1. General Overview
Model: SP3403

Series: EPRO Industrial Vibration Sensors

Type: 3-in-1 Vibration & Temperature Sensor (Velocity/Acceleration/Temperature)

Application: Predictive maintenance for motors, pumps, fans, and gearboxes in harsh environments.

2. Key Parameters
Vibration Monitoring
Measurement Range:

Velocity: 0–50 mm/s RMS

Acceleration: 0–20 g

Displacement: 0–2000 µm (derived)

Frequency Response:

Velocity: 10 Hz – 1 kHz (±3%)

Acceleration: 1 Hz – 10 kHz (±5%)

Sensitivity:

Velocity: 100 mV/mm/s

Acceleration: 50 mV/g

Temperature Monitoring
Sensor Type: Integrated PT100 (3-wire)

Range: -30°C to +120°C

Accuracy: ±0.5°C

Outputs & Connectivity
Analog Output:

4–20 mA (vibration + temperature, configurable)

Digital Output:

RS-485 (Modbus RTU)

Alarm Relays:

2× SPDT (Danger/Warning)

Environmental Ratings
Housing: Stainless Steel (316L)

Protection: IP68 (submersible)

Operating Temp: -40°C to +85°C

Shock Resistance: 100g

Power Supply
Voltage: 12–30V DC (loop-powered)

Current Consumption: <25 mA

3. Key Features
✔ 3-in-1 design – Combines vibration + temperature in one rugged sensor
✔ Wide frequency range – Covers most mechanical faults (unbalance, misalignment, bearing wear)
✔ Modbus RTU – Enables direct PLC integration
✔ ATEX/IECEx Certified (Zone 21/22 available)

4. Typical Applications
HVAC Systems (fan monitoring)

Pump & Motor Protection

Conveyor Belt Drives

Mining & Offshore Equipment

Compliance: ISO 10816, API 670 (for machinery protection)

Ordering Information
Standard Model: SP3403-100 (4–20mA + Modbus)

Explosion-Proof: SP3403-EX (ATEX Zone 22)