GPL Odorizers

Unlike other natural gas odorizer manufacturers, our models do not use pipeline gas to actuate the system. For three generations, the Zeck family was the pioneer in developing and designing simple yet precise, natural gas odorant injection systems. The Z associated with YZ Systems, the leading YZ odorizer NJEX manufacturer, denotes the Zeck family. In 2015, GPL Odorizer LLC bought the assets of Sentry Equipment’s odorizer product line. Today, GPL continues to design and manufacture Sentry Equipment and Zeck Systems, continuing a legacy of advanced gas odorizing products in Lakewood, Colorado. View some of our capabilities on our product display page. You can also find our product brochures, manuals, and other documents on our literature page. An odorizer is a machine that injects the odorant into natural gas so that it is detectable to improve safety.