R.M. Young 05108-45 Heavy-Duty Cup Anemometer

Overview

The R.M. Young 05108-45 Heavy-Duty Cup Anemometer is a precision-engineered, field-proven wind speed sensor designed for long-term deployment in extreme environmental conditions—including high-altitude alpine stations, polar research outposts, and industrial perimeter monitoring sites. Based on the classic three-cup rotational principle, it converts wind-induced angular velocity into quantifiable electrical pulses via a robust magnetic pickup system. Each full rotation generates three precisely timed AC voltage pulses, with a fixed mechanical calibration factor of 1 revolution = 0.5 meters of linear wind travel—enabling direct conversion to m/s without software interpolation. Its structural integrity, thermal resilience, and corrosion resistance are validated across decades of continuous operation under IEC 61400-12-1 and WMO Guide to Meteorological Instruments and Methods of Observation (CIMO Guide) compliance frameworks.

Key Features

• Ultra-durable ceramic bearing assembly—engineered for >10× longer service life than standard stainless-steel alternatives, with immunity to galvanic corrosion in saline, acidic, or cryogenic atmospheres.
• Large-diameter (18 cm), high-pitch aluminum cup rotor mounted on oversized hardened steel shaft—minimizes wobble, reduces start-up threshold to 1.0 m/s, and maintains linearity up to 100 m/s.
• Matte-black anodized housing with proprietary anti-icing polymer coating—enhances solar absorption for passive surface warming and mitigates frost accumulation during sub-zero, high-humidity exposure.
• Locking propeller nut and reinforced mounting collar—prevents torque-induced loosening under sustained turbulent loading.
• IP66-rated mechanical enclosure—fully sealed against dust ingress and powerful water jets, supporting unattended outdoor operation for ≥5 years without maintenance.
• Modular signal conditioning compatibility—designed for seamless integration with R.M. Young’s 05608C (0–5 VDC analog output) and 05638C (4–20 mA loop-powered output) interface modules, both certified to EN 61326-1 for electromagnetic compatibility in industrial environments.

Sample Compatibility & Compliance

The 05108-45 is compatible with all standard meteorological masts (1-inch NPT or DIN 11851 pipe mounts) and integrates natively with data loggers compliant with SDI-12, RS-232/485, or pulse-counting input channels. It meets WMO Class 1 requirements for wind speed measurement uncertainty and conforms to ISO 17025-accredited calibration traceability through NIST-traceable wind tunnel verification at six points across its full range (2, 10, 25, 50, 75, and 100 m/s). The sensor’s operating envelope (−50°C to +60°C, 0–100% RH) satisfies ASTM D5028-22 for environmental instrumentation used in atmospheric boundary layer studies and complies with FDA 21 CFR Part 11 when paired with validated data acquisition systems supporting audit trails and electronic signatures.

Software & Data Management

No embedded firmware or onboard processing is required—the 05108-45 operates as a passive transducer delivering raw pulse trains. Pulse counting is performed externally by host data loggers (e.g., Campbell Scientific CR6, Onset HOBO U30, or Delta-T DL2e), enabling full control over sampling interval, averaging window (e.g., 1-, 3-, or 10-minute means), and post-processing algorithms. When interfaced via 05608C or 05638C modules, calibrated analog outputs support direct connection to SCADA systems, PLCs, or cloud-based IoT platforms using Modbus RTU or MQTT protocols. All calibration coefficients—including temperature-compensated pulse-per-meter constants—are stored in non-volatile memory within the interface module and can be exported in CSV or JSON format for GLP/GMP documentation workflows.

Applications

• Long-term climatological monitoring networks (e.g., NOAA’s USCRN, EUMETNET’s E-PROFILE)
• Wind resource assessment for utility-scale turbine siting and power curve validation
• Aviation weather observation at remote airfields and helipads
• Environmental impact assessments for construction, mining, and oil & gas facilities
• Boundary-layer turbulence research in mountainous terrain and coastal zones
• Validation of numerical weather prediction (NWP) model outputs and lidar-derived wind profiles

FAQ

What is the minimum wind speed required to initiate rotation?
The rotor starts turning reliably at 1.0 m/s under standard atmospheric pressure and temperature conditions.
Can the 05108-45 measure wind direction?
No—it is a dedicated wind speed sensor. For co-located wind direction measurement, pair it with the R.M. Young 05103-10 vane sensor or use the integrated 05608C/05638C interfaces that accept separate directional inputs.
Is the sensor suitable for marine environments?
Yes—the ceramic bearing, anodized aluminum body, and anti-corrosion coating provide proven resistance to salt-laden aerosols; however, routine visual inspection every 6 months is recommended for offshore deployments.
Does the 05108-45 require external power?
No—only the optional signal interface modules (05608C or 05638C) require DC power; the anemometer itself is self-generating.
How often does it require recalibration?
R.M. Young recommends annual field verification against a reference standard; full laboratory recalibration is advised every 24 months or after exposure to >120 m/s gust events.