Humidity Controller MFR012 Overview A compact DIN rail humidity controller designed for reliable humidity monitoring and switching in electrical and automation installations. Compact size, wide voltage compatibility, and a durable design make it suitable for control panels, HVAC, and generalpurpose humidity control. Key benefits Accurate humidity control: 4% relative humidity reading with +/ 3% tolerance, accuracy measured at 50 percent relative humidity. Wide voltage compatibility: supports 12 to 250 V AC or DC input, simplifying integration into existing systems. Durable switching: long service life of more than 100 000 cycles for reliable operation. Easy installation and wiring: 35 mm DIN rail mount and clear 23 pole terminal wiring for fast panel assembly. Compact and robust: small footprint and impactresistant PC housing for spaceconstrained control cabinets. Main features Model: MFR012 Item type: Humidity controller Measurement specification: 4% relative humidity with +/ 3% tolerance (at 50 percent relative humidity) Allowable air velocity: up to 15 m/s Switching and exchange capacity: 20 V AC or DC, 100 mA (signal exchange) Contact rating: 250 V AC, 5(1) A; DC switching power up to 20 W Service life: greater than 100 000 cycles Electrical compatibility: supports wide input range 12 to 250 V AC or DC Connection: 23 pole terminal, accepts solid wire up to 2.5 mm2; ferrule connection up to 1.5 mm2; recommended maximum clamping torque 0.5 Nm Installation: 35 mm DIN rail mounting (EN 50022 compatible rail slot) Housing: light gray PC material with heat and impact resistance, good electrical insulation and dimensional stability Protection type: IP20 Size and weight: 67 x 50 x 38 mm (2.64 x 1.97 x 1.5 in), weight 60 g (approx. 2.12 oz) Operating temperature: 0 to +60 C (32 to 140 F) Storage temperature: 20 to +80 C (4 to 176 F) Wiring note Terminal arrangement: terminal 1 is line input, terminal 2 is neutral output. Supports wide voltage input from 12 to 250 V AC or DC for flexible installation. Package contents 1 x Humidity Controller MFR012 Practical applications HVAC control panels: use for controlling dehumidifiers, humidifiers, or ventilation interlocks to maintain target humidity in rooms and ducts. Equipment cabinets and server rooms: prevent condensation and excessive humidity that can affect electronics by activating fans or dehumidification equipment. Storage and archives: automate humidity control for storage areas holding sensitive materials, packaging, or dry goods. Additional notes Back rail slot allows easy attachment to standard 35 mm DIN rails. The product may be supplied as either a type or an older type; items are sent randomly. Please confirm acceptance of this before ordering.