Levels MECHANICAL VISUAL LEVEL INDICATOR (EXTERNAL): visual, vertical, simple contact, combinable to additional thermometer, fixed rod length
ELECTROMECHANICAL LEVEL INDICATOR (INTERNAL): vertical, simple contact, fixed rod length
ELECTROMECHANICAL LEVEL INDICATOR (INTERNAL): visual, vertical, SPDT contacts, combinable to additional thermostat, fixed or adjustable rod length
LEVEL TRANSMITTER (INTERNAL): with remote signal at costant level, fixed rod length
ELECTRONIC LEVEL INDICATOR (INTERNAL): with SPDT contacts, (combinable also with remote signal), adjustable with buttons or remote control, with display, fixed rod length
ELECTRONIC LEVEL INDICATOR (INTERNAL): with SPDT contactswith conductive sensor or infrared sensor
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