Mass Balance and Volume Compare mass, balance and volume calibration services by matching the current scope, range, method, uncertainty, certificate and service location to the equipment's intended use. Picking a calibration provider always seems straightforward—until the quotes roll in. One lab specializes in mass calibration. Another talks about balance calibration. A third offers volume calibration via a gravimetric method, which oddly enough also uses balances and reference weights. The prices, uncertainties, and certificate formats can vary just as much as the services themselves. These services might sound similar, but they’re not interchangeable. Mass calibration is all about assigning values to weights and standards. Balance calibration checks how accurately a weighing instrument performs. Volume calibration measures how much liquid a device holds or delivers, often using gravimetric methods that tie back to mass and balance. So, how do you choose the right calibratio...