SDJ-301 Shaft Vibration Protection Transmitter with 4-20mA Output and Two-Stage Alarm Relay for Real-Time Monitoring
Price:
Negotiations
MOQ:
1
Delivery Time:
Negotiable
Brand:
OEM
Product Description
SDJ-301 Shaft Vibration Protection Transmitter
The SDJ-301 shaft vibration protection transmitter provides comprehensive monitoring of radial vibration in rotating machinery rotors, measuring shaft vibration, runout, eccentricity, and other critical parameters to detect increased vibration caused by rotor imbalance, misalignment, and loose components.
Key Applications
Ideal for rotating machinery with various sliding bearings including steam turbines, fans, compressors, motors, pumps, and similar industrial equipment.
Measurement Capabilities
Monitors peak-to-peak value of radial vibration (displacement) for precise rotor condition assessment and early fault detection.
Output Interfaces & Features
- Active output terminals with 4-20mA or 1-5V signals
- Local LED display showing machine operating status (OK, Alert, Danger, Break)
- Isolated two-stage alarm relay output terminals (ALERT and DANGER)
- Local alarm reset button with automatic reset function
- Compatible with QBJ-3Q digital display for vibration value monitoring via PLC or DCS
- Buffered output of raw signal for direct connection to status diagnostic analyzers
- Flexible power supply options: 24VDC, 220VAC, or 110VAC
Continuous Vibration Monitoring System
This single-channel vibration protection transmitter enables online real-time measurement of rotor shaft radial vibration, outputting peak-to-peak displacement values while providing two-level alarm outputs for early detection and protection of rotating machinery.
The low-frequency option extends measurement capabilities to include turbine runout, steam turbine shaft vibration, and eccentricity parameters, offering simple installation without adjustments and excellent performance-to-price ratio.
Installation & Configuration
Designed for easy installation in original preamplifier locations. For comprehensive monitoring, typically two SDJ-301 transmitters (X and Y directions, spaced 90° apart) are installed near each bearing. Standard dual-bearing rotating machinery requires four vibration transmitters for complete coverage.
Technical Specifications
| Sensor Compatibility | 8mm eddy current sensors (standard probe and extension cable, optional armored cable system) |
| Output Load Capacity | 4-20mA active output drives loads up to 750Ω (supports more than three loads in series) |
| Wiring Configuration | 3-wire protection transmitter requiring single-point grounding system |
| Relay Output | SPDT single-pole double-throw type, fully isolated dry contact, maximum load 2A |
| Calibration | Factory pre-adjusted with optional field adjustments for alarm points, zero point, and full-scale calibration |
Customization & Integration
The SDJ-301 protection transmitter can be customized to meet specific field requirements with flexible function selection. Features include adjustable full-scale ranges for total vibration values and specialized low-frequency options for turbine applications. The relay outputs integrate seamlessly with PLC, DCS systems, and can directly control alarms and unit relays.
Similar Products
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
OUTER ELECTRONIC TECHNOLOGY (HK) LIMITED
Location
NO. 7-A5, ZHONGHANGBEIYUAN BUILDING, 42 ZHONGHANG ROAD, HUAQIANGBEI SUBDISTRICT, FUTIAN DISTRICT, SHENZHEN , CHINA
Contact Person
Biona