What water dosing accuracy should a refractory mixer achieve?

Most refractory castable specifications require water addition accurate to within about 0.1 to 0.2 percent by weight, since even small deviations affect flow, density, and final strength after curing. Mixers with calibrated, programmable water metering systems achieve this consistency far more reliably than manual hose dosing, which varies between operators and batches. Sparkline Group specifies mixers with digital water dosing controls for exactly this reason, ensuring batch-to-batch consistency across a shutdown. This is worth confirming during any mixer trial before a large project begins.