The AELD-11 is an economical visual indicator for monitoring liquid flow in pipework, including machine-building and food-processing applications. The indicator tube can be selected in glass or acrylic, with nickel-plated brass or plastic unions and optional stainless-steel connections.

The catalogue lists glass/acrylic temperature limits of 60/100 °C and pressure limits of 2/3 bar respectively; confirm the selected material and rating when ordering. An optional capacitive contact can detect liquid through non-metallic plastic, glass or ceramic walls. Sensitivity is adjustable and an LED provides status indication; the contact can be used for minimum/maximum level or flow indication.