The Honeywell HIH-5030, 5031 Series Low Voltage Humidity Sensors operate down to 2.7V, often ideal in battery-powered systems where the supply is a nominal 3V. The HIH-5030, 5031 Sensors feature covered integrated circuits and are designed for high volume OEM users. The HIH-5031 is condensation-resistant with a hydrophobic filter. The Honeywell Low Voltage Humidity Sensors provide excellent resistance to dust, dirt, oils, and common environmental chemicals.