The ESi Controls ESCTL High Limit Cylinder Thermostat is a practical pocket mounted mechanical Cylinder Thermostat. It is configured specifically for the control of the domestic hot water cylinder to suit householder lifestyles. The ESCTL can be used to switch directly a wet central heating circulating pump or boiler, or to operate zone valves. The bimetallic sensor ensures accurate hot water temperature control, whilst the tamper proof feature adds further peace of mind for the end user
