Product Specification Sheet APS1088

Rev. 12/2017

WSD505 Wireless Smoke Detector (AEC200 Series)

  • Fully supervised wireless 900MHz frequency EchoStream® transmitter
  • Low profile design
  • Maintenance warning
  • Operates on two (2) field-replaceable, 3V lithium batteries (model BA505)
  • Low Battery signal at 2.7V (checks every 130 minutes)
  • 60 Minute check-in time frequency
  • Automatic drift compensation
WSD505 Wireless Smoke Detector (AEC200 Series)
The Alpha Communications® WSD505 Wireless Smoke Detector is for use with the AlphaEcall™ 200 series (AlphaECall200) Wireless Emergency Call System.

The WSD505 is built upon photoelectric ESL technology, that continually monitors its own sensitivity and operational status. The detector provides drift compensation and visual display of over- or under sensitivity so that corrective action can be taken to reduce false alarms. Wireless frequency hopping technology maximizes range and reliability. The WSD505 is powered by two (2) included 3V Lithium batteries, and battery life is estimated at up to five (5) years, reducing the inconvenience and cost of replacing batteries. The WSD505 Wireless Smoke Detector features a low profile design and blends in with any decor.

Diameter: 5.30" (135mm)
Depth: 2.63" (67mm)

Weight: 9.9 oz. (with batteries)
Power: Two (3) 3V Lithium batteries (included) low battery signal at 2.7V
Battery Life: 3-5 years (typical, non-condensing)
Environment: 0°C to 50°C (32°F to 120°F); up to 95% relative humidity
Alarm Sounder: 85 dB @ 3m - temporal output
Required Components
AlphaEcall™ 200 series Wireless Emergency Call System
Architects' And Engineers' Specifications
The wireless Smoke Detector(s) shall be Alpha Communications® WSD505 or approved equal. It shall use the 900 MHz frequency for signal transmission, and shall monitor its own sensitivity and operational status. No physical wiring connections shall be required to transmit an alarm call. Two (2) 3V lithium batteries shall be included. The transmitter shall be no larger than 5.50" diameter x 2.63" deep.

Alpha Communications® has designed the AlphaEcall™ 200 (AlphaECall200) Series to work as a fully integrated system. Its AEC200DM Master Station has been carefully designed and matched to work with AlphaEcall™ AEC200 wireless and wired peripherals. Alpha Communications® will not warrant or support components of AlphaEcall™ AEC200 that are purchased separately unless the components are add-ons to previously sold systems. Alpha Communications® will also not warrant or support a system that is a mix of Alpha Communications® and Non-Alpha Communications® parts, unless prior written permission has been obtained. In order to track our systems and to inform facilities of software upgrades, full site information (site name, address and phone number) will be required when ordering. Site information and AEC200DM warranty number will also be required when requesting technical support.
Alpha Communications
42 Central Drive • Farmingdale • NY • 11735-1202 • Phone: (631) 777-5500 • Fax: (631) 777-5599
TOLL-FREE: (800) 666-4800 • Web: • Email:
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Due to continuous product improvement, all colors, sizes, materials, finishes and specifications are subject to change without notice.