SBG01 heat flux meter

Water-cooled heat flux sensor

SBG01 is a water-cooled sensor that measures heat flux. The ISO standards call this a heat flux meter. Introduced in 2008, SBG01 has rapidly become the sensor of choice for fire testing. SBG01 is mainly used to test reaction to fire and fire resistance. It is also used as a calibration reference standard for test equipment, for example in flammability and smoke chamber tests. SBG01 complies with the requirements of the most common ASTM and ISO standard test methods.

Specifications

Measurand

heat flux

Measurement range

(5, 10, 20, 50, 100, 200) x 10³ W/m²

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Specifications

Measurand

heat flux

Measurement range

(5, 10, 20, 50, 100, 200) x 10³ W/m²

Measurand (in SI units)

irradiance in 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 10³ W/m²

Response time (63 %) at different 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

Output signal

DC voltage

Output signal range

> 5 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

> 0.90

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

2 m (see options)

Order code standard version

SBG01/rated measurement range/cable length

Options

rated measurement range (5, 10, 20, 50, 100, 200) x 10³ W/m²
longer cable (5 m, 10 m and 20 m)
smooth cylindrical body without flange (model SBG03)
thermocouple (type T or K) can be fitted upon request
for more options, see the user manual

Downloads

SBG01 brochure

SBG series user manual

Description

There are 6 models of SBG01

SBG01 measures heat flux in the range of (5 to 200) x 10³ W/m². Equipped with a black absorber, heat flux sensors of this type are designed for measurement in an environment in which heat flux is dominated by radiation. Using an open detector, SBG01 is also sensitive to convective heat flux. This contribution is usually ignored. Application in environments with lower than 50 x 10³ W/m² irradiance levels or environments with significant heat transport by convection is possible but requires a careful evaluation of the measurement uncertainty.

SBG01’s thermopile sensor generates an output voltage proportional to the incoming irradiance. The sensor is water-cooled. There are 6 models of SBG01; each with a different rated measurement range, calibration reference irradiance level, sensitivity and response time. Water cooling is usually supplied by tap water. There are several optional body designs. The standard body is equipped with a smooth cylindrical body and a flange. Common options are a smooth cylinder body without a flange (model SBG03). Also, a thermocouple (type T or K) can be fitted upon request.

Advantages

SBG01 has a novel sensor design, which combines the benefits of foil technology of the traditional Gardon gauges with those of the thermopile technology of the traditional Schmidt-Boelter gauges. SBG01 has several advantages:

robust and serviceable water tubes
scratch resistant absorber coating (slightly lowered surface)
safe storage with a practical protection cap

Suggested use

SBG01 has rapidly become the sensor of choice for fire testing. SBG01 is mainly used to test reaction to fire and fire resistance. It is also used as a calibration reference standard for test equipment for example in flammability and smoke chamber tests