Retractable Coupon Holder is used to insert corrosion coupons into a pressurized line through a valve without shutting down the line. Retractable coupon holders are used up to 1500 psi and 500°F (260°C). This coupon holder design employs a packing gland that allows insertion & removal through a ball valve without system depressurization.

Retractable Guide Pins are first connector having an insulating first housing. These are moveable towards and away from the housing. The guide pins being locked in a position away from the first housing by a locking member. The second connector having an insulating second housing. This connector is having a lock release member for unlocking the guide pins during insertion of the guide.