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MetPak RG Weather Station MetPak RG Weather Station MetPak RG Weather Station MetPak RG Weather Station
Designed & manufactured in the UK

MetPak RG Weather Station

Product code: WSMETPAKRG

£ inc VAT  ex VAT)

The MetPak RG is supplied complete with a tipping bucket rain gauge adding to those parameters provided by MetPak at a very attractive price, while maintaining the reference quality measurement concept. The rain gauge is included as standard with an integrated unit, along with the base plate, 6 metres of cable and is calibrated to the MetPak RG ensuring excellent accuracy and data quality.


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The Kestrel 1000 pocket anemometer is the first and entry level of the Kestrel range, providing the user with accurate wind speed readings, it is the ideal model for windsurfers, kite surfers, model plane flyers and outdoor enthusiasts. It has three buttons below the display, making operation simple and allowing the user to view data in current, maximum or average displays, the buttons also allow operation of the data hold function.

The Kestrel 1000 is a small electronic rotating vane type anemometer (wind meter), easily carried in a pocket. It uses high precision Zytel® bearings and a light weight impeller to provide accurate air flow measurements even at low speeds. The impeller assembly can be replaced by the user if damaged.

Low power microprocessor technology is used to provide speed, maximum speed, average speed and units selection; functions normally only found on more expensive instruments. The liquid crystal display has large 9mm high digits for a clear readout.

Power is from an easily replaceable standard lithium coin cell battery, which will typically give up to 300 hours of operation. The instrument automatically switches off if no keys are pressed for 45 minutes.

The Kestrel 1000 wind meter is made from high impact injection moulded plastic and corrosion resistant materials with the electronics fully sealed. It will float if accidentally dropped into water. There is a hard cover for protection when not in use and a lanyard is provided for added security.

The MetPak RG weather station is capable of monitoring seven weather parameters:

» Precipitation
» Barometric pressure
» Air temperature
» Humidity
» Dew point
» Wind speed
» Wind direction

The design of the MetPak RG allows all measurements to be as accurate as possible without influencing other measured parameters yet provides a complete, compact, reference quality system. In addition to the rain gauge parameter the MetPak RG utilises the Gill WindSonic ultrasonic technology to measure wind speed and direction and a highly accurate barometric pressure sensor is housed within a vented enclosure. Temperature and humidity are measured using a Rotronic Hygroclip HC2-S3 temperature/humidity probe contained in a naturally aspirated radiation shield. The unit is especially suitable for harsh or marine environments.

The MetPak RG weather station is supplied with digital SDI-12, RS232 & 422 outputs.

The serial data output is ideal for interfacing with a WS-15A Display Unit.

Data from the MetPak RG can be stored using the SpaceLogger W10 (WindLogger) and SpaceLogger W8 Wireless data loggers providing a compact affordable logging solution for long term data collection.

Low power consumption enables this weather station instrument to be used in remote locations where power is at a premium.

An electrical junction box is fitted to the mounting bracket allowing convenient termination of all electrical cables.

The MetPak RG is also available as a base station with optional remote wind sensor.

MetPak RG with Integrated WindSonic and Rain Gauge

This variant of the MetPak RG features the same on-board sensors as the Base Station, with the addition of an integrated WindSonic ultrasonic wind sensor for wind speed and direction measurement, and tipping bucket rain gauge for precipitation measurement.

MetPak RG weather station benefits

» Compact unit
» Rain gauge positioned to ensure it does not influence other measurements
» Ultrasonic wind sensor with no moving parts
» Serial data output options
» Lightweight
» Easily pole mounted
» Low power consumption for remote monitoring

MetPak RG Weather Station measures

» Precipitation
» Wind speed
» Wind direction
» Air temperature
» Relative humidity
» Dew point
» Barometric pressure

Units of measure

» knots, m/s, km/h, mph, ft/min
» degrees
» °C or °F
» % RH
» hPa, mbar, mmHg, InHg

Accuracy

    » Wind Speed ±2% of reading @ 12m/s
    » Wind Direction ±3° @ 12 m/s
    » Air temperature ±0.1°C
    » Relative humidity ±0.8% @23°C
    » Barometric pressure ±0.5hPa

Range

» Speed 0.01 to 60 m/s (116 knots)
» Direction 0 to 359° (no dead band)
» Temperature -35°C to +70°C
» Relative humidity 0-100% RH
» Barometric pressure 600-1100hPa

Applications

» Golf Club Weather Monitoring & Club Safety
» HVAC & Building Automation Control
» Agricultural Weather Station
» Government & Emergency Management
» Education & Environmental Research
» Pollution Control
» Weather Forecasting
» Power and Smart Grid Solutions
» Sports & Recreation
» Environmental Observation
» Transport & Aviation
» Weather Monitoring
» Environmental monitoring
» Industrial controls
» Road Weather Stations
» Coastal Weather Stations

What does it output?

