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The output voltage range of the CHS series is 0 to 1,000mV and humidity can be measured with the relational expression below.
Humidity [%R.H.] = output voltage [mV] x 0.1
Therefore, a data logger that can record voltages from 0 to 1,000mV is needed.
Please also use the data logger with an input impedance of 10MΩ or more.
Please make measurements with a buffer such as an operational amplifier inserted if the input impedance is below 10MΩ.