巴基斯坦采购需求：电导率控制器、电导率传感器、电导率/TDS 控制器、EC 分析仪、EC 控制器、EC 传感器

Could you please provide the PDF version of the TDS meter specifications? I'm looking for a TDS meter that features an open/close circuit design for live monitoring. It's essential that the device can automatically cut off the water pump when the TDS levels reach a specific high threshold, ensuring optimal water quality management. Additionally, if there are any detailed technical documents, user manuals, or installation guides available, that would be really helpful. I'm interested in understanding the product's functionality, performance metrics, and any other relevant features that can assist in my decision-making process. Thank you for your cooperation!