MetPak RG can be configured using the free MetView software provided to select the output rate and units of measurement that suit the application.

The MetPak RG automatically transmits a status code with each output to indicate the operating status of each of the sensors. This ensures accuracy and reliability.

The MetPak RG default serial output is as follows:

Setting Function
Comms Levels RS232
Baud Rate 19200
Data Connection Data Bits 8, Parity None, Stop Bits 1, Flow Control None
Output rate 1Hz
Message Mode Continuous
Message Format Wind Direction (degrees), Wind Speed (metres/Sec), Barometric Pressure (hecto pascals), Humidity (percent), Temperature (degrees C), Dew Point (degrees C), Power Supply (volts), Status Code (00) Checksum (hex number)
Output Sentence Comma Separated Variable
Node Address Q
Message terminator Carriage return and line feed
Power up message On

Example Data String:

<STX>,Q,DDD,SSS.SS,PPPP.P,HH.H,T.T,WW.W,VV.V,AA,<ETX>,CC<CR>,<LF>

Where
Q is the anemometer identifier. Can be set to any character Q to Z
DDD wind direction in degrees relative to sensor axis
SSS.SS wind speed
PPPP.P barometric pressure
HH.H relative humidity
T.T temperature
WW.W dew point
VV.V power supply voltage
AA status 00 ok, 01 anemometer axis 1 failed, 02 anemometer axis 2 failed, 04 anemometer axis 1 & 2 failed, 08 NVM error, 09 ROM error, 67 Temp/Humidity/Pressure or anemometer reading failed.
CC checksum Exclusive OR of all characters between <STX> and <ETX> as a two character hexadecimal value.
<STX> is the ASCII character with a value of 2
<ETX> is the ASCII character with a value of 3
<CR> is the ASCII carriage return character with a value of 13
<LF> is the ASCII line feed character with a value of 10

Details of other output options and configuration instructions are given in the user manual supplied with MetPak.

Configuring the MetPak RG

To change the setting of a MetPak weather station from the default factory settings, it is possible to communicate with the instrument direct from a PC.

MetPak RG can be configured using:

» A terminal program such as MS Windows HyperTerminal.
» MetSet Configuration Software: MetSet is a free software package that allows the user to configure the output and display data provided by the MetPak. The simple interface features a range of drop-down selection boxes, providing the ability to enable or disable existing sensors and adjust output rates.

MetView software

MetView software is also provided free with each weather station, offering a clear, intuitive display of the current weather conditions.

MetView features five gauges: Temperature, Humidity, Pressure, Wind Speed and Wind direction. There is also a digital readout of Dew Point.

How Ultrasonic Wind Sensors Work

The WindSonic sensor uses the time of flight method of air velocity measurement.

There are four ultrasonic transducers arranged as two pairs at right angles to each other. Each pair is used to measure the component of the wind in the direction between the transducers.

For example if one pair is on a North South line and the other pair is on an East West line then the North South component VN and the East West component VE are measured. These are then combined to give the actual wind speed and direction.

Wind angle  A = arctan ( VE / VN )

Wind speed  S = sqroot ( VE 2 + VN 2 )

To look at how the component measurements are done we will take the example of the North South transducer pair:

A pulse of ultrasonic sound is transmitted by the North transducer and the time T1 it takes to travel to the South transducer is accurately measured. The time T2 is then measured for an ultrasonic pulse to travel in the opposite direction from the South transducer to the North transducer. These times are affected by the wind blowing along the line between the transducers. For example if there is some wind blowing from a Northerly direction, then the time taken for the ultrasonic pulse to travel from N to S will be shorter than from S to N.

The time for the pulse to travel from N to S is given by

T1 = L / ( C + VN )

and the time for the pulse to travel from N to S is given by

T2 = L / ( C - VN )

where
L is the distance between the transducers and
C the speed of sound

From this the northerly component of the wind can be found from

VN = L ( 1/T1 - 1/T2 ) / 2

and the speed of sound from

C = L ( 1/T1 + 1/T2 ) / 2

Case Study
Our following Case Studies give an overview of how this product applies to different sectors.
Please click on the title below to read the full case study.

Agriculture
Aviation
Construction
Education
Emergency Services
Environmental Monitoring (with SpaceLogger Data Loggers)
Environmental Monitoring (with Wind Systems)
Health & Safety Monitoring
Marine, Ships & Harbours
Outdoor Sports
Research
Tower Cranes
Transport Safety
Weather

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