Choosing between an external mounted and an internal level gauge depends on your application. Internal gauges, like floats or probes, contact the liquid directly, which can lead to issues like coating, corrosion, and mechanical failure.

External mounted gauges offer significant advantages. They provide non-contact measurement, eliminating contamination and wear. Installation is safer and cheaper, as no tank penetration is needed. They are ideal for hazardous, sterile, or corrosive liquids. While internal gauges may be suitable for simple water applications, external gauges deliver superior reliability, safety, and lower lifetime cost for demanding industrial processes. For modern, leak-proof solutions, external mounting is often the better choice.