BWSENSING Modbus Dual Axis Inclinometer (BWH527)

A structure rarely announces that it is moving. A wind tower settling on its foundation, a bridge pier responding to scour or a dam face answering the load of its reservoir will all lean long before anyone standing beside them could notice, and the instrument that catches that lean has to be precise, rugged and easy to read from a distance. The BWSENSING Modbus Dual Axis Inclinometer (BWH527) meets that brief with a compact housing, two measuring axes and a Modbus output that connects directly to the data loggers, gateways and PLCs already running on most monitoring sites.

Robots Europa, based in Dublin, supplies the BWH527 to customers throughout the European Union and the DACH region. We prepare a quotation for each configuration, deliver the sensors to your site or to your integrator, and support them after installation, so that the interface variant you receive is exactly the one your controller expects.

Background

Wuxi Bewis Sensing Technology and the BWSENSING range

The BWH527 is made by Wuxi Bewis Sensing Technology LLC, a manufacturer based in Wuxi, Jiangsu, China, which sells its instruments under the BWSENSING name. Its catalogue concentrates on inclination and attitude sensing, and the inclinometers Robots Europa carries in the BWSensing category cover single-axis and dual-axis designs with digital, CAN and Modbus outputs. The BWH527 sits within that family as a dual-axis instrument whose output is built around the Modbus protocol from the outset rather than added as an option.

A small, low-cost instrument with an industrial protocol

The BWH527 is a low-cost, small Modbus-output dual-axis inclinometer, and that positioning explains its appeal. Modbus is one of the most widely understood protocols in industrial automation: almost every PLC, SCADA package and remote telemetry unit can poll a Modbus device without additional drivers. A tilt sensor that speaks it natively can therefore be added to an existing installation as just another node on the bus. Combined with a wide supply voltage range and an IP67 enclosure, this makes the BWH527 a practical choice where many measuring points must be fitted economically and left in place for years.

Technical Specifications

Specifications as published by the manufacturer; confirmed against the datasheet at quotation.

The manufacturer has not published the weight, the contents of the box, the operating humidity, the cross-axis error for this series or the Modbus register map; these are confirmed at quotation.

Which BWH527 version should I choose: RS485, RS232 or TTL?

The BWH527 is offered in three interface versions, and the choice depends on where the sensor sits relative to the system that reads it. The BWH527-30-485 uses RS485, the usual physical layer for Modbus in the field. RS485 is differential, tolerates electrical noise well and allows several devices to share one twisted pair, which suits monitoring arrays where a number of inclinometers are strung along a bridge deck, a dam gallery or a tower shaft and polled by a single logger.

The BWH527-30-232 uses RS232, a point-to-point link that remains common on older industrial computers, test benches and some data acquisition units. It is the simpler option when one sensor connects to one serial port over a short cable. The BWH527-30-TTL provides a logic-level serial output intended for direct connection to a microcontroller or embedded board, which makes it the natural candidate for OEMs building the inclinometer into their own electronics.

All three share the same measuring range and the same adjustable baud rate of 2400~115200, so the decision is about wiring and integration rather than measurement performance. If you are unsure which version your controller requires, Robots Europa will help you choose the right one when you request a quotation.

What makes the BWH527 suitable for long-term outdoor monitoring?

Structural and infrastructure monitoring asks a sensor to survive conditions that would retire laboratory instruments. The BWH527 is rated IP67, works from -40℃~+85℃ and can be stored between -55 and 100 ℃, which covers winter on an exposed tower as well as summer inside an unventilated enclosure. Its impact resistance of 2000g, 0.5ms, 3 times/axis addresses the knocks of transport and installation, and the MTBF of ≥90000 hours speaks to an instrument designed to stay in service rather than be replaced every season.

Power is the other practical concern. The 9-36V supply input accepts the voltages typically available from industrial power supplies and battery systems, and the no-load current of 30 mA typical keeps the load on solar-powered or battery-backed loggers modest. The adjustable output frequency, from 5 Hz up to 100 Hz, lets you match the data rate to the task: slow sampling for structural drift, faster updates for machinery that moves.

