HYT 939

HYGROCHIP 1/3 DIGITAL HUMIDITY SENSOR HYT-939 Characteristic Features Both the linearity error and temperature drift are Measuring range 0 .. 100% rH, -40 125C corrected OnChip through computation. Resistant to pressure up to 16 bar Because of the special robust construction, the (Proposals for pressure-tight fitting see applica- sensor also withstands peak loading at high tem- tion note) peratures. Therefore, this special model is also 2 I C protocol for humidity and temperature ideal for extremely sophisticated industrial applica- (address 0x28 or alternative address) tions in drying systems and suitable for medical systems. Accuracy 1.8% rH, 0.2C Further variants and the full spectrum of the Temperature compensated HYGROCHIP product series can be found at: HYGROCHIP 2/3 DIGITAL HUMIDITY SENSOR HYT-939 Technical Data Relative Humidity Accuracy Humidity Measurement Humidity measuring 0 ... 100% rH (1) range see Figure 3 (2) Humidity accuracy 1.8% rH (10 ... 80% rH) see Figure 1 (Maximum tolerance) Accuracy humidity 0 .. (1% rF + 8% a ) w 10% RH (0 ... 50 C) (Typical tolerance) a = rF / 100% w Hysterisis (50% rH) < 1% rH Humidity resolution 0.02% rH Linearity error < 1% rH Response time t < 10 sec with Sinter filter 63 (1) Tk Residual error (50% 0.05% rH / K (0 ... 60C) The maximum dew point is limited to 80C. rH) (2) Long term drift < 0.5% rH / a The accuracy is tested at 23C and 3.3V operating voltage in the direction of rising humidity. The accuracy Measuring principle Capacitive polymer does not include Tk-Residual error, residual linearity humidity sensor error or hysterisis effect. (3) The repeatability is measured in the same direction Temperature Measurement and does not consider the hysterisis effect Temperature measuring - 40 ... +125C range Temperature Measurement Accuracy Temperature accuracy 0.2C (0 ... 60C) see Figure 2 Reproducibility 0.1K Response time t < 10 sec with membrane 63 filter Temperature resolution 0.015C Long term drift < 0.05K / a Measuring principle PTAT (integrated)