AMB1D500 COD Calibration Solution, This 100 mL solution is meticulously formulated to calibrate chemical oxygen demand (COD) meters, ensuring they provide accurate and reliable readings essential for environmental compliance and water treatment processes. With a standard concentration of 500 ppm, it helps maintain the functionality and accuracy of your COD meters, supporting effective monitoring and management in both laboratory and field settings. It's compatible with all standard COD meters, making it a versatile tool for your calibration needs.