a simple Stop-Drop ’N Lock action.

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.

Instant inspection. 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.

Should the application call for differentiating between a local and a general alarm, the i3 line offers an isolated thermal model, which initiates a local alarm when smoke is detected, and a general alarm when the thermal sensor is activated.


  • 85 dB sounder
  • Form C relay
  • Isolated thermal sensor
  • Plug-in design (base included)
  • In-line terminals
  • Flexible mounting options
  • Stop-Drop ’N Lock™ attachment to the base
  • Removable cover and chamber
  • Remote maintenance signaling
  • Drift compensation and smoothing algorithms
  • Simplified sensitivity measurement
  • Dual-color LEDs


Operating Voltage: 12/24 VDC (peak).
Standby Current: 4-wire: 50 ìA maximum average
Maximum Alarm Current: 4-wire: 35 mA
Alarm Contact Ratings 4-wire: 0.5 A @ 30 V AC/DC
Operating Temperature Range: 32°F – 100°F (0°C – 37.8°C)
Operating Humidity Range: 0% to 95% RH non-condensing
Thermal Sensor: 135°F (57.2°C) fixed
Freeze Trouble: 41°F (5°C)
Sensitivity: 2.5% /ft. nominal
Input Terminals: 14 – 22 AWG
Dimensions (including base): 5.3 inches (127 mm) diameter, 2.0 inches (51 mm) height
Weight: 6.3 oz. (178 grams)
Mounting: 3.5-inch (8.8 cm) octagonal backbox 4-inch (10.16 cm) octagonal backbox. Single-gang back box 4-inch (10.16 cm) square backbox with plaster ring. Direct mount to ceiling.)