In order to improve the system comfort properties, modular humidity sensor should be replaced with a textile sensor. One of solutions is use of textile conductive yarns in sensor design. In literature mentioned textile moisture sensors are designed as several layers sensors, what increases thickness of material or one layer sensors were made where conductive textile yarn appears in both sides of fabric. During this research textile moisture sensor solution was designed when conductive yarns aren’t visible on left side of fabric and are partly insulated on fabric right side. In paper design process of sensor development is described as well as different connection ways of vertical and horizontal conductive yarn traces of sensor electrodes are realized and tested.