斯里兰卡采购需求：DO计，溶解氧仪，在线溶解氧仪，便携式溶解氧仪，光学溶解氧仪，溶解氧分析仪

I'm looking for a multiparameter water quality analyzer that can measure various parameters effectively. It's crucial that the device offers accurate readings for pH, turbidity, conductivity, dissolved oxygen, and other essential water quality indicators. Additionally, I'm interested in features such as user-friendly software for data analysis, portability for field testing, and reliable calibration protocols. Please provide details on available models, pricing, lead times, and any certifications that ensure quality and compliance with industry standards. Looking forward to your prompt response!