Siemens DT-135WP Weatherproof Heat Detector P/N:500-087260

The Siemens DT-135WP is a weatherproof commercial heat detector designed for conventional fire alarm systems operating in indoor or outdoor environments where smoke detectors may not be suitable. It combines 135°F (57.2°C) fixed-temperature detection with rate-compensation heat sensing to provide dependable fire detection while minimizing nuisance alarms caused by environmental conditions.

Built with a corrosion-resistant housing and self-restoring sensing element, the DT-135WP is suitable for harsh environments including industrial facilities, loading docks, parking structures, and exterior protected areas. This product is intended exclusively for commercial fire alarm installations.

Product Functions

• Fixed-temperature heat detection
• Rate-compensation heat sensing
• Initiates alarm on compatible conventional fire alarm systems
• Self-restoring thermal element
• Continuous thermal monitoring
• Weather-resistant operation
• Suitable for harsh environments

Electrical & System Information

The Siemens DT-135WP is a conventional normally open heat detector designed for use with compatible conventional fire alarm control panels. The detector uses a rate-compensation sensing mechanism that responds quickly to rapid temperature increases while also providing fixed-temperature operation at 135°F (57.2°C).

Because the sensing element automatically resets after cooling, no detector replacement is required following normal alarm operation. Multiple detectors may be installed on the same initiating device circuit, subject to system design and applicable fire alarm standards.

Features

• Commercial weatherproof heat detector
• 135°F (57.2°C) fixed-temperature operation
• Rate-compensation thermal sensing
• Self-restoring detector element
• Weatherproof construction
• Corrosion-resistant housing
• Shock-resistant design
• Conventional normally open contacts
• Suitable for indoor and outdoor use
• Compatible adapter plate available

Mounting & Design

The DT-135WP mounts to compatible Siemens detector bases and is designed for installation in weather-exposed locations. Its rugged enclosure resists moisture, corrosion, and mechanical shock, making it suitable for demanding commercial and industrial environments.

An optional ADAPT PLATE is available for retrofit or decorator-ring applications where required.

Protection & Applications

Suitable for:

• Parking Garages
• Loading Docks
• Mechanical Rooms
• Industrial Facilities
• Warehouses
• Manufacturing Plants
• Exterior Protected Areas
• Utility Buildings
• Commercial Properties

Compatibility

Compatible with:

• Siemens Conventional Fire Alarm Control Panels
• Compatible Conventional Fire Alarm Systems
• Siemens Conventional Flame Detectors
• Siemens Conventional Manual Pull Stations
• ADAPT PLATE Adapter Ring
• Compatible Conventional Initiating Device Circuits

Always verify compatibility with the installed fire alarm control panel, initiating device circuit, and project requirements before installation.

Technical Specifications

Manufacturer: Siemens

Model: DT-135WP

Product Type: Commercial Weatherproof Heat Detector

Detection Method: Rate Compensation / Fixed Temperature

Fixed Temperature Rating: 135°F (57.2°C)

Detector Type: Conventional

Contact Configuration: Normally Open

Reset Type: Self-Restoring

Maximum Coverage: Up to 2,500 sq. ft. (subject to applicable codes and engineering judgment)

Construction: Shock- and Corrosion-Resistant

Installation Location: Indoor or Outdoor

Mounting: Compatible Siemens Detector Base

Optional Accessory: ADAPT PLATE Decorator Ring

Application: Commercial Fire Alarm Systems

Listings: UL Listed; compatible with Siemens conventional fire alarm equipment. Verify project-specific approval requirements.

Applications

The Siemens DT-135WP is designed for commercial fire alarm systems requiring dependable heat detection in outdoor or harsh environments where smoke detectors may not perform reliably. Typical applications include parking structures, loading docks, mechanical equipment rooms, industrial plants, warehouses, utility buildings, manufacturing facilities, and other commercial locations requiring weatherproof thermal detection.

DT-135WP Datasheet