System Sensor 4WITAR-B


4 Wire Photo Isolated Therm

Availability: Please Call for Availability

Condition: New
Brand: System Sensor
Status: Active
SKU: 32216
Manufacturer Part #: 4WITAR-B


The 4WITAR-B is a 4-wire, photoelectric i3 smoke detector with an isolated thermal sensor, built-in sounder, and Form C relay. 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.

Additional information

Weight 0.2 lbs



Production Status



  • 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


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System Sensor - Data Sheet