V51 Series Wireless Vibration and Temperature Sensors
Model：
V51 Series
Description：
Industrial condition monitoring with three-axis MEMS vibration sensing, temperature measurement and wireless reporting. The series provides vibration feature values and, where supported by the selected communication mode, waveform data for rotating machinery monitoring and fault diagnosis.
Features：
High accuracy, low power consumption, and wireless transmission are some of its advantages.
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V51 Series Wireless Vibration and Temperature Sensors
Description and Features
V51 series vibration temperature sensor is an industrial intelligent sensor integrating vibration and temperature monitoring. It uses a three-axis MEMS accelerometer to measure the temperature of the measured object while receiving the complete vibration signal. The sensor obtains the vibration characteristic parameter data and waveform data through analysis and calculation. It has the advantages of high precision, low power consumption, wireless transmission and so on. It is suitable for condition monitoring and fault diagnosis of rotating machinery.
The sensor supports periodic acquisition and low-power wake-up trigger acquisition, and supports three groups of waveform acquisition with different configurations and up to 128K points in each group (Note: Lora supports waveform data once a day (8192 sampling points), and lorawan does not support waveform data). Combined with efficient compression algorithm and retransmission mechanism, it realizes low-power and high reliable wireless transmission of waveform data, ensuring data integrity and energy efficiency balance.
The sensor transmits the vibration characteristic parameter data and waveform data to the cloud platform through wireless communication. Users can remotely monitor the healthy operation of the equipment, ensure the safe operation of the equipment, and reduce the operation and maintenance cost without the need for on-site operation and maintenance of the operator.
Product capabilities
| Parameter | Specification |
| Measurement | Three-axis acceleration and object temperature; vibration features, FFT outputs and waveform acquisition. |
| Wireless options | Bluetooth 5.0, LoRa or 4G Cat.1; select one model. |
| Power | Replaceable 6,500 mAh battery; stated operating life of 2-10 years. Microwatt-level low-power operation is claimed by the manufacturer. |
| Acquisition | Scheduled acquisition or low-power vibration-triggered wake-up; remotely configurable parameters. |
| Industrial protection | IP67 enclosure; stainless steel and weather-resistant engineering plastic; Ex ia IIC T4 Ga marking as published. |
| Monitoring | Cloud display, remote configuration, diagnostic results and automatic alerts; private-cloud upload available on request. |
Model selection
| Attribute | V51-B | V51-L | V51-G |
| Radio | Bluetooth 5.0 | LoRa | Not specified |
| Network equipment | GW-B gateway; optional R20 repeater | GW-L gateway | IoT data SIM |
| Waveform support | 10-20,000 ms records | 8,192-point upload per day | 10-20,000 ms records |
Measurement specifications
| Parameter | Specification |
| Accelerometer type | Three-axis MEMS |
| Acceleration range | ±16 g |
| Z-axis frequency response | 10 Hz-2 kHz (±5%); 0 Hz-6 kHz (±3 dB) |
| X and Y frequency response | 0 Hz-5 kHz |
| Velocity range | 200 mm/s at 80 Hz |
| Acceleration resolution | 16 bit |
| Acceleration sampling rate | 0.4-26.67k, as published; unit not stated. See specification notes. |
| Acceleration sensitivity | 0.5 mg/LSB |
| Temperature drift | 1%/°C |
| Nonlinearity | 2% |
| Noise density | 75 µg/√Hz |
| Temperature range | -40 to +85 °C |
| Temperature accuracy | ±1 °C |
| Velocity RMS frequency range | 10 Hz-1 kHz |
| Displacement peak-to-peak frequency range | 10 Hz-1 kHz; low band: 10-200 Hz; high band: 200 Hz-1 kHz |
| Acceleration envelope | At 25.6, 26.67, 51.2 or 64 kS/s: 500 Hz-10 kHz (SKF ENV3). At other sample rates: 500 Hz high-pass filter. |
| Acceleration FFT | 2,048 lines; base frequency and amplitudes at 1×, 2×, 3× and 0.5×. |
Reported vibration features
| Parameter | Specification |
| Frequency and amplitudes | Frequency; acceleration peak; acceleration RMS; velocity RMS; displacement peak-to-peak; acceleration envelope; 1×, 2×, 3× and 0.5× amplitudes. |
| Statistical indicators | Skewness; skewness index; clearance factor; crest factor; kurtosis; kurtosis index; impulse factor; variance; spectral variance; spectral mean; spectral RMS. |
| Orientation | Tilt angle; roll angle; pitch angle. |
RMS = root mean square. LSB = least significant bit. g = standard gravitational acceleration; mg and µg are milli-g and micro-g.
