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WS400-UMB Smart Weather Sensor | All-in-one sensors


Country version: EU, USA and Canada

Supplementary description:

WS400-UMB Smart Weather Sensor for measuring of air temperature, relative humidity, precipitation intensity, precipitation type, precipitation quantity and air pressure. Relative humidity is measured by means of a capacitive sensor element; a precision NTC measuring element is used to measure air temperature. Precipitation is measured by a 24 GHz Doppler radar, which measures the drop speed of an individual drop of rain/snow. Precipitation quantity and intensity are calculated from the correlation between drop size and speed. The difference in drop speed determines the type of precipitation (rain/snow). Maintenance-free measurement offers a major advantage over the common tipping spoon and tipping bucket processes. Measurement output can be accessed by the following protocolls: UMB-Binary, UMB-ASCII, SDI-12, MODBUS. One external temperature sensor is connectable.

Special features:

  • Maintenance-free operation
  • Aspirated temperature/humidity measurement
  • Open communication protocol:
  • UMB-Binary
  • SDI-12
  • Analoge outputs in combination with 8160.UDAC

Download - product data sheet


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Price:On request
Quantity ordered:

Technical data

DimensionsØ ca. 150mm, height ca. 280mm
WeightApprox. 1.3kg
InterfaceRS485, 2-wire, half-duplex
Power supply4...32 VDC
Operating temperature-50...60°C
Operating rel. humidity0...100% RH
Heating20VA at 24VDC
Cable length10m
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)

Precipitation intensity

Resolution0.1 mm/h

Precipitation quantity

ReproducibilityTypical >90%
Measuring range drop size0.3...5mm
Type of precipitationRain/snow


UMB-Protokoll 1_0 Version 1_6_e.pdfUMB Protocol (ENG)(904KB)
UMB-Config-Tool_V26_e.pdfUMB-config-tool instruction (ENG)(1617KB)
SmartView3_V2_5_3_en.pdfManual SmartView3 (ENG)(3344KB)
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_V27.zipSoftware UMB-Config-Tool(6969KB)
Wind_Weather_e.pdfBrochure Wind & Weather (EN)(7470KB)
SmartView3_Database_Tables_V2_3_1.pdfDatabase Tables SmartView3 (GB)(878KB)
WSx-UMB_V32_e.pdfManual WSx-UMB from unit version 030 (ENG)(8362KB)
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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