Thermotech 302-ET-135
Thermotech 302-ET-135
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The Thermotech 302-ET-135 is a rate-compensation heat detector rated at 135 degrees F, built around an aluminum outer tube that expands faster than its inner sensing struts as temperature rises. On a rapid temperature rise the outer shell's faster expansion closes the contacts early to compensate for thermal lag, while on a slow rise the contacts close once ambient reaches the rated temperature; the detector self-restores once temperatures drop back down. Its weatherproof, hermetically sealed construction and hexagonal grip bushing make it suitable for outdoor and exposed mounting.
Key Features
- Rate-compensation sensing element for both slow and fast temperature rises
- Self-restoring, hermetically sealed, corrosion- and shock-resistant, tamper-resistant design
- All-weather construction with hexagonal grip bushing; mounts horizontally or vertically
Technical Specifications
- Fixed temperature rating: 135 degrees F; RTI classification: Quick
- Contact ratings: 5A at 6-125VAC, 1A at 6-25VDC, 0.5A at 125VDC
- UL-listed spacing: 40 ft x 40 ft (horizontal mount); FM-listed spacing: 20 ft x 20 ft
- Maximum ceiling temperature: 100 degrees F; minimum ambient: -40 degrees F
Certifications
- UL Listed and FM Approved
- California State Fire Marshal Listing No. 7270-0021:001
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