According to ISO 8655, air-displacement pipettes must be tested at regular intervals, with error rates falling within the allowable limits listed in ISO 8655-2. The Pipette Leak Test unit from Brand ensures pipette integrity between such scheduled calibrations. According to the manufacturer, more than 80% of pipettes sent for repair exhibit leaks and fail to meet their volume tolerances, even if they do not drip. Piston-operated pipettes may leak because of damage to the seal, pistons, or tip cones, causing volume errors and inaccurate measurements. The PLT unit provides preprogrammed test limit values from 1 ?l to 10 ml and allows testing with or without the pipette tip to pinpoint the source of leaks. Results are available within a few seconds. For more information, visit Brand GmbH + Co KG.