High-temperature heat flux sensor GG01

monitoringwater-cooled

Overview
GG01 is a water-cooled sensor that measures extremely high heat fluxes, up to 1000 x 10³ W/m². Made from high thermal conductivity copper and copper alloys, this modern all-metal sensor keeps working at heat flux levels where other sensors get toasted. An optional sapphire window allows measurement of radiative heat flux only, excluding the convective heat flux. GG01 features an on-board Type K thermocouple and is available with various dedicated measurement ranges. For lower flux ranges, see our SBG01.

Key features
• Withstands extremely high heat fluxes: Robust all-metal Gardon gauge construction engineered from high thermal conductivity copper and copper alloys to measure up to 1000 x 10³ W/m².
• Effective water cooling: Tap-water cooling keeps the body relatively cool in environments where radiant source and air temperatures reach 1000 °C and higher; tested to withstand 10 bar cooling water operating pressure.
• Fast response time: Provides rapid nominal response times (63 %) down to 100 x 10⁻³ s depending on the rated measurement range.
• Integrated body temperature sensor: Equipped with an on-board Type K thermocouple to measure sensor body temperature.
• Optional convective exclusion: Available with an optional sapphire window (model GG01-250-SW) to measure radiative heat flux only, excluding the convective contribution.
• High-vacuum compatibility: Suitable for operation in high-vacuum environments.
• Flanged body design: Sensor body is equipped with an integrated mounting flange for straightforward mechanical installation.
• Safe transport and storage: Supplied with a practical protection cap to safeguard the sensor surface.
• Traceable calibration: Factory calibrated according to ISO 14934-3, traceable to secondary reference standards calibrated against the primary standard high-temperature source of RISE Research Institutes of Sweden AB.

Applications
• Solar concentrators.
• Flame research.
• Fluidized beds.
• Rocket engine exhaust flames.
• High-temperature testing cabinets and strong radiative sources.

Specifications
• Measurand: Heat flux
• Measurand in SI units: Irradiance in W/m²
• Sensor technology: Gardon gauge
• Rated measurement ranges: (250, 500, 1000) x 10³ W/m²
• Limiting measurement range: 150 % of rated measurement range
• Nominal response time (63 %):
• 250 x 10³ W/m²: 250 x 10⁻³ s
• 500 x 10³ W/m²: 200 x 10⁻³ s
• 1000 x 10³ W/m²: 100 x 10⁻³ s
• Output signal: DC voltage
• Output signal range: > 4 x 10⁻³ V at rated measurement range
• Integrated temperature sensor: Type K thermocouple
• Full field of view angle: 180°
• Spectral range: (0 to 50) x 10⁻⁶ m
• Rated cooling water flow: > 50 l/h (0.014 l/s)
• Cooling water operating pressure test: 10 bar
• Calibration traceability: To ITS-90
• Calibration method: Secondary calibration method according to ISO 14934-3
• Standard cable length: 2 m

Versions and options
• GG01-250: 250 kW/m² rated measurement range
• GG01-250-SW: 250 kW/m² rated measurement range, with sapphire window
• GG01-500: 500 kW/m² rated measurement range
• GG01-1000: 1000 kW/m² rated measurement range
• Standard cable length: 2 m (‘-02’)
• Longer cable options: 5 m (‘-05’) and 10 m (‘-10’)