Thermotech 194°F All-Weather Heat Detector 302-ET-194 with Hexagonal Grip Bushing, Vertical Mounting
Heat alarms for tough spaces.
A 194°F all-weather, vertical-mount heat detector that combines fixed temperature and rate-of-rise sensing. It covers areas where smoke detectors are unsuitable.

Some spaces are the wrong place for a smoke detector.
Kitchens, garages, boiler rooms and unconditioned spaces call for heat detection instead. The 302-ET-194 is built for those areas in commercial and industrial fire alarm systems.
Built for demanding fire detection
The 302-ET-194 pairs two detection methods with a sealed, self-restoring design.
Rate compensation
Rate compensation offsets thermal lag, so response stays immediate.

All-weather set point
The 302-ET-194 is the 194°F all-weather vertical mounting version of the 302-ET.
Fixed and rate-of-rise
A combination detector that senses both a set temperature and how fast the heat climbs.
Self-restoring
No manual reset is required after it operates.
Hermetically sealed
A sealed construction suited to an all-weather vertical mounting.
Everything you need to know.
| Brand | Thermotech |
| Model | 194°F |
| Product Model | 302-ET |
| Product Series | 302 |
| Product Type | Temperature Sensor |
| Heat Detector Type | Combination (Fixed Temperature and Rate-of-Rise) |
| Temperature Rating | 194°F |
| Mount Type | Vertical Mount |
| Base Diameter | 2" |
| Input Voltage | 120V AC |
| Country of Origin | US |
| Shipping Weight | 0.16 lb |
Thermotech 194°F All-Weather Heat Detector 302-ET-194 with Hexagonal Grip Bushing, Vert...
The Thermotech 302-ET-194 is an all-weather heat detector. It is intended for fire alarm contractors and facility maintenance teams. In short: Thermotech 194°F All-Weather Heat Detector with Hexagonal Grip Bushing, Vertical Mounting.
Detection type: Fixed Temperature, Rate of Rise. Rated input voltage: 120V AC.
Key Features
- Rate compensation offsets thermal lag
- Self-restoring – no manual reset required
- Explosion proof and weatherproof models available
- Weatherproof models available that do not require a special backbox
- Box mount and surface mount models available
Specifications
- Brand: Thermotech
- Model: 302-ET-194
- Product Model: 302-ET
- Product Type: Temperature Sensor
- Connectivity Technology: Wired
- Heat Detector Type: Fixed Temperature, Rate of Rise
- Color: Silver
- Form Factor: Ceiling Mount
- Input Voltage: 120V AC
- Input Voltage (V AC): 120
- Additional Information: All Weather Vertical Mounting
- Shipping weight: 0.16 lb
Typical Uses
- Heat detection where smoke detectors are unsuitable, such as kitchens, garages, boiler rooms and unconditioned spaces
- Commercial and industrial fire alarm systems
Fire alarm devices must be installed and tested by qualified personnel in line with NFPA 72, local codes and the manufacturer's installation instructions. Please confirm that the 302-ET-194 suits your fire alarm control panel, temperature rating and mounting before ordering.
Need help with compatibility?
Looking for a manufacturer part number, compatible replacement, or quantity order? Contact Raztechs for sourcing and quote support.

Thermotech 194°F, ready to order.
- Product Model: 302-ET
- Product Series: 302
- Product Type: Temperature Sensor
- Heat Detector Type: Combination (Fixed Temperature and Rate-of-Rise)
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