DSC WS4936 Wireless Photoelectric Smoke Detector

The Tyco DSC WS4936 is a 433 MHz wireless photoelectric smoke detector with integrated 135 F fixed-temperature and rate-of-rise heat detection. It includes an 85 dBA internal alarm sounder, automatic drift compensation, local test and hush controls, and 3 AAA batteries with approximately 3 years of typical battery life. The detector is compatible with DSC 433 MHz wireless receivers and control panels.

Tyco DSC WS4936 Wireless Smoke and Heat Detector

The Tyco DSC WS4936 is a wireless life-safety detector that combines photoelectric smoke sensing, fixed-temperature heat detection, and rate-of-rise heat detection in a single low-profile device. Designed for DSC 433 MHz wireless security systems, the detector transmits smoke alarms, heat alarms, tamper conditions, low-battery conditions, and detector trouble information to a compatible control panel or wireless receiver.

The WS4936 provides a 135 F (57 C) fixed-temperature heat alarm and rate-of-rise detection that responds when temperature increases rapidly over a short period. Its photoelectric smoke sensor has a published alarm sensitivity range of 1.26% to 2.39% obscuration per foot. Automatic drift compensation helps maintain smoke-sensing performance as environmental conditions change, while high- and low-sensitivity reporting alerts the control system when the detector requires attention.

The detector incorporates an 85 dBA minimum ANSI Temporal 3 alarm sounder, a local test button, and an 8-minute automatically resettable hush function. Three AAA batteries power the detector and provide approximately 3 years of expected service under typical operating conditions. Low-battery monitoring provides approximately 14 days of remaining battery indication, and the WS4936 transmits supervisory messages to the control panel at 64-minute intervals.

The DSC WS4936 measures 5 inches (125 mm) in diameter by 2.5 inches (63 mm) high and weighs approximately 8.75 oz (243 g) with batteries installed. It operates from 40 F to 100 F (4.4 C to 37.8 C), with heat detection specified from 32 F to 100 F (0 C to 37.8 C), and supports 15% to 90% non-condensing relative humidity. The North American WS4936 is listed to UL 268 and ULC-S531 and is designed for compatible DSC residential and small-business fire protection systems.