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BNVD-1431 / L3Harris 20UM is a versatile professional-grade night-vision system built on the proven BNVD-1431 housing paired with L3Harris 20-series tubes (Unfilmed White Phosphor).
It combines military-class architecture, balanced image quality, and high operational stability, delivering excellent performance under standard night-time conditions.
The L3Harris 20UM / 20UA tubes are an optimal choice for users who need clean imaging, low noise levels, and effective Auto-Gating without moving into the higher-priced contract-grade families.
They provide a FOM from 2000 and above, making them an ideal solution for most field and civilian applications, including volunteer and professional use.
⚙️ Technical Specifications
| Parameter | Value |
|---|---|
| Housing | BNVD-1431 (PVS-31 class, modular construction) |
| Tube Type | L3Harris 20UM / 20UA (Unfilmed White Phosphor) |
| Tube Format | MX-10160 / MX-11769 |
| Phosphor | P45 (White) |
| Figure of Merit (FOM) | ≥ 2000 |
| Signal-to-Noise Ratio (SNR) | ≥ 28 |
| Resolution (RES) | ≥ 64 lp/mm |
| Halo | ≤ 1.0 |
| EBI (Background Illumination) | ≤ 2.0 |
| Auto-Gating | Yes (high-speed mode) |
| Power Supply | 1× CR123A or external power (PVS-31 standard) |
| Waterproof Rating | IP67 |
| Mount Interfaces | Wilcox / Dovetail / ANVIS-standard |
| Tube Service Life | ~10,000 hours |
| System Weight | ≈ 480–520 g |
Comment / quality level
The L3Harris 20UM / 20UA series represents a professional-class Gen 3 White Phosphor solution that delivers an excellent balance of brightness, contrast, and service life.
The unfilmed design (no oxide barrier layer) provides improved low-light sensitivity and higher resilience to short-term light exposure.
In combination with the BNVD-1431 housing, the user receives a lightweight, reliable, and easy-to-operate system that performs exceptionally well in dynamic environments, inside vehicles, or during stationary surveillance.
Who it is suitable for
Professional operators and observers who require a dependable working system without premium-tier pricing.
Reconnaissance teams, vehicle crews, and users operating in darkness or low-light environments.
Volunteers, security personnel, and private users who want high-quality Gen 3 White Phosphor performance without compromising image clarity.
Users upgrading from Gen 2+ who are seeking a noticeable increase in sensitivity and contrast.
Those who need a stable and durable field-ready system without the cost of contract-grade modifications.


