XIYUAN ST31D20 Integrated Vibration & Temperature Sensor - 0-20mm/s, 4-20mA RMS, IP65
XIYUAN ST31D20 Integrated Vibration & Temperature Sensor - 0-20mm/s, 4-20mA RMS, IP65 - Image 2
XIYUAN ST31D20 Integrated Vibration & Temperature Sensor - 0-20mm/s, 4-20mA RMS, IP65 - Image 3
SKU: SENS-3372
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XIYUAN ST31D20 Integrated Vibration & Temperature Sensor - 0-20mm/s, 4-20mA RMS, IP65

₹34,369.00 (Inclusive of all taxes)
Out of Stock

The XIYUAN ST31D20 is an industrial-grade integrated piezoelectric sensor that outputs both vibration velocity (0-20mm/s RMS) and temperature (-50°C to +300°C) via a standard 4-20mA current loop, designed for direct connection to PLCs, DCS, and SCADA systems.

Features

  • Dual-parameter output for vibration velocity (0-20mm/s RMS) and temperature via integrated Pt100A sensor.
  • Industry-standard 4-20mA RMS current loop output ensures robust, noise-immune signal transmission over long distances.
  • High accuracy with amplitude non-linearity <2% and a wide operational frequency range of 10–1000Hz (±1dB).
  • Rugged IP65-rated housing withstands harsh industrial environments and shock up to 2000g.
  • Compact form factor (30mm x 55mm) with M8 or M12 connector compatibility for easy panel or machine integration.

Out of stock

Description

The XIYUAN ST31D20 employs a piezoelectric sensing element to convert mechanical vibration into a proportional electrical signal, specifically measuring velocity within a 0-20mm/s RMS range. This signal is conditioned onboard and transmitted via a stable 4-20mA RMS current output, an industry standard for its immunity to electrical noise and voltage drop over long cable runs. Simultaneously, an integrated Pt100A platinum resistance temperature detector (RTD) provides accurate temperature monitoring from -50°C to +300°C, enabling comprehensive machine health analysis.

Engineered for demanding industrial settings, the sensor operates reliably within an ambient temperature range of -40°C to +85°C and is sealed to IP65 standards, protecting against dust ingress and water jets. Its robust construction can withstand mechanical shock up to 2000g, making it suitable for high-vibration applications like rotating machinery, fans, pumps, and compressors. The compact, cylindrical design facilitates installation in space-constrained locations.

Key Features

  • Integrated Dual Sensing: Combines piezoelectric vibration velocity measurement with a high-accuracy Pt100A temperature sensor in one hardened housing.
  • Industrial Signal Output: 4-20mA RMS current loop provides a linear, two-wire interface compatible with virtually all PLC analog input modules and data acquisition systems.
  • Precision Engineering: Delivers amplitude non-linearity of less than 2% and a total system error within 5% across the specified velocity and frequency range.
  • Broad Dynamic Response: Covers a frequency spectrum from 10 Hz to 1000 Hz (±1dB), suitable for monitoring a wide array of rotational and reciprocating machinery.
  • Environmental Durability: IP65 protection rating ensures reliable operation in dusty or wet industrial environments, coupled with a wide operating temperature tolerance.
  • High-Impact Resistance: Constructed to survive shock loads up to 2000g, guaranteeing longevity in high-vibration and potential impact scenarios.
  • Optimized Form Factor: Compact 30mm diameter by 55mm length design allows for flexible mounting on bearings, housings, or structural points.
  • Simplified Integration: Requires only a 15-30VDC power supply on the same two wires used for the 4-20mA signal, reducing wiring complexity.

Applications

  • Predictive Maintenance on Rotating Machinery: Continuous monitoring of vibration velocity and bearing temperature on motors, pumps, fans, and gearboxes to detect imbalance, misalignment, or lubrication failure.
  • Industrial Compressor & Turbine Monitoring: Assessing the mechanical health and operational stability of high-speed compressors, blowers, and steam/gas turbines in power generation and process plants.
  • HVAC System Balancing & Fault Detection: Monitoring fan vibration and motor temperature in large commercial HVAC systems to ensure efficient operation and prevent unexpected downtime.
  • Heavy-Duty Conveyor & Material Handling Systems: Tracking vibration levels on conveyor rollers, drives, and shakers to identify wear, bearing defects, or mechanical blockages.
  • Paper Mill & Printing Press Machinery: Vibration analysis on large rollers, cylinders, and drives to maintain product quality, reduce web breaks, and schedule maintenance.

Technical Specifications

ParameterSpecification
ModelST31D20
Measurement TypeVibration Velocity & Temperature
Velocity Range0 – 20 mm/s (RMS)
Temperature Range (Pt100A)-50°C to +300°C
Output Signal4–20mA RMS (Two-wire current loop)
Supply Voltage15 – 30 VDC
Operating Current4 – 20 mA (Loop current)
Frequency Response10 – 1000 Hz (±1dB)
Accuracy (Amplitude Non-linearity)< 2%
Overall System Error≤ 5%
Operating Temperature-40°C to +85°C
Protection RatingIP65
Shock Resistance2000g
Dimensions (Diameter x Length)30 mm x 55 mm
Weight90 g
ConnectorIntegrated cable or standard industrial connector (e.g., M8/M12)

Frequently Asked Questions

What is the power supply requirement for the ST31D20 sensor?

The ST31D20 operates on a standard two-wire 4-20mA loop, requiring a DC power supply between 15 and 30 volts. The supply powers the sensor, and the measured vibration and temperature data is conveyed by modulating the loop current between 4mA and 20mA. Ensure your PLC or data acquisition system can provide this loop power on its analog input channel.

How do I interpret the 4-20mA output for vibration and temperature?

The single 4-20mA output carries both parameters. Typically, the lower portion of the range (e.g., 4-12mA) is mapped to the vibration velocity (0-20mm/s), while the upper portion (e.g., 12-20mA) represents the temperature (-50°C to +300°C). You must configure your receiving system (PLC/DCS) with the correct scaling based on the sensor's datasheet to separate and display the two measurements accurately.

What mounting method is recommended for accurate vibration readings?

For reliable high-frequency response, mount the sensor directly onto a clean, flat, and unpainted machine surface using a stud or strong adhesive mount. The mounting point should be as close as possible to the bearing or vibration source of interest. Ensure the surface is free of oil, debris, and rust to guarantee a solid mechanical connection, which is critical for measurement fidelity up to 1000Hz.

Can this sensor be used outdoors or in wet conditions?

Yes, the ST31D20's IP65 rating makes it suitable for outdoor or damp industrial environments. It is protected against dust ingress and low-pressure water jets from any direction. However, it is not submersible. For prolonged exposure to heavy rain or direct high-pressure washdown, additional protective housing or a higher IP-rated model should be considered.

Does the sensor require calibration, and how is it performed?

The sensor is factory calibrated for both vibration velocity and the integrated Pt100A temperature element. Field calibration is generally not required for the vibration channel. If extreme accuracy for temperature is needed, the Pt100A output can be verified against a known reference. Calibration of the entire 4-20mA loop should be performed using a precision current source and a calibrated vibration reference to ensure the scaling in your control system is correct.

Package Includes

  • 1 x XIYUAN ST31D20 Integrated Vibration & Temperature Sensor
  • 1 x Connection Cable

Additional Information

Weight 0.09 kg
Dimensions 5.5 × 3 cm

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