Temperature Control System to Optimize Reagent Distribution Process Using the PID Method Equipped with a Security System

The reagent distribution process carried out by PT Wanbass Timur Persada currently uses a distribution box whose temperature must be checked manually using a thermometer and cannot ensure that the storage temperature of the reagents during distribution remains in the range of 2 °C-8°C. Storage of reagents at inappropriate temperatures results in damage to the reagents which makes the user unwilling to accept the product. In addition to controlled temperature. To support the company's performance, a tool is needed that can control the temperature so that it stays at 2-8 °C. Thermoelectricity is used to change the temperature in the reagent distribution box. The cold temperature obtained by the reagent distribution box is influenced by the Peltier effect of the thermoelectric. Cooling components such as thermoelectric and exhaust fans will turn on when the DS18B20 sensor reads a temperature value above 8°C and will keep the box within the reagent-safe temperature range. The method used in this study is PID, this method is intended to assist the tool in maintaining stable temperature values and reaching predetermined setpoints as input. A box access security system is also added so that not everyone can access the reagent distribution box, this helps users and companies in monitoring reagent receipts. Access the reagent distribution box using the barcode that has been given to the recipient or customer, the barcode is different for each user. Barcode reading is carried out using a code scanner GM67 which is integrated with a solenoid. The system data of this tool will be stored on the data logger sd card so that the company can find out the history of reagent storage conditions during the distribution process.