The OLS700D3LSH Liquid Level Sensor by Sensata is an open collector low-dry output 1/4" NPT and 3/8" Conduit. The sensor is designed to detect the level of liquids in tanks such as fuel tanks, wastewater tanks, and other industrial applications. It is capable of detecting up to four different levels of liquids, either high, low, or in-between. The OLS700D3LSH is designed to be durable and reliable, with its solid-state probes, sealed relays and stainless steel hardware. It features a choice of mounting style and conduit size, and an LED indicator to show which level it has detected. The OLS700D3LSH has the capacity of activating multiple alarms based on the levels detected, and is able to be customized to meet specific needs.