Garmin GNX21 Reman Instrument Display NMEA 2000 Compatible
Garmin GNX21 Reman Instrument Display NMEA 2000 Compatible — Product description
Upgrade your boat's helm with the Garmin GNX 21 remanufactured instrument display, a reliable NMEA 2000 powerhouse designed for clear, customizable data readout on the water. Whether you're racing a sailboat, cruising coastal waters, or chasing fish offshore, this compact unit delivers essential marine insights like depth, speed, and wind without draining your batteries.
Standout Features for Serious Boaters
The GNX 21 stands apart with its hybrid high-contrast display, blending oversized scalable digits—up to 36 mm tall—for instant readability in harsh conditions. The glass-bonded construction seals out moisture to prevent fogging, while the anti-glare lens ensures sharp views from dawn patrols to midnight watches.
- Versatile Viewing Options: Select from seven backlight colors or mix your own for personalized visibility that matches your eyes and environment.
- Tailored Profiles: Switch between five pre-set layouts optimized for sail or power vessels—single, dual, triple functions, gauges, or graphs—to spotlight wind angles, water depth, boat speed, or any of 50+ NMEA parameters.
- Hands-Free Convenience: Enable auto-scroll to cycle through screens at your preferred pace, keeping critical data rotating without lifting a finger.
- Battery-Friendly Design: Sips just 25 mA daytime (350 mW) or 400 mW at mid-backlight night levels, ideal for extended sails where every amp counts.
Built for Real-World Boating Demands
Imagine glancing at your helm during a tack and seeing wind shifts crystal-clear, or monitoring depth in shallow bays without squinting. The GNX 21's inverted black-background display with white or color digits cuts through sunlight glare, making it a go-to for competitive sailors and casual cruisers alike. Its dot-matrix section adds graphs for trends like speed-over-ground or true wind speed, helping you make smarter decisions on the fly.
For powerboaters, integrate it seamlessly into a glass helm setup using the flush or optional flat mount. IPX7 waterproofing shrugs off spray and submersion, and the wide temperature tolerance—from chilly -15°C to sweltering 70°C—keeps it performing in any climate.
Detailed Specifications
| Category | Specification |
|---|---|
| Dimensions | 110 x 115 x 30 mm (4.33" x 4.53" x 1.18") |
| Display Size | 3.3" x 2.4" (4.0" diagonal) |
| Display Type | Standard LCD, monochrome |
| Weight | 8 oz |
| Waterproof Rating | IPX7 |
| Mounting Options | Flat or Flush |
| Glass Bonded Display | Yes |
| Temperature Range | From -15°C to 70°C (5°F to 158°F) |
| Power Consumption | 0.35 W (day); 0.4 W (night) |
| NMEA 0183 Compatible | Yes |
| User Profiles | Yes |
| Auto-On | Yes |
Everything You Need for Quick Setup
Hit the water faster with a complete kit: the GNX 21 unit, trim snap cover, protective cover, flush mount hardware and gasket, NMEA 2000 T-connector and drop cable, plus straightforward installation guide. Compass-safe at 209 mm (8.25 in.), it slots into your network effortlessly for a clean, professional install.
Frequently Asked Questions
Is the Garmin GNX 21 suitable for sailboats?
Absolutely. Its ultra-low power draw makes it perfect for sailboats, allowing long passages without relying on engines or generators to recharge batteries.
Can I customize the display on the GNX 21?
Yes, with five user profiles, adjustable backlight colors, and auto-scroll, you can tailor it to show exactly the wind, depth, speed, or other data you need most.
How does the glass-bonded display benefit marine use?
It eliminates fogging from temperature changes and humidity, while the anti-glare coating boosts readability in bright sunlight or low light.
What data parameters does the GNX 21 support?
Over 50 marine parameters via NMEA 2000, including depth, speed through water, apparent/true wind, and more, displayed in digits, gauges, or graphs.
Is the GNX 21 easy to install on my boat?
