FJD Trion V4e Pro Mini RTK GNSS Receiver with Laser

The FJD Trion V4e Pro is a compact RTK GNSS receiver for professional centimetre-level positioning, surveying, mapping and stakeout. It combines multi-constellation GNSS, an integrated IMU and laser point targeting in a lightweight handheld receiver.

The V4e Pro is designed specifically for advanced pole-free coordinate collection with laser point targeting. Its enhanced IMU supports measurements at angles of up to approximately ±60°, allowing users to capture points that would be awkward, unsafe or impossible to occupy with a conventional survey pole.

It is intended for surveyors, construction professionals, engineers, GIS teams, utility contractors, agricultural users, forestry professionals and other field teams that need portable, high-accuracy coordinate collection.

Typical applications include topographic surveying, road surveys, construction measurements, utility mapping, asset collection, agricultural boundary mapping, forestry work, civil engineering, GIS data collection and integration with compatible FJD automation systems.

For many routine RTK measurements, mapping tasks and stakeout workflows, the V4e Pro can perform the role of a conventional rover in a smaller handheld format. A survey pole can still be preferable where a precisely defined antenna height, maximum repeatability or a specific regulated surveying procedure is required.

It can reduce the need for a total station in many open-sky coordinate collection tasks, particularly when measuring inaccessible points with the laser. It does not replace every total-station workflow, especially where satellite reception is unavailable, very high angular precision is required or observations must be made indoors.

The operator aims the visible laser at the required point. The receiver combines its GNSS position, IMU orientation and laser measurement to calculate the target coordinate without requiring the GNSS antenna to be placed directly above the point.

The V4e Pro is designed to support pole-free laser measurements at angles of up to approximately ±60°. Actual performance depends on correct operation, target visibility, satellite reception, RTK correction quality and the surrounding environment.

Under suitable RTK conditions, its specified GNSS accuracy is up to 0.8 cm + 1 ppm horizontally and 1.5 cm + 1 ppm vertically. Pole-free laser point accuracy can be approximately ±3.5 cm under the manufacturer’s stated conditions. Results may vary with distance, angle, satellite geometry, corrections and target quality.

Yes, an RTK correction source is normally required to achieve centimetre-level positioning. Corrections may be received from a compatible NTRIP network or another supported correction source. Without RTK corrections, standalone GNSS accuracy will be lower.

The receiver does not have an integrated internet modem or internal UHF radio. Internet-based RTK corrections are normally supplied through the connected phone or field controller. Confirm the intended correction workflow and required accessories before deployment.

The V4e Pro has 1,408 tracking channels and supports signals from major GNSS constellations, including GPS, GLONASS, Galileo, BeiDou, QZSS and SBAS. Multi-constellation tracking improves satellite availability and positioning reliability in many field environments.

Yes. Laser point targeting is useful for features such as walls, building corners, trench edges, embankments, fences and other points where placing a survey pole is difficult or unsafe. The laser still requires a clear line of sight to a suitable target surface.

The IMU detects the receiver’s orientation and enables compensated measurements when the unit is tilted. In the V4e Pro, it also contributes to the calculation of coordinates captured with the pole-free laser measurement function.

The specified startup time is up to 30 seconds from a cold start and up to five seconds from a hot start. RTK initialization may take less than five seconds when satellite visibility, correction data and communication conditions are suitable.

Yes. It can be used to navigate to and mark predefined coordinates. Its visible laser can assist the operator in identifying the target location during supported stakeout workflows.

Survey data can be transferred into compatible office, CAD, GIS and construction workflows using the export options available in the associated field software. Available formats and functions can depend on the software version and project configuration.

Yes. FJD describes a connected ecosystem in which compatible GNSS data can be used with FJD agricultural autosteering systems, robotic mowers and other smart equipment without unnecessary data conversion.

It can operate in many partially obstructed environments, but accuracy and RTK reliability may decrease when buildings, trees or machinery block satellites or reflect GNSS signals. Measurements should be checked carefully where the sky view is restricted.

The specified battery life is at least 12 hours, depending on operating conditions, wireless communication, laser use, temperature and battery condition.

The specified charging time is no more than approximately three hours when a suitable charger and cable are used. The receiver can also be powered from a compatible power bank during longer field sessions.

It has an IP67-rated enclosure, providing protection against dust and temporary water immersion under the conditions defined by the IP67 standard. Covers and connections must be closed correctly, and the receiver should not be treated as suitable for prolonged underwater use.

The V4e Pro is designed to withstand drops of up to approximately 1.2 metres under specified test conditions. A protective case and careful handling are still recommended because impacts can affect the housing, laser alignment or internal sensors.

A float solution can result from poor satellite visibility, interrupted correction data, excessive distance from the correction source, multipath reflections or an incorrect RTK configuration. Move to a clearer location, check the NTRIP or correction connection and wait for the solution to return to fixed before recording critical points.

Possible causes include an unstable RTK solution, an unsuitable or reflective target, excessive distance or angle, an obstructed laser path, poor IMU initialization or movement during capture. Verify the receiver status and test the result against a known point when accuracy is critical.