Campbell Scientific CR800 and CR850 Measurement and Control Systems - Manual (Page 38)

Section 4. Quickstart Tutorial
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Figure 5: Half-bridge wiring -- wind vane potentiometer
Figure 6: Full-bridge wiring -- pressure transducer
4.1.3.3 Pulse Sensors
Pulse sensors are measured on CR800 pulse-measurement channels. The output
signal generated by a pulse sensor is a series of voltage waves. The sensor
couples its output signal to the measured phenomenon by modulating wave
frequency. The CR800 detects each wave as the wave transitions between voltage
extremes (high to low or low to high). This is termed “state transition”.
Measurements are processed and presented as counts, frequency, or timing data.