R.M. Young · Weather instruments
Weather instruments from R.M. Young
Distributor for R.M. Young in SwedenBesides wind sensors, R.M. Young makes instruments for pressure, temperature, humidity, precipitation and snow depth, and radiation shields for temperature and humidity probes. We build them into weather stations together with Campbell Scientific data loggers.
The instruments
A selection from the range. Get in touch if you are looking for something that is not listed here.
Pressure
Barometer 61402
500–1100 hPa with an accuracy of 0.2 hPa at 25 °C and 0.3 hPa between −40 and +60 °C.
- 61402V: voltage output and RS-232.
- 61402L: 4–20 mA, RS-232, RS-485 and SDI-12.
Temperature
Temperature Probe 41342
A 1000 Ω platinum probe with an accuracy of ±0.3 °C at 23 °C.
- ±0.1 °C as an option, with calibration.
- Four-wire, 0–1 V or 4–20 mA.
Humidity and temperature
Relative Humidity/Temperature Probe 41382
Relative humidity 0–100% with an accuracy of ±1% at 23 °C, and temperature.
- 0–1 V or 4–20 mA.
- Fits directly in the 43502 radiation shield.
Radiation shield
Multi-Plate Radiation Shield 41003
A naturally ventilated shield with white plates, for temperature and humidity probes.
- Clamps to a pipe of 25–50 mm diameter.
- Adapters for probes up to 26 mm.
Radiation shield
Aspirated Radiation Shield 43502
A fan draws air past the probe, for high accuracy even in calm conditions.
- Radiation error 0.2 °C at 1000 W/m² according to R.M. Young.
- Power 12–14 V, 500 mA.
Precipitation
Tipping bucket gauges 52203 and 52202H
Tipping bucket rain gauges with a 200 cm² catchment area and 0.1 mm per tip.
- ±2% up to 25 mm/h.
- The 52202H is heated and runs from 230 V mains.
Precipitation
Precipitation gauges 50203 and 50202H
Gauges with no moving parts that empty by siphon, suited to buoys and ships.
- 0–5 V output for 0–50 mm.
- The 50202H is heated.
Snow depth
SNOdar 54000
A snow depth sensor that measures with a laser, from 0.09 to 9 metres.
- ±1 cm up to 2 m.
- RS-232, SDI-12 and Bluetooth.
All-in-one weather sensor
ResponseONE-Pro 93000
Ultrasonic wind, temperature, humidity and pressure in one sensor, with an input for a rain gauge.
- RS-232, RS-485 and SDI-12.
- The sensor module can be replaced in the field.
R.M. Young also makes wind displays for control rooms and ships’ bridges, the Wind Tracker 06201 and the marine 06206. They show wind speed, gust and direction and have alarm relays.
Naturally ventilated or fan-aspirated radiation shield?
A radiation shield screens the temperature probe from the sun. In a naturally ventilated shield the error depends on the wind. For the 41003, R.M. Young states a radiation error of 0.4 °C at 3 m/s, 0.7 °C at 2 m/s and 1.5 °C at 1 m/s, at a solar radiation of 1080 W/m².
The fan-aspirated 43502 draws air past the probe at 5–11 m/s, depending on the probe. According to R.M. Young the radiation error is 0.2 °C at 1000 W/m². We choose it when requirements are high, when winds are often light and when the temperature difference between two heights is to be measured.
The fan needs power around the clock. The shield has a tachometer output, so the logger can raise an alarm if the fan stops.
- 41003Naturally ventilated. Needs no power.
- 43502Fan-aspirated. 12–14 V, 500 mA.
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 weather instruments
Do we need a fan-aspirated radiation shield?
Not always. A naturally ventilated shield is enough for most weather stations. We choose a fan-aspirated one when the requirements on the temperature measurement are high and there is power for the fan.
Does the rain gauge work in winter?
The heated tipping bucket gauge 52202H melts snow and ice in the funnel and is made for temperatures down to −20 °C. It needs mains power.
Can the barometer be mounted outdoors?
Yes, in a weatherproof enclosure. R.M. Young also recommends a pressure port that reduces the effect of wind on the measurement.
Do the instruments work with a Campbell Scientific data logger?
Yes. We connect them analogue, serial or via SDI-12 and write the program.
Would you like a quote for R.M. Young instruments?
Tell us what the station will measure, and we will suggest instruments and wiring.