Overview
AKUSENSE MJD18 series is a 3‑axis (X/Y/Z) MEMS capacitive vibration sensor for equipment vibration monitoring and condition‑based maintenance. Measuring range up to ±16g with multi‑level resolution (15.62mg to 125mg), vibration frequency up to 400Hz. It delivers both digital and analog outputs: addressable RS‑485 (16bit), 0‑5V/0‑10V voltage and 4‑20mA current, directly connecting to PLC and data acquisition systems. Built with IP67 SUS cylindrical housing (M18×40.5mm), operating at ‑25℃~70℃, it reliably detects abnormal vibration, unbalance and misalignment on motors, pumps, fans and production machinery — helping reduce unplanned downtime before failure occurs.
Key Features
- 3‑Axis X/Y/Z Measurement — detects vibration in all three directions, no need to install multiple sensors
- Wide Measuring Range ±16g — multi‑resolution 15.62~125mg, covering subtle to strong vibration
- Vibration Frequency 0~400Hz — suits common rotating equipment monitoring
- Triple Output Options — RS‑485 digital (16bit) + 0‑5V/0‑10V voltage + 4‑20mA current
- Direct PLC Integration — addressable RS‑485, 57600 baud, easy multi‑sensor networking
- IP67 SUS Housing — M18×40.5mm stainless steel, dustproof and water‑resistant
- Wide Temperature ‑25℃~70℃ — stable operation in workshop environments
- Protection Circuits — reverse polarity & surge protection for reliable field use
Technical Specifications
| Parameter | Specification |
|---|---|
| Working Principle | MEMS capacitive |
| Measuring Axis | X / Y / Z (3‑axis) |
| Measuring Range | ±16g |
| Resolution | 15.62mg/±2g; 31.25mg/±4g; 62.5mg/±8g; 125mg/±16g |
| Vibration Frequency | 0~400Hz |
| Technology | MEMS |
| Digital Output | Addressable RS‑485, 57600 baud, 1 stop bit, no parity |
| Digital Output Resolution | 16bit/RS485; 12bit/Analog |
| Voltage Output | 0~5V / 0~10V Selectable |
| Current Output | 4~20mA / 0~20mA / 0~24mA Selectable |
| Load Resistance | 1K~1MΩ/Voltage; 100~500Ω/Current |
| Operating Voltage | 24V DC ±20% |
| Power Consumption | ≤1W |
| Operating Temperature | ‑25℃ ~ 70℃ (No Freezing) |
| Storage Temperature | ‑30℃ ~ 90℃ (No Freezing) |
| Operating Humidity | 5% ~ 80% RH (No Condensation) |
| Storage Humidity | 5% ~ 90% RH (No Condensation) |
| Housing | Cylindrical M18×40.5mm |
| Housing Material | SUS (Stainless Steel) |
| Weight | Approx. 100g |
| Enclosure Rating | IP67 |
| Protection Circuit | Reverse polarity / Surge protection |
| Accessories | Nut |
Model Selection Table
| Model | Connection | Note |
|---|---|---|
| MJD18‑W | 2m / 5‑wire cable | Fixed wiring installation |
| MJD18‑P | M12 / 5‑pin pigtail connector | Quick plug & disconnect, easy maintenance |
Applications
- Motor, pump, fan and gearbox vibration monitoring
- Production machinery abnormal vibration alarm
- Equipment predictive maintenance & condition monitoring
- Machine tool spindle and process stability detection
- Rolling mill, compressor rotating equipment monitoring
Industry Pain Points Solved
- Reduce unplanned downtime — early abnormal vibration detection before bearing or spindle failure
- Simplify installation — single 3‑axis sensor replaces multiple single‑axis units
- Easy system integration — RS‑485 + analog outputs directly to PLC/DCS
- Reliable in harsh workshop — IP67 SUS housing against dust and water splash
Sample & Technical Support
- Sample units available for on‑site vibration verification
- RS‑485 protocol and wiring technical guidance
- Small‑batch trial orders accepted
- Output range and protocol configuration support
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