Radar II and III- Ground Speed Sensors
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RADAR II AND III Ground Speed Sensors Accurate and powerful ground speed sensors. Measuring ground speed has never been easier than with DICKEY-john® high-performance ground speed sensors. Accurate speed sensing enables you to achieving top performance from your electronic monitoring and controlling products. An incorrect speed signal can potentially provide substantial errors in speed and distance measurement, chemical and fertilizer application and yield calculations. All of that can lead to expensive mis-applications, crop damage, reduced yields. The DICKEY-john Radar II delivers the truest velocity measurement at mounting heights over 96 inches (243.8 cm). The high-performance, top-of-the-line Radar III ground speed sensor is a streamlined, more compact version of DICKEY-john’s best-selling Radar II model. The true ground speed sensors calculate speed independently of wheel motion using a microwave (radar) signal and the principle of Doppler shift (measuring the changes in the frequency of the reflected signal). Because they don’t use the movement of a wheel or drive shaft, errors in signal due to wheel slippage or wheel distortion from varying loads and ground conditions are eliminated. The DICKEY-john® radars may also be used to improve the performance of other monitors and control systems that require a speed sensor signal. Features and Benefits: • Views ground surface for accurate ground speed detection • elocity errors of less than or equal to 1% from .3 - 44 mph (.53-70.8 km/h) V after field calibration • High impact, chemical and weather resistant plastic housing • asy to install E • ounts to view forward or backward from the vehicle M • Radar II mounting heights 18 - 96 inches (45.7 - 243.8 cm) • adar III mounting heights 18 - 48 inches (45.7 - 121.9 cm) R

RADAR II AND III Ground Speed Sensors Specifications Velocity Range • .33 - 44 mph (.53 - 70.8 km/h)for 44 Hz/mph output frequency • .26 - 44 mph (.42 - 70.8 km/h) for 59 Hz/mph output frequency Accuracy True Velocity errors of: • ≤ ± 3% .33 - 2 mph (.53 - 3.2 km/h) • ± 1% 2 - 67 mph (3.2 - 70.8 km/h) ≤ (Based on in-field system calibration) Output Stage Characteristics • Transient/short protected NPN transistor • ZOH (High level output source impedance) • ZOL (Low level output sink impedance) • ZOH ~ 1051 ohms • ZOL ~ 63 ohms Microwave Frequency • 24.125 GHz ± 50 MHz Response, Output Speed...