Lufft WS501 Multi-Parameter Weather Sensor
Features
- Spectral range of 300 to 2800 nautical miles
- Easily mounts to 2" diameter pipe with integrated bracket mount & U-bolts
- SDI-12 output for integration with NexSens and other data loggers
- Free ground shipping
- Expedited repair and warranty service
- Lifetime technical support
- More
Overview
The Lufft family of multi-parameter weather sensors offer a cost-effective, compact alternative for the acquisition of a variety of measurement parameters on land- and buoy-based weather stations. Depending on the model, each sensor will measure a different combination of weather parameters to meet a wide variety of applications. The Lufft WS501 is a multi-parameter weather sensor that integrates the Kipp & ZonencmP 3 pyranometer and sensors for air temperature, humidity, pressure, solar radiation & wind.
Air Temperature & Humidity
Temperature is measured using a highly accurate NTC-resistor, while humidity is measured using a capacitive humidity sensor. Both sensors are located in a ventilated radiation shield to reduce the effects of solar radiation.
Pressure
Absolute air pressure is measured using a built-in MEMS sensor. The relative air pressure referenced to sea level is calculated using the barometric formula with the aid of the local altitude, which is user-configurable on the equipment.
Wind Speed & Direction
The wind sensor uses four ultrasound sensors which take cyclical measurements in all directions. The resulting wind speed and direction are calculated from the measured run-time sound differential.
Compass
The integrated electronic compass can be used to check the north-south adjustment of the sensor housing for wind direction measurement. It is also used to calculate the compass-corrected wind direction.
Solar Radiation
The pyranometer is intended for shortwave global solar radiation measurements in the spectral range from 300 to 2800nm. The thermopile sensor construction measures the solar energy that is received from the total solar spectrum and the whole hemisphere. The output is expressed in Watts per square meter.
- Air Temperature
- Principle: NTC
- Measuring Range: -50 to +60 C
- Resolution: 0.1 C (-20 to +50 C); otherwise 0.2 C
- Accuracy: +/-0.2 C (-20 to +50 C); otherwise +/-0.5 C
- Units: C; F
- Humidity
- Principle: Capacitive
- Measuring Range: 0 to 100% RH
- Resolution: 0.1% RH
- Accuracy: +/-2% RH
- Units: % RH; g/m3; g/kg
- Pressure
- Principle: Capacitive
- Measuring Range: 300 to 1200hPa
- Resolution: 0.1hPa
- Accuracy: +/-1.5hPa
- Unit: hPa
- Radiation
- Response Time (95%): 18s
- Non-Stability (change/year): ±1%
- Non-Linearity (0 to 1,000 W/m2): ±2.5%
- Directional Error (at 80° with 1,000 W/m2): ±20 W/m2
- Temperature Dependence of Sensitivity: ±5% (–10 to +40° C)
- Tilt Error (at 1000 W/m2): ±3%
- Spectral Range (50% points): 300 to 2,800 nm
- Measuring Range: 1400 W/m2
- Wind Speed
- Principle: Ultrasonic
- Measuring Range: 0 to 60m/s
- Resolution: 0.1m/s
- Accuracy: +/-0.3m/s or 3% (0 to 35m/s); +/-5% (>35m/s)
- Response Threshold: 0.3m/s
- Units: m/s; km/h; mph; kts
- Wind Direction
- Principle: Ultrasonic
- Measuring Range: 0 to 359.9 degrees
- Resolution: 0.1 degrees
- Accuracy: +/-3 degrees
- Response Threshold: 0.3m/s
- Compass
- Principle: Integrated Electronic Compass
- Measuring Range: 0 to 359.9 degrees
- Resolution: 1.0 degree
- Technical Data
- Interface: SDI-12, Modbus
- Operating Temperature: -50 to +60 C
- Operating Humidity: 0 to 100% RH
- Included Cable Length: 10m
- (1) WS501 Multi-Parameter Weather Sensor
- (1) 10m sensor cable
- (1) Operations manual
Select Options
In The News
Suttle Lake Data Buoy Answers Salmon Questions
Oregon’s Suttle Lake is home to populations of kokanee salmon, best described as the landlocked version of sockeye salmon. In 2003, kokanee salmon there were anywhere from 12 to 18 inches long. Nowadays, their average size is around a mere nine inches according to the U.S. Forest Service (USFS). Clearly something is going on with kokanee salmon in Suttle Lake. But there has also been a recent resurgence of sockeye using the lake as well, thanks to dam removal projects and stream modifications by USFS fisheries biologists that have helped reduce difficulty for fish passage. To help improve understanding of both types of salmon that live in Suttle Lake, officials at the High Lakes Aquatic Alliance Foundation (HLAAF) have launched a water quality monitoring buoy in the water body.
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Lufft WS-Series Weather Stations: A history of weather monitoring translates to high quality weather sensing options
Gotthilf Lufft started building mechanical weather sensors in 1881. “They really began by measuring temperature and humidity in the most basic sense,” said Ann Pattison, Lufft USA product manager. More than 130 years later, the company is still building weather monitoring technology. For their most recent rendition of weather stations, Lufft engineers traded mechanical dials and horse hair for ultrasonic transducers and pyrometers to create a line of electronic all-in-one weather stations called the WS-Series. The systems have a modular formula that can be tailored to customer’s applications. In fact, many of the ready-made combinations Lufft offers, like a weather station with built-in tipping bucket rain gauge, were inspired by customers.
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NASA develops ocean surface wind speed measurements through GPS
Researchers from the NASA Langley Research Center in Hampton, Va., have discovered that GPS signals can be used to accurately measure wind speed at the ocean’s surface, National Geographic has reported. Researchers have concluded that by measuring the distortion in GPS signals bouncing off the ocean’s waves, they can successfully measure wind speed, even in the case of hurricanes and extreme weather. To measure the accuracy of using GPS for wind measurements, NASA scientists placed GPS receivers on NOAA research planes. They concluded that GPS data has an accuracy capable of detecting wind speeds within 11 miles per hour.
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