Precision Testing for High-Stakes Environments
Explore our lineup of HST Series Heat Detector Test Kits—engineered for accuracy, built for the field, and trusted across aerospace, energy, and industrial safety.
Trusted Tools. Proven Process.
Uniquely engineered for probe-style heat detectors, the HST Series is trusted by fire safety professionals worldwide. With models ranging from 140°F to 950°F and multiple chamber sizes, these testers deliver accurate, repeatable results in the field—without the cost and delay of lab-based testing.
Built for demanding environments.
From 140°F to 950°F / 60°C to 510°C
Lightweight, pole-compatible, battery-powered
With a combination of domestic and imported components
Explore the HST Test Kit
Hover over the image to explore the key components of the HST Heat Detector Tester. Click to learn more about how the system delivers reliable performance in the field.
Long-lasting 3000mAh battery for extended field performance.
More Details Find the Right Tester for Your Detector
Search by Detector, Model, or Temperature
Browse by Detector Compatibility or Test Range
Organized by chamber size, detector model, and application, the HST Series Testers cover a wide range of heat detectors used in aerospace, oil & gas, manufacturing, military, and more.
*Each entry is formatted as: Temperature Range | HST Model Number | Compatible Detector Brand/Model
5/8" Chamber
- 140-225°F | HST-A-ALO/-C | Fenwal DAF®
- 160-275°F | HST-A-MEL/-C | Fenwal DAF®
- 190-325°F | HST-A-MEH/-C | Fenwal DAF®
- 225-360°F | HST-A-ALM/-C | Fenwal DAF®
- 275-450°F | HST-A-AME/-C | Fenwal DAF®
- 325-500°F | HST-A-AMH/-C | Fenwal DAF®
- 450-725°F | HST-A-AHI/-C | Fenwal DAF®
- 140/-950°F | HST-A-17343-124/113 | Fenwal® 17343-124/-113
- 300-475°F | HST-A-17343-62-2 | Fenwal® 17343-62-300/-450
- 920-980°F | HST-A-17343-950 | Fenwal® 17343-950
7/32" Chamber
16mm/16.5mm Chamber
17mm Chamber
18mm Chamber
20mm Chamber
Learn More About the HST Heat Detector Tester
Watch the assembly and tour of the HST Series Heat Detector Tester for probe type, fire alarm heat detectors, thermal switches, rate compensation, rate of rise, and fixed temperature Heat detectors.
Options & Accessories
Streamline your workflow with these compatible add-ons:
HST compatible extension poles
Compatible extension poles that allow the HST Heat Detector Tester to test detectors mounted 30 feet high.
HST remote temperature readout cable
Cable allows you to connect with a digital voltmeter to read temperature of the test chamber.
HST Output Extension Cable
The heavy duty cable extends the length of the HST Remote Temperature Readout Cable to 27.5 feet.
HST power supply
Power supply for HST Heat Detector Testers. When used with the HST Power Supply Extension Cable, power can be supplied up to 20 feet.
HST power supply
Extension Cable
The heavy duty coiled cable extends the cable length of the HST Power Supply up to 20 feet.
HST Large Carry Bag
Perfect for carrying, protecting, and storing HST Heat Detectors Tester heads, cables, and inspection poles.
Ready to Customize Your Setup?
Contact us today for a quote or more information on these accessories.