NEW VERSION
There is a new version of this product available. The product on this page has been discontinued and the datasheet and manual are provided for informational purposes.
Product no longer stocked – limited availability
Contact for pricing and lead time--a minimum order quantity may apply
Contact for pricing and lead time--a minimum order quantity may apply
The Torque-Link-LXRS® is a specialized analog sensor node designed to fit over rotating shafts for wireless strain and torque measurements.
Product Highlights
- One or two differential analog input channels designed for full-bridge strain gauge integration
- Ideal for static and dynamic torque measurements with full temperature compensation and bending cancellation
- Rugged ABS housing designed for remote, long-term installation on cylindrical shafts
- Wireless data transmission allows installation on rotating components without a slip ring
- Standard and custom diameters available
- User-programmable sample rates up to 4096 Hz
Wireless Simplicity, Hardwired Reliability
High Performance
- Lossless data throughput and sensor-to-sensor sampling synchronization of ±32 μS in LXRS-enabled modes
Ease of Use
- Wireless framework reduces installation complexity
- Installs over existing strain elements and shafts with no mechanical modifications
- Configurable housing geometry will accommodate any shaft size
- Low power consumption allows extended use
- Remotely configure sensors, acquire, and view sensor data with Node Commander®
| General | |
|---|---|
|
Sensor input channels |
Differential analog, 1 channel (standard), 2 channels (optional) |
|
Integrated sensors |
Internal temperature, 1 channel |
|
Data storage capacity |
2 M bytes (up to data points) |
| Analog Input Channels | |
|
Measurement range |
Differential: full-bridge, ≥ 350 Ω |
|
Accuracy |
± 0.1% full scale typical |
|
Anti-aliasing filter bandwidth |
Single-pole Butterworth -3 dB cutoff @ 500 Hz |
|
Bridge excitation voltage |
+ 3 V dc (pulsed @ sample rates ≤ 16 Hz to conserve power) |
|
Measurement gain and offset |
User-selectable in software on differential channels, gain values from 20 to 2560 |
| Integrated Temperature Channel | |
|
Measurement range |
-40 °C to 85 °C, ± 2 °C (at 25 °C) typical |
|
Resolution |
12 bit |
| Sampling | |
|
Sampling modes |
Synchronized, low duty cycle, datalogging |
|
Sampling rates |
Continuous sampling: 1 sample/hour to 512 Hz Periodic burst sampling: 32 Hz to 4096 Hz Datalogging: 32 Hz to 4096 Hz |
|
Sample rate stability |
±3 ppm |
|
Network capacity |
Up to 2000 nodes per RF channel (and per gateway) depending on the number of active channels and sampling settings. Refer to the system bandwidth calculator: http://www.microstrain.com/configure-your-system |
|
Synchronization between nodes |
± 32 μsec |
| Operating Parameters | |
|
Wireless communication range |
100 m (typical) |
|
Radio frequency (RF) transceiver carrier |
2.405 to 2.470 GHz direct sequence spread spectrum over 14 channels, license free worldwide, radiated power programmable from 0 dBm (1 mW) to 16 dBm (39 mW); low power option available for use outside the U.S.- limited to 10dBm (10mW) |
|
RF communication protocol |
IEEE 802.15.4 |
|
Power source |
Replaceable, non-rechargable battery pack (3.0 V dc, 1.2 Ah Li/MnO2 batteries in series configuration) |
|
Power consumption |
1 to 25 mA (configuration dependent) |
|
Operating temperature |
-20 ˚C to + 80 ˚C |
|
Angular acceleration limit |
500 g standard (high g option available) |
|
Maximum RPM |
2500 to 4200 RPM (diameter dependent, high RPM option available) |
| Physical Specifications | |
|
Dimensions |
Height 88.9 mm (3.5 inches), ID varies for use on 50.8 to 152.4 mm (2 to 6 inch) diameter shafts (custom sizes available) |
|
Weight |
200 to 525 grams (0.44 to 1.16 lb), depending on size |
|
Environmental rating |
IP66, tested to DO-160 standards for temperature variation, humidity, and vibration |
|
Enclosure material |
ABS thermoplastic |
| Integration | |
|
Compatible gateways |
All WSDA® base stations and gateways |
|
Compatible sensors |
Bridge type analog sensors |
|
Connectors |
Strain gauge and battery interface connectors |
|
Shunt calibration |
Internal shunt calibration resistor 499 KΩ |
|
Software |
SensorCloud™, Node Commander®, Windows 7 (or newer) |
|
Software development |
Open-source MicroStrain Communications Library (MSCL) with sample code available in C++,Python,and.NET formats (OS and computing platform independent): http://lord-microstrain.github.io/MSCL/ |
|
Regulatory compliance |
FCC (U.S.), IC (Canada), ROHS |
What is Multipath?
Multipath is the phenomenon whereby a radio signal arrives at a receiver’s antenna by more than one path. This occurs by the reflection, diffraction, or scattering of radio waves from atmospheric ducting, reflection from water bodies or terrestrial objects (like mountains), etc.
Does Multipath impact signal strength?
Yes, multipath propagation of radio signals causes fading of the transmitted signal, which can be indicated by fluctuations in signal strength when received by the signal receiver.
How do I mitigate Multipath?
Pe-position base station or node to mitigate possible multipath interference.
Ensure a clear path to the antenna for the strongest signal, enhancing the strength of the strongest signal AND reducing the strength of the weaker signals.
Learn More: Mutipath Propagation
Microsoft Excel displays the timestamp contained in the wireless node data files incorrectly. If you were to open the CSV file with Microsoft Notepad, you will see that the timestamp is shown properly. In order to get Excel to show the human readable time, follow the below procedure:
- Highlight all of column A (column with the timestamp)
- Right click on highlighted region and select Format cells...
- Select the Number Tab in the window that open and choose Custom from the Category box
- Scroll to the bottom of the list in the Type box, find this entry: m/d/yyyy h:mm and click it
- Add to the entry an :ss.000 so it now looks like this: m/d/yyyy h:mm:ss.000
- Click OK
The timestamp will now be correct.