Yes, it offers flush or flat mounting options and includes all necessary NMEA 2000 cables and hardware for a straightforward drop-in setup.
Does it work with NMEA 0183 devices?
It supports NMEA 0183 compatibility alongside NMEA 2000, bridging older and newer sensors seamlessly.
What's the power efficiency like at night?
At mid-level backlight, it uses only 400 mW, keeping your house bank happy during overnight anchoring or racing.
Garmin GNX21 Instrument Display NMEA 2000 Compatible- Remanufactured
Model: 010-N1142-10- Easy-to-read Display - Unique high-contrast hybrid display features large, easy-to-read digits scalable up to 36 mm tall. Offers excellent clarity in direct sunlight, at dusk, or at night. The dot-matrix section can show additional details and/or graphical information.
- Glass-bonded Display - Glass-bonded display helps prevent fogging, and the anti-glare lens finish increases visibility.
- Customizable Color Digits - Choose from 7 different backlight colors, or even create a customized color, to achieve the screen that provides optimum readability for you.
- Customizable User Profiles - Fully customizable user profiles allow you to choose from 5 available display configurations for sailboat or powerboat user-profiles: single, dual and triple function, plus gauge and graph mode to display wind, depth and speed data, or customize the pages to display the marine and boat data that is most important to you.
- Auto Scroll - Set your display to automatically cycle between pages at a speed you set for convenient, hands-free operation.
- Low Power Consumption - Perfect for sailors who want to sail for long intervals without having to run a motor or generator to charge batteries. The GNX 21 uses only 25 mA with 350 mW daytime usage, requiring no backlight and just 400 mW with a mid-level backlight setting at night.
The easy-to-read GNX 21 marine instrument has an inverted display with white or color digits on a black background that clearly shows depth, speed, wind and 50-plus marine and boat parameters. Its glass-bonded display with anti-glare lens coating provides excellent daytime and nighttime readability with high-contrast digits scalable up to 36 mm.
The GNX 21 is the first glass-bonded marine instrument with a combination of directly driven LCD segments and a dot-matrix field to display graphical information. Its low power consumption - (25 mA) with 350 mW (no backlight)/400 mW (mid-level backlight) - is perfect for use on sailboats, and provides a valuable instrument for cruising and fishing. Fully customizable user profiles display wind, depth and speed data. Plus, the GNX 21 includes an auto-scroll feature that rotates through data screens for hands-free operation. It can be installed with the included low profile flush mount or an optional flat mount for the ultimate glass helm solution and custom look for your boat.
Specifications| General | |
| DIMENSION | 110 x 115 x 30 mm (4.33"" x 4.53"" x 1.18"") |
| DISPLAY SIZE | 3.3" x 2.4"; 4.0" diagonal |
| DISPLAY TYPE | Standard LCD, monochrome |
| WEIGHT | 8 oz |
| WATERPROOF | IPX7 |
| MOUNTING OPTIONS | Flat or Flush |
| GLASS BONDED DISPLAY | Yes |
| TEMPERATURE RANGE | From 5° to 158°F (from -15° to 70°C) |
| Sensors | |
| NMEA 0183 COMPATIBLE | Yes |
| Electrical Features | |
| POWER CONSUMPTION | 0.35 W (day); 0.4 W (night) |
| COMPASS-SAFE DISTANCE | 209 mm (8.25 in.) |
| Instrument Features | |
| AUTO-ON | Yes |
| USER PROFILES | Yes |
What's in the Box:
- GNX 20
- Trim piece snap cover
- Protective cover
- Flush mount gasket and hardware
- NMEA 2000® T-connector
- NMEA 2000 drop cable
- Installation instructions
- Documentation
SKU: NVN-1003355
MPN: 010-N1142-10
UPC:
Technical specifications
| Brand | Garmin |
| Model | Garmin GNX21 Reman Instrument Display NMEA 2000 Compatible |
| SKU / MFR# | 1003355 |
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