Radiant Thermostat - One Stage Heat (includes 079 Slab Sensor) The Radiant Thermostat 519 accurately controls the room and/or floor temperature for a hydronic heating zone using Pulse Width Modulation (PWM) technology. Simple up and down buttons and a display with large type make this thermostat easy to read and use. A Slab Sensor 079 is included to measure floor temperature to protect the floor from overheating and enhance comfort. This easy to install thermostat is a direct replacement for the tekmar Thermostat 509. An optional Adaptor Plate 012 is available which allows the thermostat to be installed onto a single gang electrical box. Features Auto heating cycle Backlight Radiant floor heating Pulse width modulation Freeze protection Includes slab sensor 079 Floor and air temperature control Outdoor and floor temperature display Agency Approvals Meets Class B: ICES & FCC Part 15 Ambient Conditions Indoor use only, 32 to 122 degrees F (0 to 50 degrees C), RH less than or equal to 90 percent non-condensing Control Type Microprocessor control, this is not a safety (limit) control Dimensions 3-11/16" H x 3" W x 15/16" D (94 x 76 x 24 mm) Enclosure Material White PVC plastic Enclosure NEMA Rating NEMA 1 Power Supply 10 to 30 V (ac/dc), 50/60 Hz, 1.8 VA standby, 56 VA max fully loaded, Class 2 Relay 30 V (ac/dc) 2 A, Class 2 circuits Sensor NTC thermistor, 10 k ohms at 77 degrees F (25 degrees C plus / minus 0.2 degrees C) Beta = 3892 Zoning - Thermostat Type Radiant Thermostat Resources Datasheet Installation Instructions More Info