Weather Transmitter and Humidity/Temp Probe

Model 6501V-H and 6539B

  • Overview

    With the world becoming increasingly sensitive to weather and climate, it is important to measure the weather accurately. The Weather Transmitter 6501V-H offers a six-in-one solution to measure barometric pressure, humidity, precipitation, temperature, and wind speed and direction – all with one instrument!

    Compact and lightweight, the 6501V-H is suitable for weather stations, dense networks, buildings, golf courses, marinas, harbors, and hotels – almost anywhere where real time weather data is needed. Accurate and reliable data provided to you early enough can increase safety to life and property.

    To measure wind speed and direction, the 6501V-H has the Vaisala WINDCAP® sensor that uses ultrasound to determine horizontal wind speed and direction. The array of three equally spaced transducers on a horizontal plane is a Vaisala specific design, which ensures accurate wind measurement from any horizontal wind direction without blind angles and corrupted readings.

    Barometric pressure, temperature, and humidity measurements are combined in the PTU module using capacitive measurement for each parameter. It is easy to change the module without any contact with the sensors.

    The Humicap® Humidity & Temperature Probe 6539B is designed for humidity and temperature measurements. It is very accurate, has excellent long-term stability and negligible hysteresis.

    The probe’s small diameter allows it to be used in applications with space restrictions, for example, shipping containers or between planks in timber drying kilns. It can also be used in conjunction with the Model 6704A Radiation Gill Screen & Mount in standalone situations.

  • Specifications

    Weather Transmitter 6501V-H

    Wind Speed
    Range: 0 – 60 m/s
    Response time: 250 ms
    Accuracy: 0 – 35 m/s: ±0.3 m/s or ±3%, whichever is greater
    Accuracy 35 m/s – 60 m/s: ±5%
    Output resolutions and units: 0.1 m/s, 0.1km/h, 0.1 mph, 0.1 knots

    Wind Direction
    Azimuth: 0 – 360°
    Response time: 250 ms
    Accuracy: ±3°

    Liquid precipitation
    Rainfall: cumulative accumulation after the latest automatic or manual reset output resolutions and units 0.01 mm, 0.001 inches
    Accuracy: 5%

    Air temperature
    Range: -52 … +60 °C (-60 … +140 °F)
    Accuracy for sensor at +20 °C: ±0.3 °C (±0.5 °F)

    Barometric pressure
    Range: 600 – 1100 hPa
    Accuracy: ±0.5 hPa at 0 – +30 °C (+32 – +86 °F); ±1 hPa at -52 – +60 °C (-60 – +140 °F)
    Output resolutions and units: 0.1 hPa, 10 Pa, 0.0001 bar; 0.1 mmHg, 0.01 inHg

    Diameter: 127mm
    Height: 240mm

    Operating temperature: -52 – +60 °C (-60 – +140 °F)
    Storage temperature: -60 – +70 °C (-76 – +158 °F)
    Operating voltage: 5 – 32 VDC
    Typical power consumption: 3 mA at 12 VDC (with defaults)
    Serial data interface: SDI-12, RS-232, RS-485, RS-422, USB connection
    Weight: 650 g (1.43 lb)
    Housing: IP65
    Housing with mounting kit: IP66

    Humicap® Humidity & Temperature Probe 6539B

    Range: 100% RH via Humicap H-sensor.
    Accuracy at 20°C: ±2%RH (0-90% RH); ±3%RH (0-100% RH)
    Temp. dependence: ±0.04%RH/°C
    Temperature: -40°C to 60°C
    Output Signal: 1 analog, 0-1VDC (R.H.) 1 analog, 0-1VDC (Temp)
    Cable: 4 core, 3.5 metres
    Power: 12VDC, 4mA
    Enclosure: ABS plastic, IP55
    Size (LxD): 235mm x 24mm
    Weight: 350g

  • Ordering Information

    6501V-HWeather Transmitter RS232/422/485 SDI-12 With Bird Spikes
    6501M-V-GAL-RWeather Transmitter Mount Adaptor for Round 50mm Galvanised Pipe
    6501M-V-TRIWeather Transmitter Mount Adaptor for Tripod
    6539BHumicap® humidity and temperature probe

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  • Documents

    6501V Weather Transmitter
    6539B Humidity and Temp probe

    Unidata Manual – 6501 6504 Weather Instruments
    Unidata Manual – 6539B Humidity & Temperature Probe (5V)

    Application Notes
    Air quality and dust monitoring
    Aquaculture monitoring
    Evaporation Monitoring
    Mine site environmental monitoring
    Rivers and Streams Monitoring
    Weather monitoring
    Remote transmission tower monitoring system

environmental monitoring weather transmitter 6501V
environmental monitoring Humicap humidity temperature probe 6539B