An object of the present invention is to provide a disposable pipette capable of avoiding mixing foreign matter into a sample. The disposable pipette of the present invention is a disposable pipette used in a medical field or a biochemical field, and includes a resin-made pipette main body having a connection portion connected to a suction device, and a resin filter inserted into the connection portion. In the resin filter, an elution amount, in a case where the resin filter is subjected to radiation exposure such that an absorbed dose is 20 kGy or more, is equivalent to a maximum absorbance of 0.08 or less in a wavelength range of 220 nm to 241 nm and is equivalent to a maximum absorbance of 0.05 or less in a wavelength range of 241 nm to 350 nm.

Provided is a technique for detecting deviation amounts in two directions between a tip of a nozzle of a pipetting device and a target stop position from one image. An imaging device of the present disclosure is an imaging device installed in a pipetting device including a nozzle that aspirates and dispenses liquid and an arm that holds the nozzle and moves the nozzle by a rotation operation. The imaging device includes: a camera that includes an image sensor and a lens; and a pair of mirrors that includes a first mirror having a first reflective surface and a second mirror having a second reflective surface. The pair of mirrors is arranged such that the first reflective surface and the second reflective surface face each other. The pair of mirrors is arranged one by one between the tip of the nozzle and a bottom surface of the arm, on both sides across a plane that includes a rotation axis of the arm and a central axis of the nozzle. The first mirror is disposed closer to the arm than the second mirror, with the first reflective surface facing toward the tip of the nozzle, and the second reflective surface facing toward the camera.

Aspects of the present disclosure provide a novel design of a pipetting leakage detection apparatus that addresses the shortcomings of the current art for full-time leakage detection for pipetting actions using a single channel pipettor or multichannel pipettors. The pipetting apparatus employs an image capturing device combined with an image analysis process to provide a reliable and comprehensive leakage check for each channel of a multichannel pipettor.

A liquid volume control device for controlling a liquid volume of a liquid in a test tube includes a pump, a driver, a transfer device, a camera and a controller. The pump is connected to a pipette, used to suck the liquid out of a test tube. The driver is connected to the pump and used to drive the pump. The transfer device is used to transfer the test tube. The camera is used to capture a first image of a suction end of the pipette and a second image of the liquid in the test tube. When the first image is captured, the test tube is outside a capture area of the camera. When the second image is captured, the test tube is inside the capture area of the camera. The controller is electrically connected to the camera, the transfer device, the driver and the pump.