Schelt Technology

HD53LS is a 2-axis ultrasonic static anemometer for measuring:

• Wind speed and direction, U-V Cartesian components of wind speed.
• Wind Gust (only in version with RS485 MODBUS-RTU output).

The average of wind speed and direction over a period configurable up to 10 minutes is calculated.

Two versions are available:

• HD53LS.A: with two analog outputs (one for wind speed and one for wind direction), factory configurable among 4…20 mA (standard), 0…1 V, 0…5 V, 0…10 V (to be specified when ordering).
• HD53LS.S: with RS485 MODBUS-RTU output.

Advantages of the HD53LS series:

• The absence of moving parts minimizes maintenance.
• High sensitivity for detecting very low speeds, which are not detectable by traditional methods.
• Fast and easy installation (on ∅ 40 mm mast, optional tripod available).
• The low power of the instrument allows installation in remote sites, with power from solar panel and battery.
• The version with RS485 MODBUS-RTU output allows instrument networking.

The instruments of the series HD52.3D… are 2 axes ultrasonic static anemometers for measuring

• Wind speed and direction, U-V Cartesian components of wind speed
• Wind Gust – Measurement available only with MODBUS-RTU and SDI-12 protocols
• Relative Humidity and Temperature (optional),
• Global Solar Radiation (optional)
• Barometric pressure (optional)
• Rainfall (optional)

The “Rainfall” and “Global solar radiation” options are alternatives (they can not be both present in the same instrument).

All models are equipped with a magnetic compass.

The avarage of wind speed and direction over a period configurable up to 10 mins is calculated.

RS232, RS485, RS422 and SDI-12 serial interfaces are available with NMEA, MODBUS-RTU and SDI-12 communication protocols. All versions have two analog outputs, both for wind speed and for direction, factory configurable among 4÷20mA (standard), 0÷1V, 0÷5V, 0÷10V (to be specified when ordering).

Advantages:

• The absence of moving parts minimizes maintenance;
• High sensitivity for detecting very low speeds, which are not detectable by traditional methods;
• The low power of the instrument allows installation in remote sites, with power from solar panel and battery;
• The heating option ‘R’ prevents the accumulation of snow and ice from forming, allowing accurate measurements in all environmental conditions;
• Fast and easy installation, alignment facilitated by built-in compass;
• The available measurement options join together in one single, compact and lightweight instrument, the main variables of interest in weather stations;
• MODBUS-RTU output allows instrument networking.

HD2003 is a 3-axis static anemometer for measuring wind speed and direction, U-V-W cartesian components of speed, wind gust, sound speed, sonic temperature, air temperature, relative humidity and barometric pressure.

Main characteristics:

• 5 analogue voltage or current outputs, with different measuring ranges.
• RS232 and Multidrop RS485 Serial Communication interfaces.
• Configurable output rate of digital output data string.
• Configurable average periods 1÷60 s and 1÷60 min. for all output quantities.
• Processing algorithms and validation of the raw measurement signals to provide a measure of greatness anemometer with ± 1%.
• Digital high frequency data acquisition mode with 50Hz data output.
• Self diagnostics with error checking and report.
• Reliability and accuracy throughout the measuring range without further calibration.
• Flexible, easy-to use demo software, configurable according to the user’s needs through Computer interface.
• User interface for managing the setup and software upgrade via RS232 or RS485.
• Compass magneto sensor for automatic alignment to magnetic north.
• No moving parts, maintenance costs and reduced service.
• Robust construction, suitable to operate continuously in harsh conditions.
• Low power consumption.

Available as well with heating option (HD2003R): built-in heating device of sonic transducers, to prevent ice and snow formation. Assures correct measurements even in presence of sleet or snow.

Please note that this code as well as the same version with heating option (HD2003.1R) have been discontinued.

Manual and datasheet are still available in the download tab.

The version with additional measurement of temperature, relative humidity and atmospheric pressure is still available. See product code HD2003.

If you are looking for our new 3 axis ultrasonic anemometer, please refer to the new AELOUS-3 series.

The family of transmitters series HD29… are employed in the control of air speed in the air conditioning and ventilation (HVAC / BEMS) in the pharmaceutical, museum, clean rooms, ventilation ducts, industrial sectors and households, crowded places, cafeterias, auditoriums, gymnasiums or on farms with large numbers of animals.

The sensors in combination with an accurate electronics guarantee precise and reliable measurements in the time.

The sensor for the air speed is thin film, the probe sheath is AISI304, the filter relative humidity of 20μ wire mesh, materials that allow the use in hostile areas.

There are two possible installations: in the TO version, the horizontal probe is joined to the electronics enclosure while in the TC version the probe is conconnected to the electronics through a cable. In the TO version, the duct probe is fixed to the electronics enclosure and it is available in three different lengths. To fix the probe to the duct, you can use, for example, the HD9008.31 flange, a 3/8” universal biconical connection or a PG16 metal cable gland (∅10…14mm). In the TC version, the probe together with the sensors is equipped with a cable which can be 2, 5 or 10 meters long.

The probes are available in different lengths.

Possibilities of the several models:

– Air speed measurement with the HD2903T… and HD29V3T… series – analog output 4-20mA or 0-10VDC

– Air speed and Temperature measurement with the HD2937T… and HD29V37T… series – analog outputs 4-20mA or 0-10 Vdc

– Air speed, Humidity and Temperature measurement with the HD29371… series and HD29V371T – analog outputs 4-20mA or 0-10 Vdc