Online optical fiber ammonia nitrogen sensor

Abstract

The invention discloses an online optical fiber ammonia nitrogen sensor which is suitable for detecting the ammonia nitrogen content in water. The ammonia gas sensor comprises a waterproof and breathable gas chamber, a sensing device used for sensing the concentration of ammonia gas and generating an optical signal, a conversion device used for converting the optical signal of the sensing device into an electric signal, a processing device used for converting the electric signal into a digital signal, and a waterproof circuit chamber, wherein the sensing device is arranged in the gas chamber,the conversion device and the processing device are connected and are both arranged in the circuit chamber, and the sensing device and the conversion device are correspondingly arranged so as to transmit optical signals. The online optical fiber ammonia nitrogen sensor provided by the invention can effectively detect the ammonia nitrogen content in water, is simple to operate, and can be popularized and used.

Description

technical field [0001] The invention relates to the technical field of water quality detection, in particular to an online fiber optic ammonia nitrogen sensor. Background technique [0002] In the process of aquaculture, with the continuous increase of fish excrement and excess organic matter deposition, the ammonia nitrogen content in water is also increasing. Excessive ammonia nitrogen content will cause eutrophication of the water body, which will lead to a large number of fish deaths due to lack of oxygen in the water. Therefore, it is necessary to detect the ammonia nitrogen content in the water. [0003] In the prior art, the analytical methods for detecting ammonia nitrogen content mainly include spectrophotometry, Kjeldahl method and ammonia gas sensitive electrode method. Among them, the spectrophotometric method is highly sensitive, but it is easily affected by the chromaticity and turbidity in water, the operation is complicated, the reaction time is long, the ch...

AI Technical Summary

Problems solved by technology

Among them, the spectrophotometric method is highly sensitive, but it is easily affected by the chroma and turbidity in water, the operation is complicated, the reaction time is long, the chemical reagents are expensive, and it will cause secondary pollution; the Kjeldahl method has high sensitivity and good accuracy. However, the equipment is expensive, the operation is complicated, and the equipment is too large to be easy to carry; the ammonia gas-sensing electrode method is currently the most widely used method, which is cheap and does not require high staff, but is vulnerable to volatile ammonia and high-concentration dissolved ions etc., which lead to a decrease in detection accuracy, and the internal electrolyte is easily polluted, and the electrolyte and reference electrodes need to be replaced regularly, resulting in cumbersome operation

Images