Elecro Replacement NTC Electronic Digital Thermostat 100-240v AC

Elecro Heater spare part - 124-1045 NTC thermister electronic thermostat with digital display.
Alternate Elecro Optima Compact and Titan Optima single and three phase electric heater electronic thermostat

NTC temperature sensor not included
Digital thermostat 10-40 degrees C
Preset with parameters required for use with Elecro heaters only. Must not be modified.
78mm x 35mm x 63mm deep.
Hole required 71mm x 29mm. 240v AC, 50/60Hz, Output 8A resistive load

Main difference to original thermostat is that this version displays 'SA' instead of 'NoF' when there is no/insufficient water flow.