Online colorimetric sensor

Abstract

The invention discloses an online colorimetric sensor, comprising a shell, an upper cover plate, an indication reagent tube, a reactor, a stepping motor and a control circuit. The indication reagent tube, the reactor, the stepping motor and the control circuit are set in the shell. A through hole for placing the indication reagent tube is set on the upper cover plate. The reactor is connected withthe stepping motor and the indication reagent tube. The stepping motor is connected with the control circuit. An electric three-way valve is set between the reactor and the indication reagent tube. Asample inlet is set at one end of the shell away from the upper cover plate. According to the online colorimetric sensor, a structure is simplified, a body size is small, reagent is replaced conveniently, low cost detection is carried out, the reactor is pollution resistant and a use cycle is long.

Description

technical field [0001] The invention relates to the detection field, more specifically, it relates to an online colorimetric sensor. Background technique [0002] At present, in industrial water, drinking water, tap water, natural water and other occasions, it is usually necessary to detect water quality indicators such as residual chlorine, iron ions, and hardness. A method with relatively high accuracy is to add corresponding indicator reagents to the tested liquid, and the reaction is obvious. After the color is changed, the concentration of the corresponding indicator in the tested liquid is calculated by detecting the degree of change of the indicated color. [0003] Usually, in the above occasions, a device is required to continuously measure the water quality indicators. The current devices usually use multiple peristaltic pumps, one pump pumps water samples to the reactor, and the other pump pumps reagents to the reactor for reaction, and finally measures The color ...

AI Technical Summary

Problems solved by technology

[0004] The existing on-line detection device has a large number of parts, complex structure and control logic. Usually, the product form is installed in a box or a cabinet, which makes it difficult to achieve miniaturization and cost reduction, resulting in difficulties in installation and deployment in practical applications.

The reactor of the existing detection device is easy to scale or be contaminated by impurities, which affects the optical measurement. It needs to be removed regularly and manually cleaned, and the maintenance workload is heavy.

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