John C. Ernst Co., Inc. is a manufacturer of glass liquid level gauges and valves. Liquid level gauges are industrial meters that are used to determine the level of a liquid in a process tank. Liquid level gauge calibration is used to ensure proper readings are obtained when using level gauges. They have several advantages including durability for severe environments and also having the ability to withstand high temperatures and pressure. They are easy to read from a distance and can be used in addition to a switch or alarm in a system. There is little maintenance required and all repairs can be done without disturbing the system. They can also be customized for extreme applications. Our liquid level gauge & valve specialists are available to answer your product specification questions. Contact us today.