SBG01

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.

  • Robust and serviceable water tubes
  • Scratch resistant absorber coating (slightly lowered surface)
  • Safe storage with a practical protection cap
  • Durable cable with strain relief, temperature resistant up to 200 °C
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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 flange. Common options are a smooth cylinder body without a flange (model -C) and threaded body (model –T).  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

Areas of Application

  • Industrial monitoring and control / heat flux and heat transfer measurement
  • Scientific research / heat and heat transfer measurement

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
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

> 0.95
Calibration traceability

to ITS-90
- 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 (specify total cable length in m)
• High temperature cable rated temperature range to 400 °C (specify length in m)
• Type T or type K thermocouple connected to instrument body (specify –TCT or – TCK), wire exiting next to signal cable. Wire diameter 0.5 x 10⁻³ m
• Smooth cylindrical body without flange (specify – C)
• Threaded cylindrical body without flange (specify – T), thread 1-12 UNF

Downloads

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