Sleek, yet unobtrusive, the appearance of the WeatherHawk Model 620/621 belies its rugged, durable quality and steady reliability. Having nine solid state sensors and being free of moving parts, this wireless weather station offers high reliability and maximum performance paired with longer intervals between normal service or maintenance. Its sleek profile suits the WeatherHawk 620/621 well for locations where low visual impact is an important consideration; plus, it makes the weather station base unit less vulnerable to wind-blown debris.

For locations where ice or snow is a part of winter weather, the WeatherHawk 621 incorporates a heater in the sensor assembly, assuring continued performance of your wireless weather system all winter long. The thermostatically controlled heater in the version 621 keeps the sensor head’s wind sensor elements and precipitation sensor surface snow- and ice-free at temperatures down to -50°C.

First Class Weather Sensors

What makes the WeatherHawk 620/621 so remarkable in the world of wireless weather stations is the full array of integrated weather sensors. With a solar radiation-shielded sensor assembly performing eight standard functions for the collection of weather data, the list of versatile uses for the WeatherHawk 620/621 is impressive: optimization of utility resources for home automation, environmental or agricultural research, integrated pest management (IPM), industrial applications, and any other setting where high reliability with a low visual profile is more desirable. And, the WeatherHawk 620/621 wireless weather system will calculate and export evapotranspiration (ET) values to third party systems for the management of irrigation resources, saving water and energy. Read below for the WeatherHawk 620/621’s list of sensors and specification to see what this system will do for you:

1. Wind Speed and Direction, now captured through sonic technology, are determined by an array of four ultrasound sensors integrated as one, which measure both wind components cyclically in all directions and calculate speed and direction for real-time values;

• While wind speed registers from 0 to 134 mph, accuracy is seen at ± .67 mph (± 0.3 m/s), or ± 3% for 0 to 78 mph, then at ±5% for speeds over 78 mph (35 m/s).

• Wind direction is found within 0 to 359.9° with accuracy expected at ±3°.

2. Air Temperature, while being measured by a radiation-shielded NTC resister, is found when the resistance value of the sensor changes with the temperature;

• For the range of -58°F to 140°F (-50°C to 60°C): air temperature sensing shows accuracy of ±0.36°F (0.2°C) for -4 to 122°F, then shows ±0.9°F when under -4°F and over 122°F, all at a resolution of 0.1°F (0.1°C).

3. Rainfall and Snowfall are measured by the same radar technology: a sensor for precipitation uses Doppler radar to gauge the quantity and type of precipitation from the size and speed of the drops;

• All precipitation of either type measures with a repeatability at over 90%, and resolution of 0.001 in. or 0.01 mm.

4. Relative Humidity is registered and measured by a capacitive humidity sensor which is housed in a vented solar radiation shield;

• Relative humidity (RH) measures from 0% to 100% at an accuracy of ±2%, with resolution at 0.1%.

5. Barometric Pressure is found and measured by a capacitive silicon strain gauge that resists being degraded by environmental exposure, and operates calibration-free from its manufacture date;

• In the range of 8.86 to 35.44 in. Hg (30-120 kPa), barometric pressure is measured with an accuracy of ±.01 in. Hg (±.05 kPa).

6. Solar Radiation, being essential information for determining evapotranspiration rate, is seen and measured by a silicon pyranometer having a cut filter that limits exposure to the 300-1100 nm wavelength range of the spectrum;

• While solar radiation is sensed in the range of 0 to 2000 W/m2, accuracy is expected at ±5% in the range of 300 to 1100 nm.

Both the humidity and air temperature sensors are housed in a vented, mechanically aspirated shield to allow maximum air circulation around the sensors.

With the newest weather sensors of industrial and scientific grade, the WeatherHawk 620/621 wireless weather system stands ready to serve your professional weather monitoring needs.

A Three-Part System

Whether you choose the WeatherHawk Model 620 or Model 621, your wireless weather system will require three key components:

• A WeatherHawk 620 wireless weather station base unit, or a WeatherHawk 621 wireless weather station base unit with heated sensor head, and the accompanying radio transceiver;

• A power supply for recharging the station base’s internal battery pack and providing the power needed to operate all weather station functions in the WeatherHawk 620; or an AC power converter for the WeatherHawk 621;

• The WeatherHawk system software best suited for your weather data collection needs.

