Meridian M25

Advanced IMU-RTK with Laser Surveying

Meridian M25 Laser GNSS RTK is an innovative solution that combines advanced laser technology with Camera, IMU, and 4G integration. It is calibration-free, significantly boosting operational efficiency and laser measuring makes the rodless survey improve efficiency and reduce risk factors. The M25 laser receiver provides a new way to work in challenging & impossible scenarios with high accuracy, including riverine stake-out, bridge pile surveying, elevation surveying, municipal surveying, and outdoor & indoor combination surveying.

Latest Laser Technology

Laser technology offers unparalleled advantages in precision positioning and makes surveying work rodless and Easier. Combining cutting-edge 100m laser technology with full constellation GNSS, IMU, and 4G integration, delivers calibration-free accuracy, significantly enhancing work efficiency and reducing potential risks.

AR Stakeout

Visual positioning eases point finding by overlaying design files onto real scenes, enhancing stakeout efficiency. A high-performance HD camera achieves high accuracy with precise signal tracking. The 360- degree AR stakeout seamlessly switches between the handheld controller and rover, ensuring fast and accurate stakeout experiences.

Calibration-Free Solution

Equipped with laser & 120° calibration-free IMU technology in a small body, it complements the laser’s outstanding performance, extending the M25’s application range to locations that traditional RTK systems cannot reach, opening up new horizons for product applications, enhancing customer satisfaction and boosting operational efficiency.

Longer Working Distance

Equipping the MeridianLink protocol internal radio offers a 15km working range and increases flexibility. By eliminating the need for an external radio, the M25 becomes more lightweight, less complex, and more portable, which can lead to increased efficiency and convenience in the field.

Full Constellations

Supports BDS, GPS, GLONASS, Galileo, QZSS, and SBAS. Its 1408 channels offer comprehensive GNSS signal tracking capabilities.

Technical Specification

GNSS Signal
Channel	1760
BDS	B1I，B2I，B3I，B1C，B2a，B2b*
GPS	L1 C/A，L1C*，L2P(Y)，L2C，L5
GLONASS	L1，L2，L3*
GALILEO	E1，E5a，E5b，E6*
QZSS	L1C/A, L1C, L2C, L5, L6*
SBAS	L1, L5*
NavIC(IRNSS)*	L5
L-band	B2b PPP (Only for the Asian-Pacific Region) & HAS*
Data Format
Format	CMR, CMR+, RTCM2.X, RTCM3.X
Output	NMEA-0183, RINEX, TXT
Data Updating Rate	Up to 20Hz
Time to Recapture	<1s
Cold Start	<40s
Positioning Performance
Single Point Positioning (RMS)	Horizontal: 1.5m \| Vertical: 3.0m
DGPS (RMS)	Horizontal: 0.4m \| Vertical: 0.8m
Real-Time Kinematic (RMS)	Horizontal: ±(8mm+1×1ppm) \| Vertical: ±(15mm+1×1ppm)
Speed Accuracy (RMS)	0.03m/s
Static Accuracy (RMS)	Horizontal: ± (2.5mm+0.5ppm) \| Vertical: ± (5mm+0.5ppm)
Time Accuracy (RMS)	20ns
Speed Accuracy	≥0.03m/s
Tilt Compensation Accuracy	≤2cm(Tilt Angle≤60°, Up to 120°)
IMU Update Frequency	200Hz
Laser Accuracy (RMS)	Horizontal: ±(8mm+3mm/m) \| Vertical: ±(15mm+3mm/m)
Laser Range	Supports 120-meter laser range with high-brightness laser technology
Communication
Bluetooth	SPP3.0+BLE5.0 @ Power=10mW
WiFi	802.11 a/b/g/n/ac@ Power max (EIRP)=17dBm
WebUI	View status, update firmware, configure operating modes, download data, etc.
Cellular	LTE FDD: B1/2/3/4/5/7/8/12/13/18/19/20/25/26/28 LTE TDD: B38/39/40/41
Storage	32GB
Internal Radio	TX & RX, Transmitting Power: 2W(33±1dBm) 1W(30±1dBm) Baud rate: 9600, 19200 Frequency: 410~470MHz, Channel Spacing: 12.5/25kHz Protocol: SOUTH19200, SOUTH9600, Trimtalk9600, TRANSEOT9600, HITARGET9600, HITARGET19200, SATEL, MeridianLink optional Data Only, Antenna Impedance 50Ohm
Battery
Specifications	7.2V，6600mAh Lithium-ion Rechargeable Battery
Operating Times	Laser RTK Rover: Up to 22 hours \| Static: Up to 40 hours
Charging	Support USB PD 12V/1.5A (Supports Quick Charging Adapter)
Environment
Operating Temperature	-40°C~+85°C
Storage Temperature	-55°C~+85°C
Anti-seismic	2m Pole Drop, 1.2m free drop onto Concrete
Dust & Waterproof	IP68
Data Formats
AR Camera	5MP Large viewing angle, supports live view stakeout
Laser Assisted Camera	5MP Supports laser aimingdisplay
Button	2
I/O Interface	1× USB type-C port; 1 × TNC antenna port; 1× SIM card slot; 1 × 5 pin LEMO port
Dimensions	133mm×133mm×84.5mm
Weight	≤749g