Heat Flux Sensors
MesoScribe’s differential heat flux sensors are designed for harsh operating environments involving high temperatures, corrosive products, and high-speed flows (subsonic to supersonic). Devices are customized based on the application requirements such as operating temperature, longevity, and sensitivity, for flexible, cost-effective implementation.
Direct Write heat flux sensors (HFS) use a multilayer thermopile, oriented so that incident heat flux generates a thermal gradient, and an output voltage. Sensitivity depends upon the properties of the dielectric, the thermoelectric alloys, and the number of thermopile junctions, so it can be tailored by application. Systematic calibrations are conducted to determine device sensitivity and dynamic response.
Key Features
- Integrated temperature and heat flux measurement
- Sensitivities as high as 5 mV/BTU-ft2·s with response times under 10 ms
- Thermocouple alloys selected to meet the working temperature and longevity requirements
- Devices can be embedded within thermal barrier coatings (TBCs) or thermal protection systems (TPSs) for enhanced survivability and non-intrusive implementation
Thermopiles, the key component of Direct Write heat flux sensors, are also available from MesoScribe in planar and multilayer configurations. Each device is optimized for the local thermal gradients and thermoelectric materials selection. NIST standard (Type E, K, and N) or precious metal thermocouple systems can be chosen, depending upon operating temperature and durability requirements. Direct Write thermopiles can be deployed for thermoelectric energy harvesting applications, or as the diagnostic component of condition monitoring and integrated health management systems.
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