LG1 vertical operation level gauges series is suitable to signal the minimum or maximum level of a fluid in the tank. The fixing flange allows three fixing typologies in only one execution. This instrument has the electric exchange contacts in the standard execution and simple electric contact in the execution with an incorporate thermostat. “LG1R” series is the execution with the possibility to regulate the height of the float, while the “LG2” allows to cut the rod and choose the distance of the float. “LG1” and “LG1R” series are also available with the electric contact for the control of the temperature.