Description
Lufft WS501 all-in-one compact weather station
The Lufft WS501 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 WS501 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 WS501 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 WS501 incredibly robust and easy to use.
As standard, we supply the Lufft WS501 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 approx. 150 mm, height approx. 332 mm |
| Weight | Approx. 1.5 kg |
| Interface | RS485, 2 – wire, half – duplex |
| Power supply | 11…32 VDC |
| Power supply | 5…11 VDC (electronics with limited precision of measurements) |
| Power supply | 24 VDC +/- 10% (heater) |
| Power consumption | 20 VA (heater) |
| Operating temperature | -50…60 °C (with heater) |
| Operating rel. humidity | 0…100 % RH |
| Cable length | 10 m |
| Protection level housing | IP66 |
| Standards/Regulations | Compliant to IEC 61724-1:2017 Class C |
| Mast mounting suitable for | Mast diameter 60 – 76 mm |
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) |
Wind direction |
|
| Principle | Ultrasonic |
| Measuring range | 0 … 359.9 ° |
| Unit | ° |
| Accuracy | < 3 ° RMSE > 1.0 m/s |
| Resolution | 0.1 |
Wind speed |
|
| Principle | Ultrasonic |
| Measuring range | 0 … 75 m/s |
| Unit | m/s |
| Accuracy | ±0.3 m/s or ±3 % (0…35 m/s) ±5 % (>35 m/s) RMS |
| Resolution | 0.1 m/s |
Radiation |
|
| Response time (95%) | < 18 s |
| Non-stability (change/year) | < 1 % |
| Non-linearity (0 to 1,000W/m²) | < 1 % |
| Directional error (at 80° with 1,000W/m²) | < 20 W/m² |
| Temperature dependence of sensitivity | < 5 % (10… +40 °C) |
| Tilt error (at 1000W/m²) | < 1 % |
| Spectral range | 300…2800 nm |
| Measuring range | 2000 W/m² |
Compass |
|
| Measurement range | 0 … 359° |
| Resolution | 1.0° |
| Accuracy | +/-10° |
| Sampling rate | 5 minutes |
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 WS501 compatible with?
The WS501 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
