BW SENSING BWM466 Series User manual

Technical Manual
BWM466 Series
Digital Dual Axis Inclinometer
V3.0

Bewis Sensing Technology LLC www.bwsensing.com Tel：[phone]
BWM466
Digital Dual Axis Inclinometer
Application
BWM466 is a cost-effective digital dual-axis inclinometer launched by Bewis Sensing
Company. The output mode is RS485 and TTL optional. It can be used vertically or horizontally.
The product adopts the latest technology micro-electromechanical production technology
inclination unit, small size, low power consumption, high consistency and stability, because it is
a digital inclinometer, the linearity is easier to be corrected. The working temperature reaches
industrial level -40℃～+85℃, it is a very cost-effective inclinometer.
When multiple sections are used in cascade, our company provides a multi-section
inclinometer algorithm, which can achieve accurate displacement measurement of larger
length and deeper depth, and provides an automatic calibration algorithm.
●Dual axis inclination measurement
●Range：±90°
●Highest accuracy：0.005°
●Wide voltage input：9～35V
●Output：RS485/TTL optional
●Can be cascaded for multiple sections
●Wide temperature work : -40℃～+85℃
●High vibration resistance >2000g
●Resolution：0.001°
●PCBA size：67×20×8mm
Introduction
●Foundation pit monitoring
●Soil monitoring
●Dam tailings monitoring
●Exploration well
●Slope monitoring
●High-speed rail foundation monitoring
●Piling monitoring
●Deep displacement
Main Feature

Bewis Sensing Technology LLC www.bwsensing.com Tel：[phone]
BWM466
Digital Dual Axis Inclinometer
Parameter Condition Minimum Typical Maximum
Power voltage (V) 9 12 35
Working current(mA) No load 20 30 40
Operating Temperature (℃) -40 25 85
Storage Temperature (℃) -55 25 100
Measurement Range (°) Condition ±90
Measurement axis X-Y
Accuracy (°) Room temperature 0.005
Resolution (°) Completely still 0.001
Zero bias (°/℃) -40~85℃±0.001
Start-up time ＜3s
Output frequency (Hz) 5-100Hz adjustable Up to 100
Mean time between failures
MTBF ≥90000 h/times
Electromagnetic compatibility According to GBT17626
Insulation resistance ≥100 MΩ
Impact resistance 2000g，0.5ms，3 times/axis
Resolution: The smallest change value of the measured value that the sensor can detect and
distinguish within the measurement range.
Accuracy: The root mean square error of the actual angle and the sensor measuring angle for
multiple (≥16 times) measurements.
Performance Index
Electric Index
Product Feature

Bewis Sensing Technology LLC www.bwsensing.com Tel：[phone]
BWM466
Digital Dual Axis Inclinometer
Connector
Cable hole
Protection level PCBA
Shell material PCBA
Installation Four M2 screws
Mechanical Index
Product size：L67*W20*H8（mm）
Package product size
PCBA

Bewis Sensing Technology LLC www.bwsensing.com Tel：[phone]
BWM466
Digital Dual Axis Inclinometer
Wiring definition
Wire color
function
RED BLUE BLACK GREEN YELLOW
12345
VCC
DC 9-35V NC GND ground
B
485-
A
485+
Note: P1 and P2 correspond to the same number and
the wiring is the same, and the RX and TX of P3 are the
receiving and transmitting ends of TTL.
When RS485 is selected, it can be connected to VCC
(9~35V), GND, AH (485+), BL (485-) of P1 or P2;
When TTL is selected, connect P1 or P2's VCC (9~35V),
GND, and P3's RX, TX, the TX (transmitting end) of the
acquisition end is connected to the RX (receiving end) of
the sensor P3, and the RX (receiving end) of the
acquisition
end is connected to the sensor TX
(transmitting end) of P3.
Electrical Interface
485+
485-
RS 485 wiring diagram
SensorSensor
RREEDD VVCCCC DDCC99--3355VV
BBLLAACCK K GGNNDD GGNNDD
11
33
44
55
GGRREEEEN N DD--
InclinometerInclinometer SignalSignal 6666
2222
acquisitionacquisition
endend
YELLOWYELLOW D+D+
BBLLAACCK K GGNNDD
TTL wiring diagram
SensorSensor
RREEDD VVCCCC DDCC99--3355VV
GGNNDD
11
33
44
55
GGRREEEEN N DD--
InclinometerInclinometer SignalSignal 6666
2222
acquisitionacquisition
endend
YELLOWYELLOW D+D+

Bewis Sensing Technology LLC www.bwsensing.com Tel：[phone]
BWM466
Digital Dual Axis Inclinometer
You can download the serial debugging assistant directly on the official website (technical
service -> download area), or you can use the more convenient and intuitive host
computer software.
BWM466 supporting serial port debugging software can connect the inclination sensor
on the computer to display the angle. The software debugging interface is shown in the
figure below. Using the tilt angle to debug the host computer, you can conveniently
display the current X direction and Y direction tilt angle, and you can also modify and set
other parameters.
Step：
①Connect the serial port hardware of the inclinometer correctly, and connect the power
supply.
②Select computer serial port and baud rate and click connect serial port.
③Click start button and the current inclination Angle of the incliner in X and Y directions
will be displayed on the screen.
Debugging Software

Bewis Sensing Technology LLC www.bwsensing.com Tel：[phone]
BWM466
Digital Dual Axis Inclinometer
Model Communication mode
Package situation
BWM466-90-485 RS485 PCBA
BWM466-90-TTL TTL PCBA
●Enterprise Quality System Standard: ISO9001:2015 Standard (Certificate
No.064-21-Q-3290-RO-S)
●CE certification (certificate number: M.2019.103. U Y1151)
●ROHS (certificate Number: G 190930099)
●GB/T 191 SJ 20873-2003 General specification for inclinometer and level
●GBT 18459-2001 The calculation method of the main static performance index of
the sensor
●JJF 1059.1-2012 Evaluation and expression of measurement uncertainty
●GBT 14412-2005 Mechanical vibration and shock Mechanical installation of
accelerometer
●GJB 450A-2004 General requirements for equipment reliability
●GJB 909A Quality control of key parts and important parts
●GJB899 Reliability appraisal and acceptance test
●GJB150-3A High temperature test
●GJB150-4A Low temperature test
●GJB150-8A Rain test
●GJB150-12A Sand and dust experiment
●GJB150-16A Vibration test
●GJB150-18A Impact test
●GJB150-23A Tilt and rock test
●GB/T 17626-3A Radio frequency electromagnetic field radiation immunity test
●GB/T 17626-5A Surge (impact) immunity test
●GB/T 17626-8A Power frequency magnetic field immunity test
●GB/T 17626-11A Immunity to voltage dips, short-term interruptions and voltage
changes
Order information
Executive standard

Wuxi Bewis Sensing Technology LLC
Add：Building 30, NO. 58, Xiuxi Road, Binhu District,
Wuxi City, Jiangsu Province, China
Tel：[phone]
Mail：[email protected]
Web：www.bwsensing.com
BWM466 Series
Digital Dual Axis Inclinometer