Gulf Oil & Gas International supplies the genuine Xtralis VESDA VSP-031 (516-018-324) VLI Secondary Filter for VESDA VLI early warning aspirating smoke detection systems to maintain high-sensitivity detection and stable alarm performance in high-stakes environments like oil & gas facilities, data centers, and manufacturing plants. This secondary foam filter is designed to work with the VLI Intelligent Filter (VSP-030) as part of the VLI detector’s two-stage filtration architecture, managing airborne dust and larger particulates before air reaches the optical chamber. The VSP-031 supports robust, absolute smoke detection while helping preserve transport time and sensitivity, making it ideal for dirty, high-dust, or industrial environments. Easy field replacement restores full VLI detector performance without system downtime and is recommended as part of routine maintenance when the intelligent filter or environmental conditions warrant filter changes. The VSP-031 is compatible with the VESDA VLI series of aspirating smoke detectors used for very early smoke detection in critical infrastructure and high-value assets.