The rugged microwave Mixer Moisture Sensor

AquaMix microwave mixer moisture sensor controls the water dosing to give consistent moisture or slump in the final product.

The AquaMix digital microwave on-line concrete mixer moisture sensor is highly sensitive to moisture changes in the mixer.  Installed in the concrete mixer floor or wall, it measures the material as it is mixed, passing the ever-changing moisture value to the control system for measurement and control.  The AquaMix sensor’s faceplate has to endure the harsh abrasion of the aggregates as they mix;  consequently, it uses high-tech Silicon Nitride ceramic, almost diamond hard and thicker, tougher  than anything else in the industry.

Product features

AquaSense corrects the dry weights of material in the batch; AquaMix corrects the water in the mixer to give constant yield, colour/texture, workability, strength and durability . . . . Read more

Faceplates and wear

Silicon Nitride cap, at left, shows no wear while Alumina at right is at end of life

Most manufacturers of microwave mixer moisture sensors for concrete use a ceramic known as alumina, which is aluminum oxide, Al2O3. This material is very hard and tough, lasting months to years in concrete mixer applications, depending on the volume of concrete produced and the abrasive qualities of the aggregates. One other manufacturer (Hydronix) has switched to sialon, which is an aluminum oxide / silicon nitride composite giving wear superior to alumina. In 2002 we investigated sialon and silicon nitride, settling on silicon nitride, Si3N4 for all future production. This material is harder than both alumina and sialon . . . . Read more