Description
Lufft WS401 all-in-one compact weather station
The Lufft WS401 is ideal for measuring air temperature, relative humidity, solar irradiance, and air pressure. It is suitable for high-end applications where accuracy and build quality cannot be compromised.
The sensors are protected by a radiation shell for protection and to ensure measurement accuracy, making the WS401 compliant according to WMO guidelines.
The top-mounted tipping bucket rain gauge provides excellent measurements of precipitation. The gauge means you do not need to have a separately mounted rain gauge, so no requirements to make a separate plinth.
The WS401 is suitable for all climates, with a temperature range of -50 to +60 °C. There are no moving parts and data processing is built-in. This makes the WS400 incredibly robust and easy to use.
As standard, we supply the Lufft WS401 with Modbus communications. However, it is possible to supply the sensor with SDI-12. Please let us know at the time of ordering which you would prefer.
As with all WS series compact weather sensors, it is possible to fit a temperature probe. The probe measures surface temperature and is ideal for the PV solar sector to measure the back of panel temperature.
General |
|
| Dimensions | Ø ca. 150mm, height ca. 380mm |
| Weight | Approx. 1.5 kg |
| Interface | RS485, 2-wire, half-duplex |
| Power supply | 11 to 32 VDC |
| Power supply | 5 to 11 VDC (electronics with limited precision of measurements) |
| Power supply | 24 VDC +/- 10% (heater) |
| Power consumption | 40 VA (heater) |
| Operating temperature | -50 to 60°C (with heater) |
| Operating rel. humidity | 0 to 100% RH |
| Cable length | 10m |
| Protection level housing | IP66 |
| Mast mounting suitable for | mast diameter 60 – 76mm |
Temperature |
|
| Principle | NTC |
| Measuring range | -50 to 60 °C |
| Unit | °C |
| Accuracy | ±0.2 °C (-20…50 °C), otherwise ±0.5 °C (>-30 °C) |
Relative humidity |
|
| Principle | Capacitive |
| Measuring range | 0 to 100 % RH |
| Unit | % RH |
| Accuracy | ±2 % RH |
Air pressure |
|
| Principle | MEMS capacitive |
| Measuring range | 300 to 1200 hPa |
| Unit | hPa |
| Accuracy | ±0.5 hPa (0 to 40 °C) |
Precipitation (Tipping bucket) |
|
| Resolution | 0.2 mm |
| Accuracy | ±2 % |
| Max. intensity | 360 mm/h |
Precipitation with reduction ring |
|
| Resolution | 0.5 mm |
| Accuracy | ±2 % |
| Max. intensity | 144 mm/h |
WS Series Frequently asked questions.
How do I mount my WS sensors?
The sensor can be mounted directly onto a 60mm diameter pole. The sensors come with ‘U’ mounting brackets. A mounting arm (which can attach to 40-80mm diameter poles) can be supplied too.
Are other communications protocols possible?
Possible interfaces are RS485 with supported protocols UMB-Binary, UMB-ASCII, Modbus-RTU, Modbus-ASCII, XDR, and SDI-12.
What data logger is the WS401 compatible with?
The WS401 is compatible with many commercially available Met/HydroMet dataloggers and PLS systems thanks to an open communication protocol.
Optional Extras:
- External temperature probe (can be used as a back of module temperature sensor)
- Rain gauge Lufft WTB100
