Decagon Devices VP-4 Operator's Manual page 7

2 ABOUT VP-4
Equilibration Time (τ , 63%): <40 s (response time in 1 m/s air
stream)
Hysteresis: <1% RH typical
Long term Drift: <0.5% RH/year typical
Range: 40 C to 80 C
Resolution: 0.1 C
Accuracy: Sensor measurement accuracy is variable across a range
of temperatures. Refer to the chart in Figure 2 to determine
the accuracy specification for the VP-4 sensor:
Equilibration Time (τ , 63%): < 400 s (response time in 1 m/s air
stream)
Long term drift: < 0.04 C/year typical
Figure 1: Humidity Accuracy Chart
Temperature
4
VP-4