Aprilaire® Digital Modulating Control, 24 VAC, 24 AWG Wire, 36 in L Lead, Relay: 2.8 in W x 1.7 in H x 1-1/2 in D, Modulating Humidistat: 2.85 in W x 4.85 in H x 1 in D, Duct Humidity Sensor: 3-1/2 in W x 2.16 in H x 5.26 in D

• Digital modulating control controls humidity in a range of 0 - 100% RH
• Duct humidity sensor measures the RH in the duct and responds to the needs of the ADMC wall-mounted humidistat
• Outdoor temperature sensor used for temperature compensation
• Remote duct sensing for better application flexibility
• Proportional high limit override to prevent over-humidification within the duct and costly water damage
• Multi-level lockable access menu and lockable setpoint to prevent accidental changes
• 0 - 10 VDC, 2 - 10 VDC output (Modulating Humidistat), 0 - 10 VDC Output (Outdoor Temperature Sensor), 24 VAC/DC coil input (Blower Activation Relay)

• Specification Sheet https://assets.unilogcorp.com/267/ITEM/DOC/Aprilaire_63_Specification_Sheet.pdf