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WS301-UMB Smart Weather Sensor | All-in-one sensors,Radiation


From the WS product family of professional intelligent measurement transducers with digital interface for environmental applications. Integrated design with ventilated radiation protection for measuring: -Air temperature -Relative humidity - Solar radiation -Air pressure

Supplementary description:

Relative humidity is measured by means of a capacitive sensor element; a precision NTC measuring element is used to measure air temperature. The world renowned technology of Kipp+Zonen CMP3 is integrated. Measurement output can be accessed by the following protocolls: UMB-Binary, UMB-ASCII, SDI-12, MODBUS. One external temperature or rain sensor is connectable.

Special features:

  • Aspirated temperature/humidity measurement
  • Open communication protocol:
  • UMB-Binary
  • SDI-12
  • Analoge outputs in combination with 8160.UDAC
  • Third-Party-Rain gauge sensors are compatible: 0.1mm, 0.2mm, 0.5mm, 1mm heated and unheated

Download - product data sheet


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Price:On request
Quantity ordered:

Technical data

WeightApprox. 1.3kg
InterfaceRS485, 2-wire, half-duplex
Power supply4...32 VDC
Operating temperature-50...60°C
Operating rel. humidity0...100% RH
Heating20VA at 24 VDC
DimensionsØ approx. 150mm, height approx. 268mm
Protection level housingIP66
Mast mounting suitable formast diameter 60 - 76mm


Measuring range-50 ... 60 °C
Accuracy±0.2°C (-20...50°C), otherwise ±0.5°C (>-30°C)

Relative humidity

Measuring range0 ... 100 % RH
Unit% RH
Accuracy±2% RH

Air pressure

PrincipleMEMS capacitive
Measuring range300 ... 1200 hPa
Accuracy±0.5 hPa (0...40°C)


Response time (95%)< 18s
Non-stability (change/year)< 1%
Non-linearity (0 to 1,000W/m²)< 1%
Directional error (at 80° with 1,000W/m²)< 20W/m²
Temperature dependence of sensitivity< 5% (–10... +40°C)
Tilt error (at 1000W/m²)< 1%
Spectral range300...2800nm
Measuring range1400W/m²
Altitude 0...60°


UMB_Technology_e.pdfBrochure UMB Technology (ENG)(6661KB)
WSx-UMB_V15_e.pdfManual WSx-UMB only up to unit version 029 (ENG)(5460KB)
WSx_Release_V31.zipFirmware for WSxxx only up to unit version 029(145KB)
UMB_Config_V26.zipSoftware UMB-Config-Tool(6181KB)
Wind_Weather_e.pdfBrochure Wind & Weather (EN)(7470KB)
WSx-UMB_V27_e.pdfManual WSx-UMB from unit version 030 (ENG)(8026KB)
WSx_Release_V55.zipFirmware for WSxxx from unit version 030(168KB)
Traffic_Weather_e.pdfBrochure Transportation & Weather (EN)(7531KB)
Download - product data sheetDownload - product data sheet(1400KB)


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