OTT HydroMet - Model LUFFT WS400 - Smart Weather Sensor
Compact all-in-one weather sensor for measurement of temperature, relative humidity, precipitation intensity, precipitation type, precipitation quantity and air pressure. From the WS product family of professional intelligent measurement transducers with digital interface for environmental applications. Integrated design with ventilated radiation protection for measuring: Air temperature, relative humidity, precipitation intensity, precipitation type, precipitation quantity and air pressure. One external temperature sensor is connectable.
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Products Details
- Parameters measured: Temperature, relative humidity, precipitation intensity, precipitation type, precipitation quantity and air pressure
- Measurement technology: NTC/T, Capacitive/RH, MEMS capacitive/Pressure, 24 GHz Doppler radar/Precipitation
- Product highlights: Compact all-in-one weather sensor, low power, heater, aspirated radiation shield, maintenance-free operation, open communication protocol
- Interfaces: RS485 with supported protocols UMB-Binary, UMB-ASCII, Modbus-RTU, Modbus-ASCII, XDR and optional SDI-12
Advantages:
- All-in-one housing concept of a compact weather sensor combining several measurement parameters in one housing with only one cable connection
- Built-in data pre-processing, universal interfaces and selectable output protocols
- Compatible with many commercially available Met/HydroMet dataloggers and PLS systems thanks to an open communication protocol
- Maintenance-free operation – no moving parts that can wear out
- Suitable for all climate zones; also for solar-powered automatic meteorological stations
- Ventilated temperature and humidity measurement according to WMO guidelines
- Integrated heater that can be switched on if there is danger of frost
Examples of Use
The robust and maintenance-free smart weather sensor WS400 is designed for professional meteorological applications in all climate zones. It delivers reliable data, even in extreme ambient conditions.
Examples of use:
- Weather observation for road and traffic control systems
- Automatic weather station / Automatic weather sensor (AWS)
- PV-Monitoring / Solar Monitoring on photovoltaic farms
- Hydro-meteorological stations
- Weather observation for building automation
- Weather stations at airports, marinas and onboard ships
- Integration into various other systems/solutions, where environmental data is needed...
Product Variants
The Smart Weather Sensor WS400 is available in two product variants because of special laws concerning the use of radar technology in the UK, which is part of the precipitation measurement of the WS400.
- Smart Weather Sensor WS400-UMB - Country version: EU, USA and Canada (Article no. 8369.U01)
- Smart Weather Sensor WS400-UMB - Country version: UK (Article no. 8369.U02)
Technical Data:
General:
- Dimensions: Ø ca. 150 mm, height ca. 280 mm
- Weight: Approx. 1.3 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
- Mast mounting suitable for: Mast diameter 60 - 76 mm
Temperature:
- Principle: NTC
- Measuring range: -50 ... 60 °C
- Unit: °C
- Accuracy: ±0.2 °C (-20...50 °C), otherwise ±0.5 °C (>-30 °C)
Relative humidity:
- Principle: Capacitive
- Measuring range: 0 ... 100 % RH
- Unit: % RH
- Accuracy: ±2 % RH
Air pressure:
- Principle: MEMS capacitive
- Measuring range: 300 ... 1200 hPa
- Unit: hPa
- Accuracy: ±0.5 hPa (0...40 °C)
Precipitation (liquid):
- Droplet size: 0,3 … 5 mm
- Detection sensitivity: 0,01 mm/h
- Particle velocity: 0.9 ... 15.5 m/s
- Precipitation types: rain/ snow
- Solid precipitation: 5.1 ... ~30 mm
- Intensity range: 0…200mm/h
- Intensity resolution: 0.01 mm/h
- Amount resolution: 0.1 mm
- Accuracy: 20 % under laborary conditions
- Reproducibility: Typical >90 % under laborary conditions
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