HYT 221

HYGROCHIP 1/3 DIGITAL HUMIDITY SENSOR HYT-221 Characteristic Features Measuring range 0 100% rH, -40 125C Both the linearity error as well as the temperature Low drift drift are corrected OnChip through computation Stable at high humidity resulting in an outstanding accuracy over a wide Splash water proof with protection filter range of applications. Due to mechanical robust- 2 ness, high chemical stability, dew formation resis- I C protocol for humidity and temperature tance as well as excellent long term stability, the (address 0x28 or alternative address) typical areas of application are humidity measure- Accuracy 1.8% rH, 0.2C ment in saunas, applications in outdoor areas or Temperature compensated industrial applications in the field of drying systems. Further variants and the full spectrum of the Typical Areas of Application HYGROCHIP product series can be found at: HYGROCHIP 2/3 DIGITAL HUMIDITY SENSOR HYT-221 Technical Data Relative Humidity Accuracy Humidity Measurement Humidity measuring 0 ... 100% rH (1) range see Figure 3 (2) Humidity accuracy 1.8% rH (0 ... 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 (3) Reproducibility 0.2% rH Hysterisis < 1% rH Humidity resolution 0.02% rH (1) The maximum dew point is limited to 80C. Linearity error < 1% rH (2) Response time t < 12 sec with membrane 63 The accuracy is tested at 23C and 3.3V operating filter voltage in the direction of rising humidity. The accuracy does not include Tk-Residual error, residual linearity Tk Residual error 0.05% rH / K (0 ... 60C) error or hysterisis effect. Long term drift < 0.5% rH / a (3) The repeatability is measured in the same direction Measuring principle Capacitive polymer and does not consider the hysterisis effect. humidity sensor Temperature Measurement Temperature Measurement Accuracy Temperature measuring - 40 ... +125C range Temperature accuracy 0.2K (0 ... 60C) see Figure 2 Reproducibility 0.1K Temperature resolution 0.015C Response time t < 12 sec with filter 63 Long term drift < 0.05K / a Measuring principle PTAT (integrated)