Thermal level switch LS 300

PTCfor waterfor wastewater

Our thermal limit switch, prevents the overfilling of tanks and process containers. It consists of a sensor (LS 300) installed inside the tank and a transducer (LS 500) with an output relays. For water-polluting liquids, this overfill prevention device is an indispensable component for environmental protection. How it works At the switching point of the sensor LS 300 an isolated PTC resistor is mounted. The PTC resistor is a variable resistor, with the resistance increasing with temperature. Since the liquid has a better heat conductivity than gas, the PTC resistor heats itself more readily in the air and vapor area. When immersed into a liquid, the PTC resistor is cooled down. The resistance value is evaluated by the transducer LS 500. Level Detector LS 300 We offer a variety of special designs that are designed where space is limited or installation conditions are difficult and challenging. From laboratory bottles to rail wagons we find a suitable solution - challenge us!