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Honeywell COSMO-4W System Sensor 4-Wire i4 Smoke and Carbon Monoxide Detector

Honeywell COSMO-4W System Sensor 4-Wire i4 Smoke & Carbon Monoxide Detector
Honeywell COSMO-4W System Sensor 4-Wire i4 Smoke & Carbon Monoxide Detector
Item# COSMO-4W
List Price: $122.38
Your Price: $81.59

Honeywell COSMO-4W Product Description:


The Honeywell System Sensor COSMO-4W is a i4-Series combination, four-wire, photoelectric carbon monoxide (CO) and smoke detector. The COSMO-4W features the best-in-class dual-combination CO and smoke detection technology in a single, system-connected device.

The COSMO-4W i4-Series combines CO and smoke detection into one device, requiring less wiring and fewer back boxes than two separate devices. The i4-Series is compatible with i3 (2WTA-B or 4WTA-B), so an attractive CO monitoring solution can easily be retrofitted into existing i3 installations. The i4-Series CO cell can be easily replaced at end-of-life, resulting in a much lower life cost than having to replace the entire detector.

The COSMO-4W i4-Series Combination CO/Smoke detector requires less wiring than two separate CO and smoke devices. DIYer's can pre-wire its plug-in base, while its large wire-entry port and in-line terminals provide ample room for neatly routing wiring. The base accommodates several back box options and also direct mounts using drywall anchors. The i4 head plugs into the base with a simple Stop-Drop 'N Lock™ action. When the detector's CO cell reaches end-of-life, it can be easily replaced in the field without a tool.

With the help of the module, the COSMO-2W i4-Series transmits distinct CO and smoke signals, allowing appropriate response from the central monitoring station. Intelligent features, such as drift compensation and smoothing algorithms, reduce nuisance alarms.The COSMO-4W LED's enable instant inspection of detector status signaling normal/standby condition, alarm condition, maintenance/trouble condition or functional test mode. 2-wire devices allow loop testing via the EZ Walk feature where wiring can easily be verified by checking the LED status at each detector.

Smoke sensitivity can be easily measured using the wireless SENS-RDR device. CO cell functionality can also be quickly validated in the field with canned CO per NFPA 720: 2009 requirements using the detector's RealTest functionality.

Product Features:
  • Single device for CO and smoke detection that uses less wiring and fewer junction boxes
  • Compatible with a wide range of control panels with the use of the required i4 Interface Module
  • Sends distinct smoke and CO signals to the panel
  • Sounds Temporal 3 for smoke and Temporal 4 for CO
  • Built-in 85dB sounder
  • LEDs display both CO and smoke status
  • External IR LED provides extended range sensitivity testing
  • Versatile mounting allows for wall or ceiling placement
  • Easily replaceable electrochemical CO cell with 6-year end-of-life timer that signals the panel and chirps to alert the homeowner
  • RealTest® enables functional test using canned CO
  • Drift compensation and smoothing algorithms provide false alarm immunity
  • Compatible with SENS-RDR sensitivity tester
  • Full agency compliance with UL 268 and UL 2075

Honeywell COSMO-4W Product Specifications:


  • Dimensions: Diameter: 5.5"; Depth: 2.5" (includes base)
  • Operating Temperature Range: 32°F to 122°F (0°C to 50°C)
  • Storage Temperature Range: -10 70° C (14 158° F)
  • Operating Relative Humidity: 20-95% RH
  • Operating Voltage: Nominal: 12/24V non-polarized | Minimum: 8.5V | Maximum: 35V
  • Maximum Standby Current: 50 A
  • Maximum Alarm Current: 2-Wire 50mA; 4-Wire 40mA
  • Audible Signal: 85 dBA
  • Maximum Reverse Polarity Current: 20 mA
  • Maximum Start-up Current: 200uA
  • Maximum Start-up Capacitance: 10 µF
  • Weight: 9.2 oz. (261 g)
  • Sensitivity: 2.5%/ft nominal
  • Input Terminals: 14 to 22 AWG
  • Mounting: 3½-inch octagonal back box | 4-inch octagonal back box | Single-gang back box | 4-inch square back box with a plaster ring | Direct mount to ceiling

Q & A's : System Sensor COSMO-4W 4-Wire i4 Smoke/CO Detector


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