Water-cooled heat flux sensor SBG01

calibration

Overview
SBG01 is a water-cooled sensor that measures heat flux. Since its introduction in 2008, SBG01 has rapidly become the sensor of choice for fire testing. The most common applications are to test reaction to fire and fire resistance. The sensor also serves as a calibration reference standard for test equipment, including flammability and smoke chamber tests. SBG01 complies with the requirements of most common ASTM and ISO standard test methods.

Key features

• ASTM and ISO standard compliance: Complies with the requirements of most common ASTM and ISO standard test methods, including ISO 14934 (Reaction-to-Fire tests — Calibration and use of heat flux meters).
• Next-level technology: Features a novel sensor design that combines the benefits of the technology of traditional Gardon gauges and the more recent thermopile technology of Schmidt-Boelter gauges.
• Effective water cooling: The sensor is cooled, usually via tap water, which keeps the sensor body relatively cool despite temperatures of the surrounding air and the radiant source reaching 1000 °C and higher.
• Open detector design: Using an open detector, SBG01 is also sensitive to convective heat flux—a contribution that is often overlooked.
• Robust and serviceable: Features robust and serviceable water tubes and a scratch-resistant absorber coating with a slightly lowered surface.
• Safe transport and storage: Supplied with a practical protection cap for safe transport and storage.
• Traceable calibration: Supplied with a calibration traceable to a secondary reference standard calibrated by comparison to the primary standard of the RISE Research Institutes of Sweden AB, factory calibrated according to ISO 14934-3.
• Available in six models: Available in 6 models, each with a different rated measurement range and with a different calibration reference irradiance level.

Applications

• Test reaction to fire and fire resistance.
• Calibration reference standard for test equipment, for example, in flammability and smoke chamber tests.
• Calibration of local working standards and verification under a local irradiance source, for example, a cone calorimeter.
• Measuring heat flux from strong radiative sources and environments with significant heat transfer by convection.

Specifications

• Measurand: Heat flux [W/m²]
• Sensor technology: both Gardon and Schmidt-Boelter
• Rated cooling water temperature range: 10 to 30 °C
• Rated cooling water flow: > 10 l/h (0.003 l/s), preferably 30 l/h (0.01 l/s)
• Rated measurement ranges: (5, 10, 20, 50, 100, 200) x 10 W/m²
• Response time: (63 %) at different rated measurement ranges:

– 5, 10 x 103 W/m² < 450 x 10-3 s
– 20, 50 x 103 W/m² < 250 x 10-3 s
– 100, 200 x 103 W/m² < 200 x 10-3 s

• Limiting measurement range: 150 % of rated measurement range
• Spectral range: 0 to 50 x 10-6 m
• Full field of view angle: 180°
• Black coating emmissivity: > 0.90
• Calibration traceability: to ITS-90
• Calibration laboratory:

– management system certification: ISO 9001
– accreditation: not accredited
– calibration method: SBGC secondary calibration method according to ISO 14934-3

• Standard cable length: 2m (see options)
• Order code standard version: SBG01/rated measurement range

Cable length and other options

• Standard 2m cable
• 5 m cable
• 10 m cable
• 20 m cable
• Smooth cylindrical body without flange (model SBG03)
• Thermocouple (Type T or K) can be fitted upon request