Vibration transmitter SDJ-705

Vibration transmitter SDJ-705

1、 Product Overview

Vibration, temperature, and oil level transmitters are highly integrated industrial monitoring devices that can simultaneously collect three key parameters of mechanical equipment: vibration speed (or displacement), bearing temperature, and lubricating oil level, and output them through standard current signals. This product is specifically designed for safety monitoring of rotating machinery such as fans, water pumps, gearboxes, compressors, etc. Through multi parameter fusion measurement, it significantly simplifies the on-site installation process and improves the efficiency and reliability of equipment status monitoring.

Core functional features

1. Multi parameter integrated measurement

·Vibration monitoring: using magneto electric or capacitive sensors to measure the true effective value (RMS) of vibration velocity, with a frequency response range covering 3Hz-2kHz and a range of 0-20mm/s or 0-100mm/s, accurately reflecting the mechanical vibration status of the equipment.

·Temperature monitoring: Monitor the temperature of bearings or lubricating oil through platinum resistors (Pt100) or semiconductor integrated sensors, with a range typically ranging from -50 ℃ to 500 ℃ (default 0-150 ℃) and an accuracy of ± 0.5% F.S.

·Oil level monitoring: Based on pressure sensing or thermal conductivity principles, it detects the height of lubricating oil level, with a range generally from -10mm to+40mm (0mm corresponds to the lower limit of normal oil level), and an error of ≤± 1mm.

2. Signal processing and output

·Three parameter independent transmission, both outputting two-wire 4-20mA standard current signals, can be directly connected to PLC, DCS or secondary instruments, with strong anti-interference ability, supporting long-distance transmission (load resistance ≤ 750 Ω).

·The vibration signal undergoes bandpass filtering, true RMS conversion, and V/I conversion, while the temperature and oil level signals are processed by high-precision amplifiers to ensure linear and reliable data.

3. Structural design and environmental adaptability

·All stainless steel sealed shell, high protection level, with anti-corrosion, seismic, and explosion-proof characteristics, suitable for harsh industrial environments ranging from -30 ℃ to 100 ℃.

·Compact design (typical size of φ 45 × 80mm or customized), easy to install, only requires one threaded hole (common specifications M12 × 1.5 or M27 × 2), reducing the number of on-site openings.

Vibration transmitter SDJ-705 parameter category specification index

Power supply DC 24V ± 10% (range 12V~36V)

Output signal 3-channel independent 4-20mA (vibration/temperature/oil level)

Vibration measurement range: 0-20mm/s (optional up to 100mm/s); Frequency response: 5Hz~2kHz; Accuracy: ± 1mm/s

Temperature measurement range: -50 ℃ to 500 ℃; Accuracy: ± 0.5% F.S

Oil level measurement range: -10mm to+40mm; Accuracy: ± 1mm (non-conductive medium)

Electrical connection 5-6 core shielded cable (power supply, common ground, vibration/temperature/oil level signal output)

Mechanical characteristics: Installation threads such as M12/M27 can be customized; Material: Stainless steel

Application scenarios

This product is widely used for monitoring key equipment in industries such as power, petrochemicals, metallurgy, and mining

·Fan gearbox: Real time monitoring of box vibration, lubricating oil status, and bearing temperature to prevent gear wear or oil shortage faults.

·Pumps and compressors: Analyze early mechanical imbalances and misalignment issues through vibration trend analysis, and optimize lubrication management based on temperature data.

·Motor and turbine: Multi parameter collaborative warning to avoid unplanned shutdown due to bearing overheating or abnormal oil level.

Selection and installation suggestions

1. Selection points:

·Clear range requirements (such as vibration speed, upper temperature limit), installation thread specifications, and probe insertion depth.

·Select the protection level based on the on-site environment (such as explosion-proof and high-temperature resistant versions).

2. Installation specifications:

·Ensure that the probe is in close contact with the measuring surface (vibration monitoring) or fully immersed in the medium (oil level monitoring).

·When wiring, the shielding layer should be grounded to avoid signal interference.

Value advantage

·Integration: A single probe replaces multiple sensors, reducing procurement and maintenance costs.

·High reliability: Built in anti-interference circuit and sealed structure, suitable for harsh working conditions, long-term maintenance free.

·Intelligent operation and maintenance: Multi parameter data linkage provides decision-making basis for predictive maintenance and improves equipment lifecycle management level.