BWSENSING Dual Axis Wireless NB-Iot Inclinometer (NB-WL300)

Most structural movement is slow enough to be overlooked and costly enough to matter: a retaining wall that leans a little further each season, a pylon footing that settles after a wet winter, an embankment that creeps towards a railway line. The difficulty has rarely been measuring that drift. It has been getting the reading back from a site with no cable, no mains supply and nobody on hand to collect it. The BWSENSING Dual Axis Wireless NB-Iot Inclinometer (NB-WL300) tackles the problem from the other end. It pairs a dual-axis tilt sensor with a cellular link and solar charging, so the angle of a structure arrives on a cloud dashboard rather than in a technician's notebook.

Robots Europa, based in Dublin, supplies the NB-WL300 to customers throughout the European Union and the DACH region. We prepare each quotation for the project in hand. Once the sensors are installed, we remain your point of contact for delivery and technical support.

Background

Bewis Sensing and the BWSENSING brand

The NB-WL300 is made by Bewis Sensing Technology LLC, a company established in 2010 that describes itself as an innovative, fast-growing business. Since 2019 its products have carried BWSENSING as their global brand. The name now covers a broad family of inclinometers and tilt sensors, from wired digital-output units to the wireless NB-IoT models. The full line-up can be browsed in our BWSensing range. The NB-WL300 sits within that family as one of the models built for remote, unattended monitoring rather than for connection to a local controller.

Two network modes in one tilt sensor

BWSENSING presents the NB-WL300, together with its sibling the NB-WK100, as a highly cost-effective wireless tilt sensor that supports two network modes: NB-IoT and GSM. Structural data are uploaded to the cloud through NB-IoT or through the operator's 2G network. NB-IoT is a narrowband cellular technology designed for devices that send small amounts of data at intervals and need good coverage in difficult locations. It suits monitoring equipment that spends most of its life waiting for something to change. The 2G-GSM mode gives the sensor a second route to the cloud where NB-IoT is not available. Solar charging addresses the other constraint of remote sites, the absence of a power connection.

Technical Specifications

Specifications are given as published by the manufacturer and are confirmed against the datasheet at quotation.

The manufacturer has not published the measuring range, power supply, battery capacity, weight, dimensions, operating temperature, IP rating, zero temperature drift, output frequency or the contents of the box; all of these are confirmed at quotation.

How does the NB-WL300 differ from a wired inclinometer?

A conventional inclinometer is one component in a chain. It needs a cable for power and a cable or bus for data, and it relies on a logger, a controller or a gateway to collect its readings and pass them on. On a factory floor or inside a machine, that chain already exists. On a hillside, a bridge pier or a lattice tower, every metre of it has to be designed, installed and maintained.

The NB-WL300 removes most of that chain. Its readings travel over the public mobile network, using NB-IoT or the operator's 2G network, straight to the Customizable Monitoring Cloud System. The transmission distance therefore has no limit: the sensor does not need to be within reach of a local receiver. What matters instead is mobile coverage at the installation point. Solar charging removes the need for a power cable. The result is a sensor that can be fixed to a structure and left in place. The engineering effort shifts from running cables to choosing a mounting position with adequate sunlight and signal.

The trade-off is that a wireless sensor depends on the network it uses. Several European operators have been retiring their 2G services, so the network modes available at each site are worth reviewing with Robots Europa early in a project.

What do 0.1° accuracy and 0.0007° resolution mean in practice?

The two figures describe different things, and both matter for structural monitoring. Resolution is the smallest change in angle the sensor can register. At 0.0007°, the NB-WL300 can detect very small movements from one reading to the next, which is what reveals slow creep or settlement as a trend. Accuracy describes how close an individual reading is to the true angle. At 0.1°, it defines how far the absolute value can be trusted.

In many monitoring programmes the change since installation is more important than the absolute inclination. A fine resolution lets engineers see a structure begin to move long before the movement becomes visible. Dual-axis measurement adds direction: the sensor reports tilt along two perpendicular axes, so the data show which way a structure is leaning as well as by how much.

