MEASURING PROBES FOR MEASUREMENT AND TAKING SAMPLES IN MOLTEN METAL Russian patent published in 2015 - IPC G01N1/10 G01N33/20 

FIELD: measurement equipment.

SUBSTANCE: invention relates to a measuring probe for measurement and taking samples in molten metal. The probe is provided with a measurement head located on a rod, which includes at least a temperature sensor and a sampling chamber. The latter is at least partially enveloped with the measurement head and includes an input channel passing through the measurement head. The input channel has an internal section with length L, which is located in the measurement head, and has minimum diameter D at least at one point in this internal section; with that, L/D² ratio is less than 0.6 mm^-1. Besides, the measurement head has counter pressure P_g of lower than 20 mbar, which is determined so that first a reference gas flow is passed via a pipe with two open ends, and pressure P₁ is measured in the pipe. Then, the pipe is inserted with one end into the inlet channel of the measurement head; the same reference gas flow is passed via the pipe and pressure P₂ is measured in the pipe, and counter pressure P_g of the measurement head is determined based on difference P₂-P₁.

EFFECT: improvement of quality of the obtained samples.

23 cl, 5 dwg