Thermotech 302-AW-194 Heat Detector

The Thermotech 302-AW-194 194°F All-Weather Heat Detector provides reliable temperature detection for fire alarm systems in demanding environments. Its all-weather construction supports indoor and outdoor applications where moisture or dust may affect conventional detection equipment. In addition, the detector uses rate-compensation technology to provide a fast and dependable response to rising temperatures.

194°F Heat Detection

The Thermotech 302-AW-194 has a nominal temperature rating of 194°F (90°C). The detector responds when ambient temperature reaches its predetermined operating point.

Its rate-compensation design helps compensate for thermal lag. Therefore, the detector can respond effectively even when temperatures rise rapidly.

The 302 Series operates within a controlled range close to its rated set point. As a result, the detector provides consistent thermal detection across different rates of temperature rise.

All-Weather Construction

This model features a hermetically sealed design for moisture- and dust-resistant installations. Therefore, it works well in locations where environmental conditions require additional protection.

The rugged construction also provides resistance to shock, corrosion, and tampering. Moreover, the all-weather configuration supports both indoor and outdoor installations when technicians follow the required wiring and sealing procedures.

Self-Restoring Operation

The detector uses a normally open contact configuration. When temperature reaches the alarm threshold, the detector changes state and activates the connected alarm circuit.

After the surrounding temperature drops below the operating point, the detector automatically returns to its normal condition. Therefore, technicians do not need to perform a manual reset at the detector after a temperature event.

Key Features

• 194°F (90°C) temperature rating
• All-weather heat detector
• Vertical mounting configuration
• Rate-compensation detection technology
• Normally open operation
• Self-restoring design
• Hermetically sealed construction
• Moisture- and dust-resistant design
• Shock-resistant construction
• Corrosion-resistant construction
• Tamper-resistant design
• Suitable for indoor and outdoor applications
• 50 ft × 50 ft smooth-ceiling UL spacing rating
• UL Listed
• FM Approved
• Designed for professional fire alarm systems

Electrical Ratings

The Thermotech 302-AW-194 provides dry-contact operation for compatible fire alarm circuits. The 302 Series supports several electrical ratings depending on the connected circuit.

Published ratings include 5A from 6 to 125 VAC, 1A from 6 to 25 VDC, and 0.5A at 125 VDC. Therefore, installers should verify the connected circuit requirements before installation.

Dimensions and Mounting

The detector has an overall length of approximately 4-1/8 inches and a base diameter of approximately 2 inches. Its vertical configuration supports surface installation in compatible locations.

The all-weather model does not require a special back box when installers properly splice its leads to suitable wiring and protect the connections from moisture. As a result, the detector provides flexible installation options for challenging environments.

Typical Applications

This heat detector can support many commercial and industrial fire detection applications. For example, technicians may use it in warehouses, mechanical areas, industrial facilities, utility spaces, and other environments where heat detection offers a suitable alternative to smoke detection.

Its all-weather construction also makes it useful for areas exposed to moisture, dust, or changing environmental conditions.

Installation and Compatibility

Always verify the fire alarm control circuit, temperature requirements, mounting orientation, spacing, and environmental conditions before installation. Also, follow the approved fire alarm system design and manufacturer instructions.

Qualified fire alarm professionals should install and test the detector. Furthermore, installers should follow applicable fire alarm codes and local requirements.

Overall, this Thermotech all-weather heat detector provides dependable thermal detection for demanding fire alarm applications. Its 194°F rating, rate-compensation technology, self-restoring operation, and hermetically sealed construction make it a practical choice for compatible indoor and outdoor fire detection systems.

302-AW-194 Datasheet