PRE OWNED SPERRY MARINE 879.50 SPERRY MARINE 879.50 ANEMOMETER DISPLAY

PRODUCT OVERVIEW

The Sperry Marine 879.50 (manufactured by DEIF/Malling) is a premium digital wind indicator designed for commercial maritime and offshore applications. It is the primary display unit for the 879 Wind Measuring System. By combining a digital speed readout with a high-intensity LED circle for direction, it provides navigators with instantaneous situational awareness. In the refurbished market, the Sperry-branded version is highly compatible with larger integrated bridge systems (IBS) and is prized for its "ruggedized" internal components.

TECHNICAL SPECIFICATIONS

Brand: Sperry Marine / DEIF Malling

Model: 879.50 (Indicator Unit)

Display: 36-segment Circular LED (Direction) + 3-digit 7-segment LED (Speed)

Input Interface: NMEA 0183 (MWV sentence) or Analog (from 879.3C sensor)

Output Interface: NMEA 0183 (RS-422) for VDR, Radar, and ECDIS

Accuracy: +/- 2.5° (Direction), +/- 0.5% (Speed)

Power Supply: 220V AC / 110V AC (Switchable internal transformer)

Dimensions: 144 x 144 mm (Standard DIN Cutout)

Environmental: IP52 Front / IP20 Rear

KEY FEATURES & APPLICATIONS

Dual Visualization: The outer LED ring shows the wind direction in 10° increments, while the center display provides numerical speed data in knots, m/s, or km/h.

Brightness Control: Features tactile Up/Down arrow keys on the front panel to adjust the LED intensity across 8 levels, critical for maintaining night vision on the bridge.

Integrated Bridge Compatibility: Specifically designed to work with Sperry Marine VisionMaster FT radars and ECDIS systems, providing critical environmental data for docking and maneuvering.

Masthead Synchronization: Can be used with both traditional vane/cup sensors (879.3C) and modern ultrasonic wind sensors via an interface box (WSI).

Master/Slave Flexibility: A single Sperry 879.50 can act as a master unit, providing data output to multiple slave repeaters (like the Ninglu IR761) across the vessel.

Industrial Durability: Unlike recreational wind sensors, the 879.50 is built with industrial-grade PCBs to handle the constant vibration of commercial engine rooms and heavy sea states.

TYPICAL CONDITION (USED/REFURBISHED)

Market Sourcing: Very common in Bhavnagar (Gujarat) yards, usually sourced from bulk carriers and tankers.

Testing Protocol: Refurbished units are tested for LED ring consistency (ensuring no segments are dead) and the stability of the 220V AC internal power supply.

Aesthetics: Sperry-branded units often feature the Sperry Marine logo on the front face, though the internals remain high-spec DEIF components.

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