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Limit Switch

Lidec Liquid Limit Switch

Lidec liquid limit switches are point limit detection sensors for high level and overfill protection that ensures safety along with simpler and cost-effective maintenance.

Overview
What Is It?
Lidec is a no-moving-parts liquid limit switch that has several applications:
  • High level alarms for product storage tanks: With single or dual limit detection, Lidec can be connected directly to any alarm monitoring system with the options for redundant output from a single instrument.
  • Service tanks: Lidec, being insensitive to conductivity, provides a simple, reliable solution for level switching in all types of service tanks.
The proven Lidec technology is insensitive to changes in density, temperature or pressure, thereby doing away with the need for calibration. It, therefore, ensures quick and simple commissioning. The stainless steel housing can be mounted directly on deck. Since there are no moving parts, maintenance and mechanical wear are kept to the minimum.
 
How Does It Work?
Lidec’s patented operating principle is based on the propagation of a surface wave inside a stainless steel probe. This principle is fully static without vibration or moving parts. A self-monitoring function ensures the reliability of this equipment. The principle used is fail-safe by design or positive safety – any malfunction triggers detection. Therefore, no periodical cleaning or manual testing is necessary. This allows the sensors to be used in safety systems used for high level and overfill detection and control. Furthermore, the sensor diameter is compact and requires a smaller hole in tanks walls and roofs.
 
What Problems Does It Solve?
Failure of limit switches used for high level and overfill detection leads to operational and environmental damages due to leakage of the valuable product being stored in tanks. The fail-safe by design Lidec limit switch has zero moving parts making it an easy to maintain and operate limit switch. The modular component design helps with replacement of easily available spare parts. Repairs of the sensor probes and electronics can be done at the site itself for maintaining continuity of limit switch performance across product ​storage tanks.
 
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