The HI-731331N is a pack of 4 spare cuvettes for photometers and turbidity meters. The glass cuvette is the most sensitive part for taking accurate measurements with photometers and turbidity meters. It is important that the cuvette is always clean and without scratches. When using a photometer or turbidity meter it is important to use clean cuvettes that are free from scratches. Any discoloration or scratches will interfere with any optically based measurement. **tutup tidak termasuk(dijual terpisah) hanna hi 731335 caps for cuvette for turbidity meter 4 pec https://tokopedia.link/HOTaCPmz09