The Topworx part number DXP-L20GNEB1A2 is distributed by Electrol. The product that you are looking to replace may be brand labeled GO Switch, Topworx, Valvetop or Emerson. Topworx is a division of Emerson and is headquartered in Louisville, Kentucky. Products include discrete valve controllers, proprietary technology GO Switch brand proximity and non-contact limit switches. We have both nuclear-approved and subsea products for the harshest of environments. Focus industries are oil & gas, pulp & paper, grain handling, food processing, power generation and wastewater treatment. Electrol has been an authorized distributor of Emerson Topworx since 2011.