Interior - Heating Concept: Easy-to-clean; grade 1.4301 (ASTM 304); laser-welded; stainless steel interior; reinforced by deep drawn ribbing. Corrosion-proof; large-area heating surface on 3 sides of the tank. Control: Fuzzy-supported PID microprocessor controller with integral autodiagnostic system and fault indication. Solid state switch unit. 2 x class A; 4-wire; Pt100 sensors; mutually monitoring and controlling performance at the same temperature. Digital timer from 1 min to 999 hours for: On (continuous operation). Delayed On. Hold; or set temperature-dependent Hold with fixed dwell time. Digital display (LED) of all set parameters; such as temperature; time and alarm values. Calibration facility on controller. Audible and visual alarms at programme end; as keypress input acknowledgement and in the case of low liquid level (heating is switched off automatically). Triple Overtemperature Protection: In the case of overtemperature due to fault the heating is switched off at approx. 10°C above the set temperature (fixed value). Independent; class 2; TWB electronic overtemperature limiter. Class 1; TB mechanical temperature limiter switching the heating off at approx. 30°C above max. bath temperature. Set value display resolution: 0.1°C below 99.9°C; 1°C above 100°C. Textured; grade 1.4301 (ASTM 304); corrosion resistant; stainless steel housing. Without covers - please order separately.