Testing concentration and pH on a daily basis monitors corrosion, metal solubility and emulsion stability. Acids, biocides and dirt can be monitored on a weekly basis. However, should results change, daily testing should be done until the cause has been identified and levels return to normal.

Straight Oils - The mineral-based straight oils used in medium to heavy duty applications provide more lubrication than cooling. While they can contain additive packages for enhanced performance, straight oils are the only metalworking fluid not diluted with water. As a result, they do not experience the same foaming, fungus and bacterial problems as water-based fluids. Therefore, they require less frequent testing.