The Prototype Design of Water pH and TDS Indicator Device based on Microcontroller Arduino

Fishery sector plays important role in fulfilling the food supply. The increase in fish consumption directly impacts the fishery sector, on how to deliver well-qualified fishery products. The company that operates in the fishery sector is the agribusiness company located in Jakarta. Two products are manufactured, which are Red Tilapia fish and Catfish. This research aims to design the work system for a water pH and TDS indicator device by using Microcontroller Arduino, specifically designated for a fishpond. This device uses a sensor and utilizes a block diagram for device design. Several tests on various ponds were conducted to determine error percentage. According to the pH sensor, Pond 1 was recorded with 0.658%, Pond 2 with 1.091%, and Pond 3 with 1,495%. While, by using the TDS sensor, it can be calculated that Pond 1 resulted in 2,0%, Pond 2 with 4,701%, Pond 3 with 1,495%, for its error percentage. For an accurate result, the company should perform routine inspections and maintenance on devices.