Image based instrument viability controls. Our particle standards offer discrete "live" and "dead" populations. They can be delivered in customizable ratios & concentrations. ViaCheck™ SingleShots™ minimize error and maximize efficiency by circumventing potential human error from repeated bottle resuspension & pipetting steps. BLI50BS is the SingleShot equivalent to 20mL Cat. #24626Viable: 100%Count: 1 x 106