Sangamo are a UK manufacturer of time clocks/heating controls, thermostats, immersion controllers & programmers. The brand is also recognised for their Round Pattern Time Switches. Q554.2 - 20A 3 Pin 24 Hour Round Time Switch The 24 hour programming time switch cycle performs the same sequence of switching operations on each day and can be quickly and easily set using the small manual levers on the dial. A “day omit” device allows you to select any number of days in the week on which the switching cycle can be disabled. A general purpose timeswitch for heating, ventilation and equipment control applications. Programming: 24 hour with either 2 or 3 operations Current Rating: 20A Connection Pins: 3 Battery Reserve: 100 hours Day Omit Dial: Yes (Omits the ‘ON’ operation) Fixing: Surface Mounting Ingress Protection: IP20 Operating Temperature: 0°C to 50°C Dimensions: 146.5mm x 105.7mm x 82mm Display: 24 Hourr Dial Timing Accuracy: 5 Minutes/Year Contact Type: SPST