Description
Lufft WS502 all-in-one compact weather station
The Lufft WS502 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 WS502 compliant according to WMO guidelines.
The top-mounted pyranometer provides accurate solar irradiance measurements.
The WS502 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 WS502 incredibly robust and easy to use.
As standard, we supply the Lufft WS502 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. 317 mm |
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 | 20 VA (heater) |
Operating temperature | -50 to 60 °C (with heater) |
Operating rel. humidity | 0 to 100 % RH |
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 to 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 |
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Principle | MEMS capacitive |
Measuring range | 300 to 1200 hPa |
Unit | hPa |
Accuracy | ±0.5 hPa (0 to 40 °C) |
Radiation (non-CMP/SMP) |
|
Unit | W/m² |
Accuracy | 0.05 |
Response time (95%) | < 1 s |
Non-stability(change/year) | ±1 % |
Non-linearity (0 to 1000 W/m²) | ±1 % |
Directional error (at 80° with 1000 W/m²) | ±20 W/m² |
Temperature dependence of sensitivity | ±5 % (-10 to +40 °C) |
Tilt error (at 1000 W/m²) | ±1 % |
Spectral range | 300 to 1100 nm |
Measuring range | 1400 W/m² |
Wind direction |
|
Principle | Ultrasonic |
Measuring range | 0 to 359.9 ° |
Unit | ° |
Accuracy | < 3 ° RMSE > 1.0 m/s |
Resolution | 0.1 |
Wind speed |
|
Principle | Ultrasonic |
Measuring range | 0 to 75 m/s |
Unit | m/s |
Accuracy | ±0.3 m/s or ±3 % (0 to 35 m/s) ±5 % (>35 m/s) RMS |
Resolution | 0.1 m/s |
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 WS502 compatible with?
The WS502 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