On a drilling rig, gauges require two kinds of hydraulic instrument fluid: red and clear. Clear fluid (our CW8) improves gauge life by assisting in reducing rig vibrations and corrosion from harsh industry conditions. Red fluid, also known as red hydraulic fluid (CW-15), is used in pressure, torque and weight systems to transmit readings between a gauge and its sensor. Having the right amount of red and clear fluid is essential to keeping drilling rig instrumentation running efficiently. Crown offers both red and clear drilling rig instrument fluid in both quart and gallon sizes. Our fluid is made of the highest grade materials so that you can rest assured that your gauges and sensors will be protected.