Rohs approval 4. Electrical characteristics 4.1 input power:1vac (sine wave),1khz 4.2 operating temperature range: -20c ~ 70 degree c 4.3 operating humidity range:95 %rh or less 4.5 accuracy: +/-2.5 %rh (at 25c,60 %rh) 4.6 hysteresis: Within 2 %rh (40 %rh ~ 80 %rh) 4.7 stability:1 year 5. Reliability 5.1 heat resistance: Less than 30 %rh) 5.2 cool resistance: Less than 70 %rh) 5.3 humidity resistance: 40c,90 %rh) 5.4 temperature cycle: (300 cycles:30 minutes at -30c,30 minutes at 90c)