020C Wind Direction Sensor

The 020C Wind Direction Sensor provides azimuth data for use in micrometeorological measurements related to operational studies and research. The lightweight airfoil vane is directly coupled to a single precision potentiometer. These sensors are especially useful when a low starting threshold, a high damping ratio, or a short delay distance is required.

Both wind speed and wind direction sensors are used in environments ranging from Antarctic cold to arid desert. The 01OC, 010C-1 and 020C instruments meet USEPA and NRC specifications for critical measurement applications.

Features

  • Low starting threshold
  • Internal heater for long bearing life
  • Low profile to minimize “sensor turbulence”
  • High damping ratio
  • Short delay distance
  • Quick-disconnect connector
  • Field-replaceable electronic components
  • Ingress Protection Level 65 (IP65)

Reliability

The 010C and 020C are made of stainless steel and anodized aluminum components and are functionally more reliable than any other sensors of their kind:

  • Built-in electrical field surge protection greatly reduces problems associated with static fields, near-miss lightning hits and poor grounding systems
  • Inclusion of Met One Instruments’ internal heater (AC use only) provides positive clean aspiration through the bearings, thereby greatly increasing sensor bearing life
  • Optional, external de-icing heater sleeve for applications where freezing rain, ice and low wind speeds may be encountered

Specifications

Performance Characteristics
Azimuth: Electrical 0° -357°
Mechanical 0° -360°
Threshold: 0.5 mph (0.22 m/s)
Linearity: ±1/2% of full scale
Accuracy: ±3° Resolution < 0.1 °
Damping Ratio: Standard 0.6 (magnesium tail) (meets EPA specifications)
Delay Distance: Less than 3 It (91 cm)
Temperature Range: -50°C to +65°C (-58°F to +149°F
Electrical Characteristics
Power Requirements: 12 VDC at 10 mA, 12 VDC at 350 mA for internal heater
Output Signal: a. 0 -5 V for 0° -360°
b. 0 -2.5 V for 0° -360°
Output Impedance: 100 Ω maximum
Physical Characteristics
Weight: 1.5 Ibs (.68 kg)
Finish: Clear anodized aluminum
Cable & Mounting
PN 1957 Cable Assembly; specify length in feet or meters
Mounting: PN 191 Crossarm Assembly
Alternate Wind Sensors
020C-1 Damping Ratio: 0.25 (aluminum tail)
Technical Drawing
 

Specifications are subject to change at any time