Is the PA66 composite body flammable? What flame-retardancy rating does the LGF-PA66 achieve?

PA66 (nylon 66) is a self-extinguishing engineering plastic with an oxygen index around 24 — far above common combustible plastics. It chars and stops burning once the flame source is removed. Glass-fibre reinforced PA66 formulations reach UL94 V-0: a vertical specimen self-extinguishes within 10 seconds without flaming drips. The aviation-grade reinforced PA66 used for the LGF-PA66 body belongs to this high flame-retardancy class and is safe for outdoor meter pits and pump stations.

For hazardous areas, look at the system in layers:

• The sensor (PA66 body, electrodes, excitation coil) is a passive, fully insulated assembly with no power supply or exposed metal — it cannot act as an ignition source by itself;
• Explosion protection is defined by the transmitter's marking: choose intrinsically safe Ex ia or flameproof Ex d according to the zone classification;
• For petrochemical Zone 1/Zone 2 sites, combine a certified Ex transmitter with the LGF-PA66 sensor and install per GB 3836 / GB 50058, or the IEC 60079 series for export projects.

Material flame-retardancy test reports and transmitter Ex certificates are available before shipment. For zone classification on a specific project, send the site conditions to our technical team — never fit a non-Ex transmitter in a hazardous zone.

For more information, please visit our product pages or contact our technical team.