BWSENSING Cost-Effective Single-Axis Digital Output With Modbus Inclinometer (BWM417)

An angle is only worth measuring if the system downstream can act on it. A tracker controller, a tower monitoring logger or a machine PLC is indifferent to how elegant a sensor's internals are; what matters is whether the reading arrives in a format the controller already understands, at a rate it can use, from a housing that survives the site. The BWSENSING Cost-Effective Single-Axis Digital Output With Modbus Inclinometer (BWM417) is built around that practical question. It measures tilt about one axis across the full circle and delivers the result digitally, with Modbus communication named in its designation and a choice of RS232, RS485 or TTL interfaces to match the equipment at the other end of the cable.

Robots Europa, based in Dublin, supplies the BWM417 to customers throughout the European Union and the DACH region. We prepare quotations for single units and for project quantities, help you select the interface version your installation requires, and remain your point of contact for delivery and technical support once the sensor is in service.

Background

Wuxi Bewis Sensing Technology and the BWSENSING range

The BWM417 is manufactured by Wuxi Bewis Sensing Technology LLC, based in Wuxi City, Jiangsu Province, China, and sold under the BWSENSING brand. The range is organised as a family of related inclinometers that differ chiefly in the number of measuring axes and the type of output, so that an integrator can select the variant closest to the application instead of adapting a general-purpose device. Within that family the BWM417 is the single-axis model with digital output and Modbus, standing alongside dual-axis models and a single-axis variant with CAN output. The complete line-up is gathered on our BWSensing page, and related measurement products from other manufacturers are listed under Sensors.

Single-axis measurement with a digital, Modbus-ready output

A single-axis inclinometer is the natural choice wherever the movement of interest takes place in one plane: the lean of a mast, the elevation of a boom, the rotation of a solar tracker row or the pitch of a platform. Restricting the measurement to one axis keeps configuration and data handling simple, and the full ±180° range means the sensor continues to report meaningfully even when the monitored object rotates well beyond a few degrees of slope.

The output is the second half of the design. Digital transmission generally avoids the signal degradation and calibration drift that analogue outputs can suffer over long cable runs, and Modbus is one of the most widely supported protocols in industrial automation, understood by most PLCs, data loggers and SCADA systems. The three interface options address different integration settings: RS485 is the usual choice for industrial networks and longer cable runs, RS232 suits point-to-point links with existing instrumentation, and TTL lends itself to direct connection with embedded electronics and microcontroller boards.

Technical Specifications

Specifications are as published by the manufacturer and are confirmed against the datasheet at quotation. The manufacturer has not published the weight, the baud rate options, the package contents or the data register map; these details are confirmed at quotation.

Which BWM417 version suits my controller: RS485, RS232 or TTL?

The measuring performance is identical across the three versions: each covers ±180° with a resolution of 0.001° and a highest accuracy of 0.01°. The choice therefore rests entirely on the equipment the sensor must talk to. If the inclinometer joins an industrial network with other field devices, or if the cable between sensor and controller is long, the RS485 version is normally the sensible starting point, and it is the interface most commonly paired with Modbus in the field. Where the sensor will be connected to a single existing instrument, a legacy controller or a computer serial port, RS232 keeps the link straightforward. For product developers embedding the sensor into their own electronics, the TTL version removes the need for an additional level converter between the inclinometer and a microcontroller.

Because the output frequency is adjustable from 5Hz up to 100Hz, the same sensor can feed a slow monitoring logger, which only needs occasional readings, or a control loop that reacts to movement as it happens. When you request a quotation, tell us which controller or network the sensor will join and Robots Europa will identify the matching version.

Is the BWM417 rugged enough for outdoor and machine-mounted installations?

Inclinometers rarely live in clean, sheltered conditions. They are bolted to towers exposed to rain, mounted on tracker frames in dust and heat, or fixed to machinery that vibrates and jolts throughout a shift. The BWM417 carries an IP67 protection level, which addresses dust ingress and temporary immersion, and an impact resistance of 2000g, 0.5ms, 3 times/axis, which speaks to its ability to tolerate mechanical shock during installation and operation.

