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Beckman Coulter A51709 Calomel phree, Epoxy Combination pH Electrode**Unit used in Box. Everything in pictured included. Has slight cosmetic blemishes from normal use. See photos for further details.Calomel phree electrode for biological applications is a mercury-free alternative to calomel electrodes.Rugged Epoxy Body over Glass BulbMercury-Free Alternative to Calomel ElectrodesFewer Precautions than Calomel ElectrodesMeter Long & Integrated CableBNC ConnectorA silver-ion trap acts as a third junction to prevent contamination of samples with reference solution.Unique chemistry allows electrode to deliver comparable performance to calomel electrode with fewer precautions for handling and disposal. Rugged epoxy body extends over glass bulb for protection. It features a one-meter-long and integrated cable with a BNC connector.Additional Prep Fees May Apply