The Prometra NEF22-DZ is a high-performance dual-channel engine flame monitor manufactured by Prometra. This flame detector is used in conjunction with natural gas or propane fuel engines to ensure safe operation. It is equipped with advanced digital signal processing technology to capture any flames and alert the operators. The NEF22-DZ model is UL listed and certified for safe use in commercial and residential spaces, as well as for Class I, Division 2 hazardous locations. It features a two-stage flame sensing verification system and a wide detection range, making it capable of detecting both open and smothered flames. The NEF22-DZ also has user-friendly features like quick connect accessories and a diagnostics mode for troubleshooting.