Guided Wave Level Measurements ~ Aerospace Parts Cleaning Bath

When a Canadian manufacturer of metal aircraft, satellite and military parts needed reliable level measurement of their chemical day tanks and parts cleaning baths, they turned to #Flowline.

Before metal finishing, the aluminum or titanium parts are soaked in baths to remove residual grease, oil and emulsions. The alkaline cleaning chemical foams when pumped to and from the day tanks, and into the baths. During this, plant engineers complained of intermittent measurement from past ultrasonic level sensors, due to acoustic signal attenuation. For this reason, the guided wave sensors were suggested as they are unaffected by most process conditions such as foaming chemicals, vapour, vacuum and grease.

The LG10 and LG11 Series of liquid level sensors?provide continuous level data by emitting an RF pulse down the probe. The pulse reflects against the liquid dielectric material and returns to the feed through. The sensor measures the pulse time of flight and translates it into liquid level height back to the PLC which replenishes the day tanks and controls the bath process.