Who is the BWSENSING Modbus Dual Axis Inclinometer (BWH527) for?

The BWH527 is aimed first at structural health monitoring contractors and consultants who instrument bridges, dams and towers and need many reliable measuring points feeding a common Modbus network. Wind energy operators and service companies form a second group, using it to track tower tilt over the life of a turbine. Railway maintenance teams and equipment builders working on track geometry tools are a third, since railway gauge ruler levelling is one of its named applications.

Systems integrators and OEMs make up the remaining segment. For them, the TTL version simplifies embedding the sensor into a product, while the RS485 and RS232 versions fit control cabinets and test rigs. Where only one axis of tilt matters, the BWSENSING Cost-Effective Single-Axis Digital Output With Modbus Inclinometer (BWM417) may be the more economical choice; where the host network runs on CAN bus rather than Modbus, the BWSENSING Cost-Effective Single-Axis CAN Output Inclinometer (BWM415) is worth comparing. The wider selection is collected in our Sensors category.

What is the BWSENSING Modbus Dual Axis Inclinometer (BWH527) used for?

1. Wind tower tilt monitoring – tracking the inclination of turbine towers to detect foundation settlement or structural change.
2. Bridge monitoring – recording the tilt of piers, decks and bearings as part of a structural health monitoring system.
3. Dam monitoring – observing the inclination of dam sections and galleries as reservoir levels and seasons change.
4. Railway gauge ruler levelling – providing two-axis inclination data for track measurement and levelling tools.
5. Equipment and platform levelling – giving machines and platforms a digital reference for horizontal alignment.
6. Modbus network retrofits – adding tilt measurement to existing SCADA, PLC or telemetry installations without new protocols.

Pricing and Availability

Robots Europa supplies the BWH527 on quotation, which allows us to match the interface version, quantity and any project documentation to your requirements. Tell us which output you need, how many measuring points you are planning and where the sensors will be installed, and we will prepare an offer accordingly. Delivery, customs and support are arranged with the quotation. To begin, use the quotation request available on this page.

Frequently Asked Questions

What is the measuring range of the BWH527?

The BWH527 measures inclination over a range of ±30° on both axes. Its resolution is 0.0007° and its highest accuracy is 0.003°.

Which communication protocol does the BWH527 use?

The sensor outputs its data over the Modbus protocol. It is available with an RS485, RS232 or TTL interface, depending on the version ordered.

Can the BWH527 be installed outdoors?

Yes. It carries an IP67 protection level and operates from -40℃~+85℃, which suits exposed structures and outdoor enclosures.

What supply voltage does the BWH527 need?

It accepts a wide input of 9-36V, with a no-load current of 20 mA minimum, 30 mA typical and 40 mA maximum.

Can the data rate be adjusted?

Yes. The baud rate is adjustable from 2400 to 115200, and the output frequency is adjustable from 5 Hz up to 100 Hz.

How robust is the BWH527?

The BWH527 withstands impacts of 2000g, 0.5ms, 3 times/axis. Its MTBF is ≥90000 hours, which suits installations intended to run for many years.

Where can I buy the BWSENSING Modbus Dual Axis Inclinometer (BWH527) and what does it cost?

You can order the BWH527 from Robots Europa, which supplies customers across the EU and the DACH region. The cost depends on the version and quantity, so we provide it in a quotation prepared for your project.

Summary

Structures and machines betray their movement in fractions of a degree, and the value of a tilt sensor lies in catching that movement early and reporting it in a language the rest of the system understands. The BWH527 combines a ±30° dual-axis measurement with fine resolution, an IP67 housing, a wide supply range and a native Modbus output in RS485, RS232 or TTL form, making it straightforward to place many measuring points across a tower, bridge, dam or railway installation. Robots Europa supplies, delivers and supports it throughout the EU and the DACH region. For a quotation tailored to your monitoring project, this page is the starting point.