From the Lufft WS product family of professional intelligent measurement transducers with digital interface for environmental applications.

Enquire about this product
WS300 UMB Compact Weather Station

Key features

  • All-in-one housing concept of a compact weather sensor combining several measurement parameters in one housing with only one cable connection
  • Built-in data pre-processing, universal interfaces and selectable output protocols
  • Maintenance-free operation – no moving parts that can wear out
  • Compatible with many commercially available Met/HydroMet data loggers and PLS systems thanks to an open communication protocol
  • Suitable for all climate zones; also for solar-powered automatic meteorological stations
  • Ventilated temperature and humidity measurement according to WMO guidelines

The WS300-UMB Compact Weather Station for measuring of air temperature, relative humidity 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. Measurement output can be accessed by the following protocols: UMB-Binary, UMB-ASCII, SDI-12, MODBUS.

Technical specification


Principle NTC
Measuring Range -50...60°C
Accuracy ±0,2°C (-20°C...+50°C), otherwise ±0.5°C (>-30°C)

Relative Humidity

Principle Capacitive
Measuring Range 0...100% RH
Accuracy ±2% RH

Air pressure

Principle MEMS Capacitive
Measuring range 300…1200hPa
Accuracy ± 0.5 hPa (0...+40°C)

General Information

Protection type housing IP66
Interface RS485, 2-wire, half-duplex
Operating Power Consumption 12-24 VDC ±10%
Operating Humidity Range 0...100%
Operating Temperature Range -50...60%°C