MS-21S Pyrgeometer

  • 4.5µm - 42µm flat spectral response
  • Lowest window heating offset
  • PT 100 / 4W temperature sensor
  • Smart interface: (MODBUS 485 RTU, SDI-12)
  • Diagnostic functions (relative humidity, temperature, tilt angle)
  • WISG traceable calibration
  • 5 years warranty
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The MS-21S pyrgeometer is added to the top of the range, of most accurate and robust infrared radiometers for scientific research applications. The analog sensor can measure longwave downwelling radiation and longwave net-radiation in a wide spectral band. In meteorology, wavelengths from 0.3 to about 4.5μm are called shortwave radiation, which is the solar radiation measured by a pyranometer. Wavelengths beyond the solar spectrum are called longwave radiation which is a function of the sky temperature and typically measured with a pyrgeometer. For climate research applications it is important to measure the earth surface radiation balance which is an important parameter and critical process indicator for climate change.

The MS-21S includes the new internal diagnostics system, and 2-channel smart interface. ...

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  Specifications MS-21S
  Output MODBUS 485 RTU, SDI-12
Response time 95% < 18 Sec.
Non-linearity < 1 %
Sensitivity > 10 - < 20 µV/W/m²
Temperature response -20°C to 50°C < 1 %
Window heating Offset < 4 W/m2
  Operating temperature range -40 - 80 °C
Wavelength range 4.5 - 42 µm
  Dome temperature -
  Body temperature PT-100
  Field of View FOV 180 °
  Power supply 5-30 VDC
Power consumption < 0.2 W
Additional signal processing errors < 1 W/m²
  Cable length 10 m