Lufft WS401 Compact Weather Sensor
The Lufft WS401 is a compact all-in-one weather sensor measuring air temperature, relative humidity, air pressure and precipitation via a top-mounted tipping-bucket rain gauge, in a single WMO-compliant, aspirated unit with no separately mounted rain gauge required.
- Range
- -50 to 60 °C
- Output
- RS485 Modbus (SDI-12 optional)
- Ingress
- IP66
Overview
In detail
How it works
The WS401 combines temperature, humidity, air pressure and precipitation sensing behind an aspirated radiation shield, giving WMO-compliant accuracy with no moving parts other than the tipping-bucket gauge. Because the rain gauge is built into the top of the unit, no separate gauge or plinth is needed. Data processing is built in, and the sensor is rated -50 to +60°C for use in all climates.
Connectivity
Ships standard with RS485 Modbus communications; SDI-12 is available on request at time of order. The open protocol (UMB-Binary, UMB-ASCII, Modbus-RTU/ASCII, XDR, SDI-12) is compatible with most commercial Met/HydroMet dataloggers and PLC systems.
Mounting & options
Mounts directly onto a 60 mm diameter pole using the supplied 'U' brackets, or via an optional mounting arm for 40-80 mm poles. An external temperature probe (for back-of-panel PV temperature) and the Lufft WTB100 rain gauge are available as options.
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Specifications
Technical specifications
- Range
- -50 to 60 °C
- Operating temperature
- -50 to 60°C (with heater)
- Accuracy
- ±0.2 °C (-20 to 50 °C), otherwise ±0.5 °C (>-30 °C)
- Ingress
- IP66
- Supply voltage
- 11-32 VDC standard (5-11 VDC reduced-accuracy mode); 24 VDC ±10% for heater
- Output
- RS485 Modbus (SDI-12 optional)
- Humidity range
- 0-100% RH
- Humidity accuracy
- ±2% RH
- Air pressure range
- 300-1200 hPa
- Air pressure accuracy
- ±0.5 hPa (0-40 °C)
- Precipitation resolution
- 0.2 mm (0.5 mm with reduction ring)
Related
Often specified alongside
Weathertech
X-LAS MkII Scintillometer
- Path length
- 1 to 12 km
- Dimensions
- 1010 x 552 x 426 mm (with sunshield) 18,75 kg
- Wavelength
- 850 nm
- Range
- 0-100,000 µS/cm ±2%
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