Model: HMJ1010-WAT
Product Overview
The Smart 3-in-1 Sensor integrates three detection technologies: Ultrasonic (AA), Transient Earth Voltage (TEV), and Temperature & Humidity. It is widely used in substations, switching stations, and other electrical environments to monitor partial discharge and ambient temperature/humidity in ring main units (RMUs) and switchgear. This device enables early detection of potential insulation defects and provides critical support for the safe and stable operation of electrical equipment.
Key Features
1.Multi-Parameter Integrated Detection
The sensor combines TEV, AA, and temperature/humidity measurement into a single unit. It simultaneously collects electrical signals, mechanical vibration data, and environmental conditions. The multi-dimensional data enables comprehensive and accurate assessment of partial discharge activity and insulation health.
2.Strong Anti-Interference Capability
Equipped with advanced filtering, shielding, and noise suppression technologies, the sensor can operate reliably in complex electromagnetic environments commonly found in power systems.
3.Intelligent Diagnosis & Early Warning
Built-in smart algorithms and data analysis modules enable real-time processing of collected data. The sensor can automatically identify patterns and characteristics of partial discharge. Based on preset thresholds and rules, it performs fault diagnosis and generates early warnings, helping to prevent insulation failures.
4.Easy Installation
Typically mounted using magnetic or other quick installation methods, the sensor requires no major modifications or disassembly of power equipment. It can be installed and maintained while equipment remains energized, ensuring uninterrupted power supply and equipment safety.
Technical Specifications
| Parameter | Specification |
| TEV | Frequency Range: 1–100 MHz |
| Measurement Range: 0–70 dB | |
| AA | Resonant Frequency: 40 kHz |
| Measurement Range: -10–75 dB | |
| Temperature | Measurement Range: -40 to +125℃ |
| Humidity | Measurement Range: 0–100% RH |
| Communication | Wireless version: LoRa |
| Wired version: RS485 | |
| Power Supply | Wireless version: Built-in Li-battery |
| Wired version: DC 24V | |
| Operating Temp | -40 to +85℃ |
| Operating Humidity | 5–95% RH |
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