DREF03 Reference electrode Back Catalog number: 18901184 Manufacturer: DLAB Availability: In the manufacturer's stock Price (VAT incl.) 49,13 € 40,60 € - + Recommended 18901208 12.85mS/cm 250mL Conductivity Solution, one bottle 19,90 € 18901199 PH4.00 500mL 4.00pH, one bottle 19,90 € 18901194 PH9.18 250mL 9.18pH, one bottle 12,74 €