The GESTER GT-C95 Heat Transfer Index Tester is designed to evaluate heat transmission through protective clothing materials and heat-resistant material assemblies under controlled flame exposure. This short operation video demonstrates the testing process, including specimen positioning, flame exposure, calorimeter measurement, temperature monitoring, and test-time recording. Designed for ISO 9151 / EN ISO 9151 heat transmission testing, the GT-C95 is suitable for PPE manufacturers, protective clothing producers, textile laboratories, quality control departments, and testing institutions. With a heat flow density of ≥40 kW/m², a 20–200°C temperature measurement range, and a 0–100 s timing range, the tester provides a practical solution for laboratory evaluation and comparison of thermal protective materials.
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Heat Transfer Index Tester GT-C95: Operation Video & ISO 9151 Heat Transmission Testing
2026-08-26
Watch the GT-C95 Heat Transfer Index Tester in operation and learn how heat transmission through protective materials is evaluated under flame exposure.
The GESTER GT-C95 Heat Transfer Index Tester is designed for evaluating the heat transmission performance of protective clothing materials, fire-resistant textiles, firefighting materials and other heat-protective assemblies.
In this short operation video, see how the tester is prepared, how the test specimen is positioned, how the flame exposure is applied, and how the temperature rise and testing time are monitored.
Model: GT-C95
Test Method: Heat Transmission Through Protective Materials
Main Standard: EN367, ISO 9151
Application: Protective Clothing, Fire-Resistant Materials & PPE Testing
What Is a Heat Transfer Index Tester?
A Heat Transfer Index Tester is laboratory testing equipment used to evaluate how quickly thermal energy is transmitted through protective materials when exposed to a specified flame heat source.
For protective clothing and heat-resistant materials, heat transmission performance is an important consideration because the material structure can influence how rapidly heat reaches the side facing the wearer.
The ISO 9151 HTI test device GT-C95 measures the time required for the calorimeter temperature to increase by a specified amount under controlled test conditions. This result can be used as a Heat Transfer Index (HTI) for comparing the relative heat transmission performance of materials.
The ISO 9151 method is specifically intended for materials or material assemblies used in protective clothing.
Why Heat Transfer Testing Matters
Heat-resistant appearance alone does not provide enough information about the thermal transmission characteristics of a protective material.
Heat transfer testing can support:
Protective clothing material development
Fire-resistant textile evaluation
PPE quality control
Material comparison
Laboratory testing
Product performance verification
Protective clothing research and development
Production quality assurance
Why Choose GESTER Heat Transmission Resistance Test Device GT-C95?
Selecting a thermal testing machine is not only about the equipment itself. For buyers, long-term technical support, manufacturing capability and application experience are equally important.
Professional PPE Testing Equipment Manufacturer
GESTER focuses on testing equipment for protective gloves, protective clothing, footwear, masks, helmets and textile materials, providing equipment solutions for PPE and material performance testing.
Built for Laboratory Testing
Heat Transfer Index Tester GT-C95 provides controlled heat exposure, temperature measurement and test-time monitoring in a dedicated laboratory testing system.
Clear Digital Monitoring
The equipment is designed to digitally display key test information including flame temperature, measurement temperature and time, helping operators monitor the test process.
International Market Experience
GESTER supplies testing equipment to international customers and supports manufacturers, laboratories, inspection organizations and quality-control teams.
Frequently Asked Questions About Shoe Material Testing Equipment
1
What is a Heat Transfer Index Tester?
A Heat Transfer Index Tester is laboratory equipment used to evaluate heat transmission through protective materials under controlled flame exposure. The resulting heat transfer index can be used to compare the relative heat transmission performance of materials under specified test conditions.
2
What is the Heat Transmission Resistance Test Device GT-C95 used for?
The Heat Transmission Resistance Test Device GT-C95 is designed for heat transmission testing of textiles, firefighting materials, protective clothing materials and other heat-resistant or flame-resistant materials.
3
Which standard does Heat Transfer Index Tester GT-C95 follow?
The current Heat Transfer Index Tester GT-C95 product page lists EN 367 and ISO 9151. For current international standard referencing, ISO 9151 / EN ISO 9151 should be used.
4
What is ISO 9151?
ISO 9151 is the international standard titled Protective clothing against heat and flame — Determination of heat transmission on exposure to flame. It specifies a method for determining heat transmission through materials or material assemblies used in protective clothing.
5
What is the Heat Transfer Index?
The Heat Transfer Index is a value used to rank materials according to heat transmission under the specified test conditions. It should not be interpreted as the exact protection time of a material during actual use.
6
What is the heat flow density of ISO 9151 HTI test device GT-C95?
The product specification lists a heat flow density of ≥40 kW/m².
7
What is the temperature measurement range?
The temperature measurement range is 20°C to 200°C.
8
Can Heat Transfer Index Test Apparatus GT-C95 be used for protective clothing testing?
Yes. The Heat Transfer Index Test Apparatus is designed for evaluating heat transmission characteristics of protective clothing materials and other thermal protective materials.
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