Specifications
| Measurand |
heat flux,temperature |
| Measurement range |
0 to 800 x 10³ W/m² |
| Measurand in SI units |
heat flux density /irradiance in W/m² |
| Heat flux sensor |
thermopile |
| Temperature sensor |
thermocouple type K |
| Sensitivity (nominal) |
9 x 10⁻⁹ V/(W/m²) |
| Calibration traceability |
to SI units |
| Rated operating temperature ranges |
: |
| sensor and black coating |
-30 to +650 °C |
| high-temperature cable |
-30 to +900 °C |
| low-temperature extension cable |
-30 to +240 °C |
| IP protection class |
IP67 |
| Standard cable lengths |
: |
| high-temperature cable |
1 m (see options) |
| low-temperature extension cable |
3 m (see options) |
| Rated cooling water temperature range |
10 to 30 °C |
| Rated cooling water flow |
> 30 l/h (0.01 l/s), preferably 100 l/h (0.03 l/s) |
| Output signal |
DC voltage |
| Output signal range |
10 x 10⁻³ V at rated measurement range |
| Spectral range |
0 to 50 x 10⁻⁶ m |
| Full field of view angle |
180° |
| Black coating emissivity |
0.92 (estimate) |
| Order code |
HFS01 - high-temperature cable length in m - low-temperature extension cable length in m |
Options
- Longer cable (please specify total cable length for both cable types in m)
- Connector at end of cable HFS01
- Low temperature extension cable with 2 connectors, cable connector and matching chassis connector
- Chassis connector with internal wiring (wire colour code identical to cable colour code)
- Blank metal sensor surface, uncoated
Description
The HFS01 measures heat flux in the range (0 to 800) x 10³ W/m²; the extremely high fluxes generated by flames and solar concentrators.
Equipped with a black absorber, the instrument is designed for measurement in an environment where the heat flux includes radiation and convection. The HFS01 thermopile sensor generates an output voltage proportional to the total absorbed heat flux. The sensor must be water-cooled. Water cooling is usually supplied by tap water. A removable flange is supplied with the sensor which can be used for mounting. In addition, a K-type thermocouple is included to measure the temperature of the sensor body.
The part of the wiring closest to the sensor is a special high-temperature metal-sheathed cable with an intertwined spiral stainless steel armor. The cable and high-temperature armor withstand temperatures up to 900 °C. Because the sensor body is water-cooled, it will remain relatively cool. The sensor surface temperature can reach 650 °C. The low temperature extension cable has a PTFE type plastic cover.
The HFS01 sensor can also be ordered without black coating, so that the HFS01's radiation absorption is reduced, while it remains sensitive to convective radiation. Users can also coat the HFS01 with their own coating, to create a different response to radiation.
The HFS01 has several advantages:
- very robust all-metal/ceramic instrument body and sensor
- high temperature signal cable
- signal cables electrically isolated from the sensor body and cooling water
The HFS01 is easy to use. It can be connected directly to commonly used data logging systems. The heat flux, in W/m², is calculated by dividing the HFS01 output, a small voltage, by the sensitivity. The sensitivity is given with the HFS01 in its product certificate. Equipped with heavy duty wiring and a fully stainless steel housing that prevents moisture from penetrating the sensor, the HFS01 has proven to be highly reliable.
The calibration of the HFS01 is traceable to international standards. The factory calibration method follows ASTM C1130-07 (2012) recommended practice.
Suggested use
- solar concentrators
- flame research
- fluidized beds