Acquisition and data handling
| Parameter | Specification |
| Feature calculation record length | 1k, 2k or 4k sample points; configurable. |
| Acquisition trigger | Low-power vibration wake-up trigger or scheduled collection. |
| Scheduled intervals | 1, 2, 5, 10, 15, 20, 30, 60 or 120 minutes; configurable. |
| Waveform configurations | Three independently configured acquisition groups; up to 128k points per group, subject to communication-mode limitations. |
| Waveform record duration | 10-20,000 ms for Bluetooth or 4G Cat.1. |
| LoRa waveform limit | One waveform upload per day, containing 8,192 sample points. |
| LoRaWAN waveform limit | Waveform data not supported. |
| Waveform transfer | Compression and retransmission for low-power wireless delivery and data integrity. |
| Local storage | 64 MB |
| Adjustable settings | Measurement range, sampling rate, point count and sampling interval. |
Power and environmental specifications
| Parameter | Specification |
| Battery | ER26500M lithium thionyl chloride battery; 6,500 mAh; replaceable. |
| Published battery life | 2-10 years; operating conditions for this figure are not stated. |
| Weight | 211 g |
| Operating temperature | -40 to +85 °C |
| Operating humidity | 10-90% RH |
| Housing | Stainless steel and weather-resistant engineering plastic. |
| Ingress protection | IP67 |
| Explosion-protection marking | Ex ia IIC T4 Ga (source capitalization: EX ia IIC T4 Ga). |
| Mounting | M6 threaded fastening, adhesive bonding or optional magnetic mounting. |
Cloud platform and software
The Qingcheng IoT Cloud Platform provides data display and queries, remote configuration, monitoring and alarm notifications. The same companion software applies to all three sensor models.
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Remote configuration and maintenance
Feature acquisition: acquisition interval and delay, displacement filter mode, principal vibration frequency, measurement range, sample rate and point count.
Feature acquisition: acquisition interval and delay, waveform measurement range, sample rate and acquisition duration. Waveform functions remain subject to model limitations.
Firmware: remote firmware updates are supported.
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Data access and alarms
The platform displays the reported vibration features listed in this datasheet. Data can be downloaded in CSV format. Threshold exceedances trigger maintenance alerts by SMS and email. Upload to a customer-designated private cloud is available on request.
Platform address: http://cloud.ae-ndt.com
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Mobile inspection
TBluetooth 5.0 direct phone connectivity is described for on-site inspection. The mobile inspection app is explicitly marked as under development on the product page.
Installation
The sensor is battery powered and requires no sensor power or signal cabling. The installation described on the page consists of the following steps:
1. Remove protective paint from the measurement surface by grinding.
2. Apply coupling agent.
3. Secure the sensor using the M6 thread, adhesive bonding or optional magnetic mounting.
4. For Bluetooth and LoRa installations, place the gateway in the designated equipment enclosure at the installation site. The 4G configuration does not require this gateway.
System configurations
| Parameter | Specification |
| V51-G | V51-G sensor and IoT data SIM. A SIM is not included with standard shipment; arrange it in advance if required. |
| V51-L | V51-L sensor with a GW-L LoRa gateway for network operation. |
| V51-B | V51-B sensor with a GW-B Bluetooth gateway. R20 repeater available as an option and not included with standard shipment; arrange it in advance if required. |
| R20 link distances | R20 to GW-B: 600 m. R20 to V51-B: 300 m, as listed in the configuration section. |
| Companion software | Qingcheng IoT Cloud Platform; mobile inspection app under development. |
V51_Series_Datasheet.pdf
