The MassExact inline slurry density gauge from MPV Tech calculates specific gravity by measuring direct mass over a known volume within a canister. Continuous slurry readings occur 100 times per second with a 45-millisecond data response time. The gauge is accurate up to 99.5 percent with 0.1 percent repeatability. Features include single-button calibration with vibration, noise and temperature compensation. 407/337-0110; www.directdensity.com.