Product Number: E21M001
The Radiometer REF251 Reference Electrode has a glass body, Red-Rod reference system, refillable electrolyte (sat. KCl), double-junction, and porous pin junctions. The REF251 reference probe is recommended for challenging samples or general purpose measurements. The REF251 has a 1 meter fixed cable with banana plug. It can be used with Radiometer MeterLab and Hach sensION+ benchtop meters.
To meet your analysis needs, Radiometer Analytical reference electrodes are available with a variety of reference systems and liquid junctions. There is a Radiometer electrode for every application.
The symmetry formed by the internal and external Red-Rod reference elements means that the iso pH is the same as the zero pH which provides highly reproducible results and a fast, accurate response, even when temperature fluctuations occur.
Red-Rod electrodes provide a stable signal fast by protecting the reference elements from light interference. The Red-Rod saturated KCl salt-bridge also aids in creating a stable liquid junction potential.
The Red-Rod system creates a trouble-free liquid junction. The Red-Rod encapsulation of reference elements means no silver ions and therefore less risk of clogging when measuring in challenging sample matrices.
The Red-Rod reference system enables use over a wider range of temperatures than for most pH electrodes.
*when applicable
Phase Out
Items with this label are at the end of their life cycle and may become obsolete in the future.
Obsolete
Items with this label are obsolete and unavailable through eCommerce.
If applicable, please view Replacement Product above or contact Hach Customer Service for further assistance.
