An analyzer has a horizontally disposed baseplate on which primary containers and secondary containers are disposed, a pipetting needle, a transport device, and a control device. The pipetting needle is formed of an electrically conductive material and is connected to a metering device by a tubing, and...http://www.google.co.uk/patents/US5512247?utm_source=gb-gplus-sharePatent US5512247 - Apparatus for testing pipetting needle linearity in an automated analyzer
