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SDJ-301 Shaft Vibration Protection Transmitter with 4-20mA Output and Two-Stage Alarm Relay for Real-Time Monitoring

Name: SDJ-301 Shaft Vibration Protection Transmitter with 4-20mA Output and Two-Stage Alarm Relay for Real-Time Monitoring
Brand: OUTER ELECTRONIC TECHNOLOGY (HK) LIMITED
SKU: SDJ-301
Price: 1.00 USD
Availability: InStock

Brand Name:	OEM
Model Number:	SDJ-301
MOQ:	1
Price:	Negotiations

Detail Information

Product Description

Detail Information

Place of Origin:

China

Packaging Details:

New original box

Highlight:

4-20mA Output Shaft Vibration Protection Transmitter

Two-Stage Alarm Relay Vibration Protection Transmitter

Real-Time Monitoring Vibration Transmitter

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.

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products details

SDJ-301 Shaft Vibration Protection Transmitter with 4-20mA Output and Two-Stage Alarm Relay for Real-Time Monitoring

SDJ-301 Shaft Vibration Protection Transmitter with 4-20mA Output and Two-Stage Alarm Relay for Real-Time Monitoring

4-20mA Output Shaft Vibration Protection Transmitter

Two-Stage Alarm Relay Vibration Protection Transmitter

Real-Time Monitoring Vibration Transmitter