The Model 6210 Coupon Holder Assemblies provide a retractable means of coupon monitoring in processes at pressures up to 1500 PSI/10.3 MPa and temperatures up to 500º F/260º C. Insertion of the coupon holder can be adjusted to permit coupon positioning at precisely the desired point within the process. Standard lengths are available in 18, 24, 30 and 36 inches. The single tongue of the coupon holder allows the use of one or two strip coupons, insulated or uninsulated. All coupon holders are supplied complete with mounting hardware for the coupons. A safety clamp assembly is recommended at pressures above 100 PSI and temperatures above +150º F.