Who is the NB-WL300 for?

The NB-WL300 is aimed at organisations that must watch structures in places where wiring is impractical or uneconomic. Geotechnical engineers monitoring slopes, cuttings and embankments are an obvious fit, as are owners of linear infrastructure such as railways, roads, pipelines and power lines, whose assets stretch far beyond any local network. Structural monitoring contractors can deploy the sensors on temporary or long-term contracts without negotiating power connections. System integrators building monitoring services for municipalities or utilities will value the customisable cloud system as a basis for their own dashboards and alerts.

The sensor suits a different buyer less well. Where readings feed into a machine controller or a local PLC over a cabled bus, a wired inclinometer is usually the simpler choice. The BWSENSING Cost-Effective Dual-Axis Digital Output With Modbus Inclinometer (BWN427) is one dual-axis option of that kind, and the wider Sensors category lists further alternatives. Buyers comparing the NB-WL300 with its wireless siblings, the NB-WK100, NB-WM410 and NB-WS2000, can ask Robots Europa to set out the differences between them.

What is the NB-WL300 used for?

1. Slope and landslide monitoring: tracking gradual tilt on unstable hillsides and cuttings, where an early warning saves both cost and risk.
2. Embankments and earthworks: watching rail and road embankments for creep after heavy rainfall or nearby construction.
3. Retaining walls: recording the lean of walls that hold back soil over months and years of service.
4. Bridge piers and abutments: following the inclination of supports exposed to scour, settlement or traffic loading.
5. Towers, poles and masts: checking transmission towers, lighting columns and telecom masts on sites without mains power.
6. Buildings near excavation: observing neighbouring structures and heritage façades while deep excavation or tunnelling works proceed nearby.

Pricing and Availability

The NB-WL300 is supplied on quotation, so that the configuration, network modes and cloud set-up match the needs of your project. Delivery, customs and support are arranged with the quotation. If you are planning a monitoring network rather than a single installation, tell us the number of sites and their locations, and we will reflect that in our reply. To begin, a quotation request form is available on this page.

Frequently Asked Questions

How many axes does the NB-WL300 measure?

The NB-WL300 is a dual-axis inclinometer. It measures tilt along two perpendicular axes, so it reports both the direction and the extent of any lean.

Which networks does the NB-WL300 use?

It supports NB-IoT and 2G-GSM, and uploads structural data to the cloud through NB-IoT or the operator's 2G network. Mobile coverage at the installation site therefore matters when choosing a mounting point.

Does the sensor need a mains power supply?

The NB-WL300 uses solar charging, which suits sites without a power connection. This allows it to be installed on structures far from any mains supply.

How far can the NB-WL300 transmit its data?

There is no limit on transmission distance, because readings travel over the mobile network rather than to a local receiver. The practical requirement is mobile coverage where the sensor is mounted.

What accuracy and resolution does it offer?

The NB-WL300 has an accuracy of 0.1° and a resolution of 0.0007°. The fine resolution makes it well suited to detecting slow, small movements over time.

Can the monitoring software be adapted to our project?

The sensor works with BWSENSING's Customizable Monitoring Cloud System. Robots Europa can advise on tailoring it to your application.

Where can I buy the BWSENSING Dual Axis Wireless NB-Iot Inclinometer (NB-WL300) and what does it cost?

Robots Europa, based in Dublin, supplies the NB-WL300 across the European Union and the DACH region. The cost depends on quantity and configuration and is set out in a project-specific quotation, which you can request on this page.

Summary

The hard part of tilt monitoring has always been the distance between the structure and the person who needs the data. The NB-WL300 closes that gap. Dual-axis measurement with a resolution of 0.0007° picks up slow movement early. NB-IoT and 2G-GSM carry the readings without a cable, solar charging removes the need for a power line, and a customisable cloud system turns the data into something an engineer can act on. For slopes, walls, piers and towers that are too remote to visit often but too important to ignore, it offers a direct way to watch them continuously. Robots Europa supplies and supports it across the EU and the DACH region, and for a quotation tailored to your sites, this page is the starting point.