The wide 9-35V power supply range is equally relevant in practice. It allows the sensor to draw power from the supply rails commonly found in industrial cabinets and on vehicle or machine electrical systems without a dedicated regulator in many installations. With a compact housing of L90*W40.5*H26 (mm), the sensor also fits into the confined mounting positions typical of masts, brackets and machine frames.

Who is the BWM417 for?

The first group is system integrators building monitoring and control systems around a PLC or data logger. For them, a Modbus-capable tilt sensor slots into existing architecture with minimal custom software, and the adjustable output rate lets them balance data volume against responsiveness.

The second group is engineering firms responsible for structural and asset monitoring, such as telecommunications towers, utility poles and civil structures, where the concern is gradual lean over months rather than rapid motion. The fine resolution makes small changes visible, and the sealed housing suits long-term outdoor deployment.

The third group is machine builders and OEM developers who need angle feedback for booms, platforms and trackers. Those integrating the sensor into their own electronic boards will find the TTL version especially convenient.

Some buyers will be better served by a sibling model. Where the application must capture tilt in two directions at once, for example levelling a platform in both pitch and roll, the BWSENSING Cost-Effective Dual-Axis Digital Output With Modbus Inclinometer (BWN427) keeps the Modbus approach while adding a second axis. Where the host system is built around a CAN bus, as is common on mobile machinery, the BWSENSING Cost-Effective Single-Axis CAN Output Inclinometer (BWM415) is the more direct fit.

What is the BWM417 used for?

1. Tower and pole monitoring: tracking the lean of telecommunications masts, transmission towers and lighting poles over time.
2. Photovoltaic tracking: reporting the rotation angle of solar tracker rows so the controller can follow the sun accurately.
3. Lifting and construction machinery: measuring boom or arm angle as an input to operator displays and safety systems.
4. Platform levelling: providing angle feedback for levelling routines on work platforms, antenna mounts and equipment bases.
5. Surveying and instrumentation: supplying a stable digital tilt reference within measuring instruments and test rigs.
6. Structural and civil monitoring: detecting rotation of retaining walls, bridge elements and foundations as part of a wider sensor network.

Pricing and Availability

Robots Europa supplies the BWM417 on a quotation basis, so that each offer reflects the interface version, the quantity and the destination of your project. When you request a quotation, please state whether you require the RS485, RS232 or TTL version and describe the controller or network the sensor will connect to; we then supply the outstanding datasheet details with our offer. Delivery, customs and support are arranged together with the quotation. To begin, the quotation request form for the BWM417 is available on this page.

Frequently Asked Questions

What measurement range does the BWM417 cover?

The BWM417 measures inclination across a range of ±180° about its single axis. This allows it to report the full rotation of the monitored object rather than only small slopes.

How fine are the readings?

The sensor has a resolution of 0.001° and a highest accuracy of 0.01°. This makes it suitable for detecting slow, small changes in angle as well as larger movements.

Does the BWM417 communicate via Modbus?

Yes, Modbus communication is part of this model's designation. The manufacturer has not published the data register map, so please mention it in your quotation request.

Can the output rate be adjusted?

Yes, the output frequency is adjustable between 5Hz and 100Hz. Lower rates suit long-term monitoring, while higher rates suit control applications.

What power supply does the sensor require?

The BWM417 operates from a power supply of 9-35V. This range covers the supply rails commonly available in industrial cabinets and on machinery.

Is the BWM417 suitable for outdoor installation?

The sensor has an IP67 protection level and an impact resistance of 2000g, 0.5ms, 3 times/axis. These properties make it well suited to exposed sites and machine-mounted positions.

Where can I buy the BWM417 and what does it cost?

You can buy the BWM417 from Robots Europa, which supplies customers across the EU and the DACH region from Dublin. The cost depends on the version and quantity, so we provide it in a quotation that you can request on this page.

Summary

A tilt sensor earns its place in a project when its reading flows straight into the system that has to act on it. The BWM417 approaches that task with a full ±180° single-axis range, fine resolution, an adjustable output rate and Modbus communication over a choice of RS485, RS232 or TTL, all packaged in a compact IP67 housing that tolerates shock and a wide supply voltage. For integrators, monitoring specialists and machine builders, that combination means less effort translating data and more confidence in the installation. Whether you are equipping a single tower or a complete tracker field, this page is the starting point.