| 摘要 |
PROBLEM TO BE SOLVED: To obtain a nozzle equipped with an electrode for detection the liquid level, or the like, in which positional shift and dielectric deterioration are prevented by containing a nozzle pipe and an electrode wire vertically in a holding tube and securing in place with resin. SOLUTION: A nozzle for sucking or delivering a sample in an automatic analyzer is constituted by inserting a nozzle pipe 2 and an insulated electrode wire 3 vertically into a holding tube 1 and securing them in place with resin 4. One end of the electrode wire 3 is located at a position stepped with regard to a nozzle hole 8 and a contact 5 with liquid is provided by stripping the insulation coating to expose the forward end. Since the nozzle operates while being balanced even if it is moved up/down or turned quickly and the reproducibility of measurement is enhanced while prolonging the expected lifetime. When the contacts of a plurality of wires are arranged stepwise, the use range can be widened and when the nozzle pipe and the electrode wire are passed through a guide chip having a longitudinal hole and inserted into the holding tube, they can be arranged to facilitate manufacture. |
