The lack of rapid, reliable and accurate monitoring methods of water quality is a problem impeding rapid detection of any incidents caused by physical or cybersecurity issues as well as natural catastrophes and accidents. Therefore, we want to present a novel approach for the automatic flow analysis applicable in environmental monitoring – the direct-injection detectors (DIDs). They are integrated with a system of solenoid pulse micropumps. The sample and appropriate reagents are injected by the micropumps directly into the detection chamber in counter-current mode. It allows for fast measurement of the analytical signal from the moment of reagents mixing. In studies, the emphasis was put on developing new methodological and instrumental solutions for achieving better validation parameters compared to flow methods described in literature thus far. The aim was for the systems developed to be integrated, small and highly automated. Another important aspect was the simplicity and reliability of the designed systems, so as to facilitate their future commercialization. Flow systems developed in this manner, along with the detection methodology, allow for precise and accurate determination while minimizing the amount of reagents and energy used as well as shortening the analysis time.