R.M. Young · Wind sensors
Ultrasonic anemometers from R.M. Young
Distributor for R.M. Young in SwedenR.M. Young’s ultrasonic anemometers measure the wind with no moving parts. The 86000 series measures in two dimensions and is available heated and for marine use, the 81000 measures in three dimensions and the ResponseONE is a compact sensor for smaller stations.
The models
According to R.M. Young, the sensors in the 86000 and 81000 series are tested and calibrated in a wind tunnel.
2D ultrasonic
Ultrasonic Anemometer 86000
An all-round sensor for wind speed and direction.
- 0–75 m/s, ±2% or 0.1 m/s up to 30 m/s.
- Serial or analogue output. The 86000-SDI has SDI-12.
Heated
Ultrasonic Anemometer 86004
With thermostatically controlled heating in the transducers and housing, for sites with ice and snow.
- 0–70 m/s.
- Powered from 24 V. The heater is 60 W.
Marine
Ultrasonic Anemometer 86106
The 86000 preset for NMEA, for ships and harbours.
- NMEA as standard, other formats can be selected.
3D ultrasonic
3D Ultrasonic Anemometer 81000
Wind in three dimensions and sonic temperature, for turbulence and research.
- 0–40 m/s, 4–32 readings per second.
- Available with an extended mast (81000RE) and with analogue inputs (81000V).
Compact
ResponseONE 91000
A small, light ultrasonic sensor with low power consumption.
- 0–70 m/s, 0.36 kg, IP66.
- RS-232, RS-485 and SDI-12. The 91500 has a built-in compass.
All-in-one weather sensor
ResponseONE-Pro 93000
Ultrasonic wind, temperature, humidity and pressure in one sensor.
- RS-232, RS-485 and SDI-12.
- Input for a rain gauge.
Compare the models
The main differences at a glance.
| 86000 | 86004 | 81000 | ResponseONE 91000 | |
|---|---|---|---|---|
| Measures | Wind in two dimensions | Wind in two dimensions | Wind in three dimensions and sonic temperature | Wind in two dimensions |
| Wind speed | 0–75 m/s | 0–70 m/s | 0–40 m/s | 0–70 m/s |
| Accuracy up to 30 m/s | ±2% or 0.1 m/s | ±2% or 0.1 m/s | ±1% ±0.05 m/s | ±2% or 0.3 m/s |
| Accuracy, direction | ±2° | ±2° | ±2° | ±2° |
| Heating | No | Yes, thermostatically controlled | No | No |
| Outputs | RS-232 or RS-485, 0–5 V or 4–20 mA | RS-232 or RS-485, 0–5 V or 4–20 mA | RS-232 or RS-485 and four voltage outputs | RS-232, RS-485/422 and SDI-12 |
| Power | 10–30 V | 24 V, 2.5 A | 12–24 V | 10–30 V |
| Operating temperature | −40 to +60 °C | −40 to +60 °C | −50 to +50 °C | −40 to +60 °C |
Swipe sideways to see the whole table. Simplified figures. Full specifications and manuals are available from R.M. Young ↗.
Outputs and wiring
The sensors in the 86000 series have a serial output, RS-232 or RS-485, with ASCII, NMEA or R.M. Young’s own format, and an analogue output of 0–5 V or 4–20 mA. Not all outputs can be used at once. The 86000-SDI and 86004-SDI versions have SDI-12 instead. In the 86000-SDI this keeps power consumption down.
We connect the sensors to Campbell Scientific data loggers or directly to your system, and set up format and measurement interval before delivery.
Suited to
Weather stations
Wind measurement with no moving parts, with SDI-12 or serial output to the logger.
Mountains and coasts
The heated 86004 for sites where ice and wet snow would otherwise build up on the sensor.
Harbours and ships
The 86106 is preset for NMEA, and the ResponseONE 91500 has a built-in compass.
Research
The 81000 measures wind in three dimensions and sonic temperature at up to 32 readings per second.
What we do
Choice and quote
We help you choose model, output and cable and send you a quote.
Wiring
The instrument is connected to a Campbell Scientific data logger or directly to your system.
Installation
Mounting, alignment and commissioning on site, on a mast, roof or quay.
Service
Checks, spare parts and replacement of wearing parts, with a short path to the person who built the station.
Frequently asked questions about the ultrasonic anemometers
When is heating needed?
Where ice and wet snow can build up on the sensor, for example in the mountains and on the coast in winter. The 86004 has a thermostatically controlled 60 W heater and is powered from 24 V, so the power supply has to be planned accordingly.
Two or three dimensions?
Two dimensions are enough for ordinary wind measurement. Three dimensions are needed when the vertical wind is to be measured as well, for example for turbulence.
Can the sensor be connected to our data logger?
Yes. All have a serial output, the 86000 and 81000 series also have analogue outputs, and several models are available with SDI-12. We wire them and write the program.
Do you have ultrasonic anemometers from other manufacturers?
Yes, from Gill Instruments as well. We suggest the sensor that suits the site and the task best.
More from R.M. Young
Would you like a quote for an ultrasonic anemometer?
Tell us where the sensor will be and how it will be connected, and we will suggest a model.