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Digital Humidity and Temperature Module - HYT 221

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• Calibrated and temperature compensated
• Excellent humidity/temperature accuracy and stability
• High chemical resistance
• I2C protocol (address 0x28 or alternative address)
• Wide humidity and temperature range (0 % RH to 100 % RH and -40 °C to +125 °C)

Model Number: HYT 221
Data Sheet:

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Product Specification

Further advantages of the HYT 221 digital humidity module include:

• Calibrated and temperature compensated

• Excellent humidity/temperature accuracy and stability

• High chemical resistance

• I2C protocol (address 0x28 or alternative address)

• Wide humidity and temperature range (0 % RH to 100 % RH and -40 °C to +125 °C)

• Very low drift

• Very stable at high humidity

• Interchangeable without adjustments

The IST AG digital HYT 221 humidity module is suitable for various meteorology, industrial drying systems, medical devices and agriculture applications.

Technical Data:

Operating temperature range	-40℃ to +125℃
Operating humidity range	0 % RH to 100 % RH
Hysteresis	< ±1 % RH
Linearity error	< ±1 % RH
Temperature error	0.05 % RH/K (0℃ to +60℃)
Operating voltage	2.7 V to 5.5 V
Current consumption (nominal)	< 22 µA at 1 Hz measuring rate; 850 µA max.
Current consumption (sleep)	< 1 µA
Digital interface	I²C, address 0x28 or alternative address
Operating voltage (limits)	-0.3 V to 6 V
Storage condition	-20℃ to +50℃
	Humidity	Temperature
Accuracy	±1.8 % RH at +23℃ (0 % RH to 90 % RH)	±0.2 K (0℃ to +60℃)
Reproducibility	±0.2 % RH	±0.1 K
Resolution	0.02 % RH	0.015℃
Response time t₆₃	< 10 s with membrane filter	< 10 s with membrane filter
Long-term drift	< 0.5 % RH/a	< 0.05 K/a
Measuring principle	Capacitive polymer humidity sensor	PTAT (integrated)