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Bad Elf Flex - GNSS Receiver


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Bad Elf Flex democratises GNSS and economises field data collection.

Customers shared their needs for lower cost GNSS solutions that include full RTK rover workflow. With introductory pricing, Bad Elf Flex delivers, with 30-60cm accuracy all day, every day. But wait, there's more!

Bad Elf Flex
Need higher accuracy? No problem! Bad Elf Flex tokens provide a per day rate for features that typically cost thousands of pounds - and every Bad Elf Flex unit includes a free starter pack for you. This daily rate includes full access to both an unlocked RTK workflow and the Atlas L-Band correction service. Bad Elf Flex is the first GNSS receiver to have a daily choice with unlimited switching between L-Band and RTK.

The Bad Elf Flex delivers customers a comparative advantage in a total geospatial solution. A single GNSS receiver removes the need for deploying multiple devices in the field. Surveyors and their crews now have a scalable accuracy, survey-grade receiver. GIS managers focus on flexible field choices for work crews with varying skill levels. Businesses obtain operational and financial efficiencies. Bad Elf Flex effectively offers you several products in one package through flexible software and configuration. Some have even said it is Engineered Magic!

In SBAS-enabled regions, Bad Elf Flex achieves 30cm - 60cm accuracy sufficient for sub-meter GIS use. Simply pair the receiver with your tablet or phone and all location-aware apps become sub-meter capable. No additional software or special configuration required.
- Daily cost - none
- Training - none

Do you collect data in areas without cellular coverage? Bad Elf Flex is capable of operating anywhere in the world using L-Band satellite-delivered corrections. Using Atlas1 provides accuracy down to 5 cm RMS in many situations. One can expect typical convergence times of 10 - 40 minutes.

If you require an RTK survey-grade rover for use more than 30 to 40 days a year, consider the Extreme bundle. Purchase at time of sale or after without any penalty. The Bad Elf Flex Extreme bundle includes the following unlocked services:
- Daily cost - none
- Fully unlocked RTK engine
- Multiple-constellation enabled
- Multiple-frequency enabled

Bad Elf Flex Tokens are stored on your Bad Elf Flex and available for use anytime and anywhere. Just load your Flex with tokens sufficient for the number of days you plan to work remotely. You can purchase Bad Elf Flex Tokens directly through the Bad Elf Flex app on iOS or Android, or online from bad-elf.com. Bad Elf Flex Tokens don't expire and remain on your receiver until you use them. Each Bad Elf Flex Token is good for a 24-hour period from your first position lock. Ready for maximum flexibility? Bad Elf Flex is the only GNSS receiver to provide daily options for high accuracy. With one Bad Elf Flex Token, you can freely switch between these options:
- Unlock multi-constellation and multi-frequency for higher accurcacy SBAS
- Use RTK with your local CORS or VRS network for centimeter level results
- Use L-Band satellite corrections for places you don't have a data connection or SBAS availability

Bad Elf Flex delivers 30-60cm1 accuracy without any additional subscription or cost. Compatible with phones or tablets for use in GIS, mapping, agriculture, and survey data collection.
On-demand data logging includes:
- Raw data loging in RINEX format for post-processing
- NMEA logging in standard NMEA 0183 format
- Available standalone or through the Bad Elf Flex app


Customers spoke and they listened. The modern paradigm for field data collection must address the needs of the competitive business. Surveyors and their crews now have a scalable survey-grade receiver. GIS managers can focus on flexible field choices for work crews with varying skill levels.

Financially speaking, Bad Elf Flex solves the following business considerations:
Acquisition of GNSS hardware is expensed versus capitalized
One set of hardware for field crews requiring minimal training
Other services and subscriptions can be expensed to operational budgets or projects
Looking to learn more about using the Bad Elf Flex for GIS? See our GIS Resources for detailed infromation and advanced usage.

Fully compatible with Android, iOS and Windows location-aware apps3. The Bad Elf Flex meets all requirements under Apple's MFi program, and works great with any location-based app in the App Store.


Positioning Performance
Horizontal accuracy - RTK: 1 cm
Horizontal accuracy - SBAS (WAAS): 30-60 cm
Horizontal accuracy - Autonomous: 1.2 m
Horizontal accuracy - L-Band via Atlas: 4 cm
Timing (1PPS) accuracy: 20 ns
Cold start time: < 60 s typical (no almanac or RTC)
Warm start time: < 30 s typical (almanac and RTC)
Hot start time: < 10 s (almanac, RTC, and position)
Maximum speed: 1,850 kph (999 kts)
Maximum altitude: 18,288 m (60,000 ft)
Differential options: SBAS, Autonomous, External RTCM v2.3, RTK v3, L-band (Atlas), and DGPS
Correction I/O protocol: Hemisphere GNSS' ROX, RTCM v2.3 (DGPS), RTCMv3 (RTK),
CMR, CMR+, Atlas

USB: USB 2.0 device via Mini-USB receptacle
USB 2.0 host OTG via supplied adapter
Bluetooth: Bluetooth V4.0 (HS) with integrated Class 1.5 PA
Supports 3 simultaneous connections
Wi-Fi: 802.11b/g/n

Platforms: iOS, Android, Windows
Mobile App: The Bad Elf Flex App requires iOS 9.0+ or Android 9+
Connectivity: Bluetooth SPP, USB Serial

Operating Specifications
Operating: -4°F to +131°F (-20°C to +55°C)
Battery Powered: -14°F to -140°F (-10°C to +60°C)
Externally Powered: -22°F to +140°F (-30°C to +60°C)
Charging Temp: 41°F to +113°F (+5°C to +45°C)
Storage Temp: -40°F to +167°F (-40°C to +75°C)

Battery specifications
Full RTK: 11 hours
L-band Atlas: 8 hours

Mechanical Specifications
User interface: Transflective LCD / Membrane Buttons / 3 multicolor LEDs / Audible tones
Dimensions: 10.0" x 2.75" / 254mm x 70mm
Weight: 29oz / 854g
Helical Antenna Phase Center: 23cm above base of Flex unit without adapter installed
Add 1.5cm with adapter installed

Environmental Specifications
Humidity: 100% condensing
Waterproof: IP65

Product Specifications
USB Port: Mini-USB port for charging and ElfPort expansion
Accelerometer: 3-axis
Display: 400 x 240 pixel transflective LCD screen with backlight
Firmware: Field upgradeable via app or USB

Package contents
Package Contents
BE-GPS-5500 Flex receiver
3ft (90cm) Mini-USB cable for charging
12-24V DC vehicle USB charger
Wall adapter
Accessory case
Rugged waterproof case
5/8" x 11 to 1/4" x 20 adapater
User's Manual
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We are an EASA part 145 approved organisation. Our policy is to sell only high quality products which offer good value for money. If you are not completely satisfied with your purchase please return the goods in original condition and packaging within 28 days of purchase for replacement, exchange, or a full no quibble refund.

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If you have any questions regarding this product or any of our other services please email Customer Services or call us on 0131 447 7777 and we will be happy to assist.