Level Sensors for Low Coolant Warning in Earth Movers


Earth movers are some of the biggest and heaviest equipment in the off highway vehicle (OHV) industry. Keeping these machines running properly is critical so they can continue to dig, push, and transport earth. In these machines, level sensors provide a signal to indicate low level of coolant.


iStock-485762094Challenge: Accurate level indication

Equipment operators of earth movers and crawlers are to be alerted of low level via the equipment’s dashboard through the onboard PLC.  This alert to the equipment operator is critical to ensure that they shut down the machine before the engine suffers a damaging thermal event due to a lack of coolant. The level in this customer’s application before they came to Gems would falsely indicate low coolant level with all terrain inclines.


Solution: Gems ELS-1150


The solution was a rugged no moving part level sensor with leak-proof housing and high temperature and pressure capabilities to withstand the harsh environmental conditions while eliminating false actuation due to terrain inclines. The customer purchased Gems ELS-1150 high performance electro-optic level sensors with fused glass prisms. This eliminated leak potential and increased capabilities for high pressures and temperatures to withstand the demands of this application.

The ELS-1150 Series Single-Point Level Switch is a versatile level switch with a micro-processor board featuring sinking, sourcing, and optional time delay outputs. The compact construction, measuring only 1.38" (35 mm) long, makes it suitable for a wide range of applications that can handle extreme temperatures and pressure up to 2500 psi (172 bar). For applications requiring corrosion resistance, the stainless steel version, ELS-1150SS is recommended. ELS-1150XP, the compact explosion-proof model, is ideal for Oil & Gas applications that require reliable, accurate level sensing of potential hazardous media.
• Fused Glass Prism for High Pressures
• Excellent Price-to-Performance Ratio
• Ideal for Corrosive Environments