Device Overview
Introducing NCD’s Two Channel Vibration Sensor Gen4. Lightweight rugged and reliable for accurate asset monitoring and boasting up to a 2-mile range using a wireless mesh networking architecture & Incorporating a 16-bit Vibration and integrated Temperature sensor.
This sensor combines these data with temperature data in a data packet, and transmits the result to modems and gateways within wireless range. Once transmission is complete, the vibration sensor goes back to sleep, thus minimizing power consumption.
Features:
- Small & lightweight for ease of installation.
- IP65 rated sealed enclosure for dust &
moisture protection. - Metal probe housing for durability in harsh industrial environments.
- A versatile user-configurable sample rate for slow or fast-running machines
- Integrated temperature sensor in base.
- In-Built Machine Learning optimizes power consumption.
- Asset On-Time Calculator automatically tracks operational status.
- Hardware Accelerator enhances vibration sampling accuracy.
- Available Frequencies – 900Mhz, 868Mhz, and 2.4Ghz
- Supports MESH networking via DigiMesh
- Fully open Node-RED library for configuration and data ingestion
Figure 1: Device Overview
Status LED
The Status LED is used to indicate errors or other sensor diagnostics.
LED blinks once – Message was sent successfully and no error in last sensor read as well in data transmission.
LED blinks twice and then one more time – Message was sent successfully but there was an error in last sensor read.
LED blinks thrice – MCU is having issue communicating with the radio module.
Sensor Specifications
| Specifications | Minimum | Nominal | Maximum | Notes |
|---|---|---|---|---|
| Height | 85mm | |||
| Base diameter | 48mm | |||
| Weight | 225g | |||
| Enclosure Rating | IP67 | |||
| Mounting | ¼-28 UNF thread Magnetic mount | |||
| Temperature Rating | -40° C | 23° C | 85° C | Component Rating |
| Tested Temperature | 0° C | 23° C | 40° C | As Tested by NCD Staff |
| Probe Temperature | -40° C | 23° C | 105° C | As Tested by NCD Staff |
| Temperature Sensor Accuracy | ±1°C | |||
| Accelerometer Sampling Rate | 26.6 kHz | Vibration Sensor Data Rate | ||
| Accelerometer Bandwidth | 6.3 kHz | |||
| Accelerometer Full-Scale Range | -16g | +16g | ||
| Accelerometer Noise | 70 μg/ √Hz | |||
| Sample Duration | 1sec | 1sec | 10sec | Device will take readings for the set time and then send over wireless |
Printed Circuit Board Specifications
| Parameter | Minimum | Nominal | Maximum | Notes |
|---|---|---|---|---|
| Trace Width | 0.007 inch | 0.012 inch | 0.25 inch | Trace Width depends on the Trace Type |
| Layer Count | 2L - Rigid | Top and Bottom Layer | ||
| Material Type | FR-4 TG170 | FR-4 TG170 | FR-4 TG180 | |
| Surface Finish | ENIG 2u" | |||
| IPC Standard | IPC CLASS 2 | |||
| Finished Copper Foil | 1.0/1.0 OZ | |||
| Finished Thickness | 0.062 inc | |||
| Fine line <4.0/4.0mil | No | |||
| Blind & Burried Vias | No | |||
| Non-Conductive Resin | No | |||
| Conductive Resin | No |
Mechanical Drawing
Enclosure Type 1
Enclosure Type 2
RF Module Specifications
| Parameter | 868MHz | 900MHz | 2.4GHz |
|---|---|---|---|
| Frequency Band | 863 MHz to 870 MHz | 902 to 928 MHz | ISM 2.4 GHz |
| Transmitter Power | Up to 13 dBm ERP | Up to 24 dBm | Up to 8 dBm |
| Receiver Sensitivity | -106 dBm at 80 Kbps | -101 dBm at 200 Kbps | -103 dBm at 250 Kbps |
| Range (dense urban) | ~1000ft | ~1000ft | ~300ft |
| Range (line of sight) | ~2 miles | ~2 miles | ~1 mile |
| Data Rate | 80 Kbps | 200 Kbps | 250 Kbps |
| Networking Protocol | Digi XBee® DigiMesh® | Digi XBee® DigiMesh® | Digi XBee® DigiMesh® |
| Encryption | 128-bit AES | 128-bit AES | 128-bit |
| Reliable Packet Delivery | Retries/acknowledgements | Retries/acknowledgements | Retries/acknowledgements |
| IDs | PAN ID and addresses, cluster IDs and endpoints (optional) | PAN ID and addresses, cluster IDs and endpoints (optional) | PAN ID and addresses, cluster IDs and endpoints (optional) |
| Certification | CE/RED, ROHS Compliant | FCC (America), IC (Canada), C-Tick (Australia), Anatel (Brazil), IDA (Singapore) | FCC (America), IC (Canada), RCM (Australia), Anatel (Brazil), Teleck MIC (Japan), KCC (South Korea) |
Power Requirements and Expected Battery Life
Power Requirements
While changing the batteries:
- Turn off the sensor
- Only use a new D-cell battery (obtain one from NCD, as it has a built in supercapacitor, this is not a regular battery).
- Make sure to align the connector in the proper orientation (this will assure you match the polarity)
- The battery should not be replaced in fire-risky areas
- Do NOT install a rechargeable battery
Expected Battery Life
| Specifications | Minimum | Nominal | Maximum | Notes |
|---|---|---|---|---|
| Batteries size | 16000mAh | This device has a single D-Cell (LR20) battery | ||
| Battery Life 1 TPD | 10 Years | TPD Transmissions per Day | ||
| Battery Life 12 TPD | 8 Years | TPD Transmissions per Day | ||
| Battery Life 24 TPD | 5 Year | TPD Transmissions per Day | ||
| Battery Life 96 TPD | 3 Year | TPD Transmissions per Day |
Head to the NCD store if you want to purchase the Two Channel Vibration Sensor Gen4.
If you already have the device and would like more information into its basic and advanced operations check out the Quick Start Guide and User Manual.