IR Monster

ELF-FB20 (Jerry-FB 2.0) Night Vision and Thermal Fusion Binocular

£4,999.00 GBP

Taxes included. Free UK delivery. International shipping calculated at checkout.

Tube configuration £4,999.00 £7,199.00 £7,399.00 £7,699.00 £7,699.00 £7,999.00 £7,999.00 £7,999.00

The ELF-FB20 is a dual-spectrum binocular that combines analogue image intensification with a 640 × 512 thermal sensor. Jerry-FB 2.0 is the familiar market name for this platform; ELF-FB20 is the model shown on the supplied product literature.

Please allow approximately one week before dispatch. This covers configuration, tube installation where applicable, functional inspection, testing and order preparation. It is not a one-week delivery promise.

Tube configurations

Housing and 640 thermal core: Supplied without image intensifier tubes, for builds using your own compatible tube pair. Two tubes are required for analogue night vision and fusion operation.
NNVT6L GEN2+ White Phosphor - FOM 1600: A complete fusion binocular fitted with two NNVT6L white phosphor image intensifier tubes.
NNVT6L GEN2+ White Phosphor - FOM 1800: The NNVT6L white phosphor configuration with a FOM 1800 tube pair.
NNVT Gen 3 - FOM 1800: Two GaAs image intensifier tubes, available in green or white phosphor.
NNVT Gen 3 - FOM 2000: FOM 2000 GaAs image intensifier tubes, available in green or white phosphor.
NNVT7 GEN2+ White Phosphor - FOM 2100: A complete fusion binocular fitted with two NNVT7 white phosphor image intensifier tubes rated at FOM 2100.

Contact Kaelor Works to discuss a specific tube configuration before ordering.

Night vision and thermal fusion

Selectable image-intensified, thermal highlight and outline-fusion modes combine natural scene detail with heat-signature detection.

Technical specifications

Model: ELF-FB20.
Magnification: 1×.
Thermal detector: 640 × 512, 12 µm, uncooled VOx.
Thermal field of view: 24 × 20 degrees.
Night vision field of view: 40 degrees.
Compatible tube formats: 10160 and 11769.
Objective lens: 27 mm, manual focus from approximately 0.25 m to infinity.
Eye relief: 25 mm.
Interpupillary adjustment: 55-72 mm.
Dioptre adjustment: -4D to +2D.
Display: 1280 × 1024 OLED.
Integrated digital compass and GPS positioning.
High-light protection and individual-pod automatic power-off.
Power: external holder for two 18650 cells.
Manufacturer-stated runtime: up to 8 hours in fusion mode or 80 hours in night vision mode, depending on conditions.
Dimensions: approximately 105 × 110 × 87 mm.
Main-unit weight: approximately 530 g, depending on configuration.
Ingress protection: IP67.
Manufacturer-stated operating range: -40 to +50 degrees C.

Professional Assembly & QC

Every complete, tube-equipped configuration undergoes the following before dispatch:

Controlled-environment assembly and optical cleaning
Matched image intensifier tube pair
Nitrogen purging
Infinity focus and dioptre calibration
Individual binocular collimation using dedicated equipment
Complete system and functional testing

Product FAQ

UK delivery and dispatch

UK delivery is free. In-stock orders are normally dispatched within 1-2 working days. Any product-specific lead time shown on this page takes priority.

30-day returns

Returns can be requested within 30 days of delivery, subject to our Refund Policy. Please contact us before sending an item back.

Warranty and support

Kaelor Works provides a one-year warranty on all products, with practical support before and after purchase. Contact support@kaelorworks.co.uk if you need help.

International orders

Some night vision and thermal imaging products may be subject to destination, export or usage restrictions. International orders are reviewed before dispatch where required.