Ladder strip coupon holders are designed to simultaneously monitor corrosion at various levels in a process line. This is a technique employed in large diameter pipelines (8" O.D. and greater) where corrosion may not be uniform across the diameter of the pipe, or in systems where flow is stratified. These coupons are rectangular with the following dimensions: L2” x W3/4” x T1/8” (51mm x 19mm x 3.2mm). They are designed to be mounted in pairs with three pairs of ladder strip coupons attached to a single ladder coupon holder. Ladder strip coupons are supplied with nylon insulation for mounting