How it is selected & specified.
External ultrasonic tank level gauges measure through or along the tank wall depending on the selected design, so they must be treated as application-reviewed instruments rather than universal replacements.
WELK confirms tank material, wall thickness, liquid type, measuring range, mounting position, hazardous-area requirement and whether the buyer needs continuous output or local indication.
External Ultrasonic Tank Level Gauge is presented as a configurable WELK product family. Final model limits, wetted materials, process connection, certificate and output signal are confirmed from the selected datasheet before quotation.
Ultrasonic selection depends on blind zone, tank height, vapor, foam, turbulence, temperature gradient and whether a split display, relay output or corrosion-resistant sensor face is needed.
External ultrasonic measurement is application-sensitive; tank wall material, lining and acoustic coupling decide feasibility.
