Overview The Hygrometer TK-100 YN Model is a battery powered portable instrument. It is suitable for the field measurements where electrical power is inconvenient or the multiple-points measurements. TK-100 Dew Point Transmitter is set inside of the instrument for the measurement from -100 degC dp to +20 degC dp, at an accuracy of +/- 2 degC dp. TK-100 Transmitter The core measurement tool for YN Model is TK-100 Dew Point Transmitter, manufactured by TEKHNE Corporation, Japan. TEKHNE Ceramic