Lianhua Technology has always been at the forefront of water quality testing since 1982. Maintaining water quality becomes much more efficient with proactive monitoring. Take, for instance, our Portable Wastewater Optical Dissolved Oxygen Meter. It is one of the many innovations built around measuring the accuracy of various water sources. It employs advanced optical technology for measuring dissolved oxygen. It is built for efficiency by delivering quick results, maintaining the accuracy for which we have built our reputation.