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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


Weather measurement - FIFA Confederations Cup 2013 / FIFA World Cup 2014 - Brazil

The compact weather station WS301-UMB is part of a mobile station for measurement and monitoring of climate measurements during the FIFA...

FIFA World Cup 2014

We are very happy about the victory of our German soccer team and congratulate them most warmly!!!

Which important role the weather...

Webinar: Addressing Solar Monitoring Mystery

Tomorrow, October 1, 2014 2:00 PM - 3:00 PM EDT Lufft USA offers a webinar about new requirements set by California Independent Systems...

Lufft WSx-Firmware Update - Version 4.8

Please install the latest firmware version for your WSx sensors. With the installation of Version 4.8 you will get the following...

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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 range (50% points)300...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_V25.zipSoftware UMB-Config-Tool(6181KB)
Wind_Weather_e.pdfBrochure Wind & Weather (EN)(7683KB)
WSx-UMB_V27_e.pdfManual WSx-UMB from unit version 030 (ENG)(8026KB)
WSx_Release_V48.zipFirmware for WSxxx from unit version 030(177KB)
Traffic_Weather_e.pdfBrochure Transportation & Weather (EN)(7745KB)
Download - product data sheetDownload - product data sheet(1400KB)


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Power supply 24V/4A Power supply 24V/4A8366.USV1
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Connection cable 20m Connection cable 20m8370.UKAB20