Microcurrent humidity sensor offers +/-3% accuracy
HDC1050 is a 1.3µA ±3% accurate digital humidity sensor, that includes a ±0.2C accurate thermometer. That supply current it at 1sample/s and 11bit resolution, which can be raised to 14-bit, and a sleep mode offers 100nA quiescent. . Output is over I2C interface and operation is 2.7-5.5V and -40 to 125C for the temperature sensor and -20C ...