With the WeatherHawk 620 or 621, you will receive the weather station base unit with its 916 MHz spread-spectrum radio, a fully integrated industrial grade transceiver, and an omni (diapole) antenna, as well as the base unit receiver for your computer’s wireless connection. An RS232 serial data I/O port is also installed in the bottom of the station base unit. As a useful bonus, the serial data port offers an extra serial communications port; or, you may use it for programming or testing the system. Alternately, it may be used for research work when direct data downloads are made to a PC. The weather station base unit includes an AC power supply (120 VAC/60 Hz) as standard equipment, too. And, for those applications where a 916 MHz radio will conflict with existing radio frequencies (RFs), the radio component can optionally be replaced with one of a different RF component at your request.

For a reliable power supply that will keep your WeatherHawk 620 wireless weather station operating free of interruptions all year, your system will require the 5-Watt Solar Panel Kit. The 5-Watt Solar Panel will continuously recharge the base unit’s internal battery pack. The location where your WeatherHawk weather station is set up will further determine the power supply needs: if your system will serve you in a location north of 40° Latitude, more power will be needed to keep the station operating continuously during shorter solar days and colder winter months. In these cases, add the External Battery Kit: the 12 VDC 7Ahr battery pack can supply all the power needed by the WeatherHawk 620, as it is designed to operate free of recharging for three months.

If your WeatherHawk wireless weather station will operate in a location that receives snow, ice, and below-freezing temperatures during winter months, choose the WeatherHawk 621, which relies on a direct power supply (by means of a WeatherHawk AC power converter included with the station base unit, or a 24 VDC 2 Ahr-powered connection) to run the thermostatically controlled, sensor head heater. Because direct electrical connection supplies all the power needed by the WeatherHawk 621, additional power sources are not necessary.

The third component your WeatherHawk 620/621 system needs for operation, the computer software, presents in three options. For personal or education applications, WeatherHawk PRO works with one computer and one weather station site, while the professional-use software, Visual WeatherHawk, will manage multiple weather station sites from one computer. The third software, LoggerNet, offers a data logging application for IBM-compatible computers that will manage multiple weather stations on a single host computer with the use of a Campbell Scientific, Inc. data logger. LoggerNet is needed in professional data logging applications where a variety of export file formats and computer-generated reports take place; it can also adapt to whatever data telemetry scheme your work requires. And, although WeatherHawk systems communicate with a proprietary Pakbus protocol, you may order a system with an optional MODBUS protocol if your work requires it. Please fill out our Special Order Request form, and tell us your requirements.

Read on for more information on WeatherHawk software applications, and the use of an IP module to expand data collection and sharing. Any of the WeatherHawk software applications can be ordered with a WeatherHawk 620/621; however, for LoggerNet, you will need to fill out our Special Order Request form and describe your system requirements.

With the expansion of uses for an Ethernet connection, uses for your WeatherHawk wireless weather station’s data collection also multiply. From giving you a weather data connection with a smart-phone app, to sending data to a network of users, the WeatherHawk IP Server Module supplies you with more options for your weather station’s valuable data. The IP Server Module will interface the serial output of your WeatherHawk 620/621 and an Ethernet. When the IP Server Module is connected to your station base unit’s serial output, it establishes an IP address outside the host computer’s firewall. Then, a web site for your weather station’s data can be created, and any user on your network can access real-time weather data for the micro-climate in that data collection site. Three output formats, HTML, XML, and CSV with headers, are operated by the IP Server Module for flexibility in output requirements. And, for easy convenience for iPhone users, an iPhone app is available that allows you to view your own real-time weather anytime, anywhere you are.

For the widest range of applications in a low visual profile and durable weather station, choose the WeatherHawk 620 Wireless Weather Station, or for optimal performance in freezing weather climates choose the OPTION, WeatherHawk Model 621 Wireless Weather Station.

WeatherHawk Wireless Weather Station Model 620

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Model WH620

WeatherHawk Wireless Weather Station Model 621 with Heated Sensor Head

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Model WH621