Background: Serum electrolytes are one of the most frequently requested tests in patients from critical care settings. Methodsfor estimation of serum electrolytes include direct and indirect ion selective electrode (ISE). In case of indirect ISE. the pre-analytical dilution step can result in pseudonormonatremia or pseudohypernatremia in setting of hypoalbuminemia. https://foldlyers.shop/product-category/din-rail-enclosures/