Senseca HD51.3D Series High-Performance Two-Axis Ultrasonic Anemometer

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Description

The Senseca HD51.3D Series is a range of high-performance two-axis static ultrasonic anemometers designed for accurate wind measurement across a wide variety of environmental and industrial conditions.

Depending on the selected configuration, the instruments can measure wind speed up to 85 m/s, wind direction, U-V Cartesian components of wind speed, and Wind Gust. Optional integrated measurements include relative humidity and temperature, global solar radiation, and atmospheric pressure.

All available configurations can also be supplied with an integrated heating system, supporting reliable operation at low temperatures and under conditions where snow or ice may form.

For particularly demanding and aggressive environments, the HD51.3DR-AL model is available. It measures wind speed up to 80 m/s, wind direction, U-V Cartesian components, and Wind Gust. The HD51.3D4R-AL version also includes atmospheric pressure measurement.

The HD51.3DR-AL version features an upgraded heating system for rapid defrosting and a housing made from anodized aluminum alloy with an anti-corrosion coating, making it suitable for use in highly aggressive environments. The model complies with MIL-STD-810G Method 509.6 for salt-spray corrosion resistance testing.

Its high immunity to electromagnetic interference also makes the series suitable for measurements in electrically noisy environments.

All models are equipped with RS232, RS485, and RS422 serial communication interfaces and support NMEA, MODBUS-RTU, and proprietary ASCII communication protocols.

The instruments also provide two analog outputs for wind speed and wind direction, factory configurable as 4–20 mA (standard), 0–1 V, 0–5 V, or 0–10 V.

The operating temperature range is -40 to +70 °C. Instrument power supply is 12–30 V DC, while the heating system requires 24 V DC.

The Senseca HD51.3D Series is suitable for automatic weather stations, wind monitoring, industrial and infrastructure applications, remote monitoring sites, and environments exposed to severe weather or electromagnetic interference.

For more information:
HD51.3D... – High Performance Two Axes Ultrasonic Anemometer - Air and Wind Speed, Weather Station - Senseca

Specifications

Parameter	Value
Wind Speed Measurement – Principle	Ultrasonic
Wind Speed Measuring Range – -AL Versions	0–80 m/s
Wind Speed Measuring Range – Versions without T/RH	0–85 m/s
Wind Speed Measuring Range – Versions with T/RH	0–75 m/s
Wind Speed Resolution	0.01 m/s
Wind Speed Accuracy	±0.2 m/s or ±2% of reading, whichever is greater, from 0–65 m/s; ±3% of reading above 65 m/s
Wind Direction Measurement – Principle	Ultrasonic
Wind Direction Range	0–359.9°
Extended Wind Direction Range	0–539.9°, configurable to prevent analog output oscillation around 0°
Wind Direction Resolution	0.1°
Wind Direction Accuracy	±2° RMSE at wind speeds >2 m/s
Barometric Pressure – Option 4	Piezoresistive sensor
Barometric Pressure Range	300–1100 hPa
Barometric Pressure Resolution	0.1 hPa
Barometric Pressure Accuracy	±0.5 hPa from 700–1100 hPa at 20 °C; ±1 hPa from 500–1100 hPa; ±1.5 hPa from 300–500 hPa at T = 0–60 °C
Compass and Tilt Angles – Option A	Available
Compass / Tilt Resolution	0.05°
Compass / Tilt Accuracy	±1°
Heating – Option R	Available; standard on -AL models
Heater Supply Voltage	24 V DC ±10%
Heater Power Consumption	20 W; 93 W for -AL versions
Temperature – Option 17	Pt100 sensor, for technopolymer models only
Temperature Range	-40 to +70 °C
Temperature Resolution	0.1 °C
Temperature Accuracy	±0.15 °C ±0.1% of reading
Relative Humidity – Option 17	Capacitive sensor, for technopolymer models only
Relative Humidity Range	0–100% RH
Relative Humidity Resolution	0.1% RH
RH Accuracy at T = 15–35 °C	±1.5% RH from 0–90% RH; ±2% RH over the remaining range
RH Accuracy at T = -40 to +70 °C	±(1.5 + 1.5% of reading) % RH
Global Solar Radiation – Option P	Thermopile sensor, for technopolymer models only
Solar Radiation Range	0–2000 W/m²
Solar Radiation Resolution	1 W/m²
Solar Radiation Classification	Spectrally Flat Class C according to ISO 9060:2018
Instrument Supply Voltage, Excluding Heater	12–30 V DC
Supply Voltage for 0–10 V Analog Output	15–30 V DC
Current Consumption, Excluding Heater	60 mA at 24 V DC
Serial Communication Interfaces	Galvanically isolated RS232, RS485, and RS422
Communication Protocols	NMEA, MODBUS-RTU, proprietary ASCII protocol
Analog Outputs	2 analog outputs for wind speed and direction or U-V Cartesian velocity components
Analog Output Types	4–20 mA standard; 0–1 V, 0–5 V, or 0–10 V on request
Analog Output Update Rate	4 Hz
Analog Output Isolation	Isolated from the power supply
Measurement Interval	250 ms to 1 s
Wind Speed Averaging Interval	Configurable from 1 s to 10 min
Wind Gust Calculation Interval	Configurable from 1 s to 10 min
Electrical Connection	19-pole M23 male connector
Operating Temperature Range	-40 to +70 °C; -50 to +70 °C for -AL models
Protection Rating	IP66
Corrosion Resistance Test	MIL-STD-810G Method 509.6 – 48 h exposure + 48 h drying; EN ISO 9227:2017
Anti-Icing / Freezing Rain Test – -AL Models	MIL-STD-810F Method 521.2
Vibration Resistance Test – -AL Models	EN 60945:2002 Sect. 8.7; EN 60068-2-6:2008; IEC 60068-2-6:2007
Maximum Wind Speed Without Damage	90 m/s; 100 m/s for -AL models
Weight – Versions without T/RH	Approx. 640 g
Weight – Versions with T/RH	Approx. 1 kg
Weight – -AL Models	Approx. 1.4 kg
Housing – Standard Versions	ASA with aluminum and AISI 316 metal parts
Housing – -AL Models	Anodized aluminum alloy and AISI 316
Mast Installation	For mast with Ø40 mm outer diameter and Ø36 mm inner diameter