Intelligent sound measuring instrument / grinding sound measuring instrument data

The BJW-SHZ7/MYC-5 intelligent grinding sound measuring instrument is a highly effective and direct tool for monitoring the load in a ball mill. Designed with advanced features, it offers simple setup, excellent stability, full digitalization, and user-friendly panel settings for alarm thresholds. This latest model builds upon the successful design of the BJW-SHZ-6, offering improved performance, reliability, and compact size. The device uses a membrane keyboard and is fully sealed, providing superior dust resistance and ease of operation. By integrating this instrument into your grinding system, you can enhance the overall efficiency of the mill, reduce energy consumption, lower labor demands, and extend the life of grinding media and liners. It also helps prevent liner screw breakage, making it a cost-effective solution that typically pays for itself within 6 to 12 months. **Working Principle** The BJW-SHZ7/MYC-5 captures noise generated by the grinding process through a specially designed probe installed on-site. The signal is transmitted via shielded cables to the instrument, where it is converted into a digital decibel reading. The instrument simultaneously outputs a 4–20 mA current signal proportional to the measured sound level. Since sound intensity is inversely related to the filling degree of the grinding material and directly proportional to the ratio of grinding media to material, it allows for accurate quantification of the mill load. Operators can adjust feed rates accordingly to optimize production output and minimize power usage. Additionally, the unit includes a correction signal source for maintenance checks and a visual and audible alarm system to alert operators during critical conditions. **Technical Specifications** - **Measurement Range**: 80–150 dB or 0–100% (decibel or percentage display) - **Probe Impedance**: Approximately 600Ω - **Frequency Range**: 20–2000 Hz - **Probe-to-Instrument Distance**: ≤ 100 meters - **Output Signal**: Sound intensity output: 4–20 mA - **Display Accuracy**: ±0.1 dB - **Operating Time**: 24 hours continuous - **Ambient Temperature**: -10°C to +55°C - **Humidity**: ≤ 85% RH - **Power Supply**: 220V (±10%), 50Hz or 60Hz - **Dimensions**: 160 × 80 × 200 mm or 80 × 160 × 200 mm (opening: 152 × 76 mm or 76 × 152 mm) - **Weight**: Approximately 1 kg **Key Features** - Digital display for clear and intuitive readings - Panel-based input for setting alarm limits - Ability to avoid interference from nearby mills - High sensitivity with no drift over time - Unaffected by wear of grinding media or liners - Built-in self-checking signal for quick calibration - Fully sealed probe that resists dust and moisture, suitable for wet cement grinding after proper treatment **Applications** This instrument is ideal for use in various industrial sectors, including cement, metallurgy, power generation, and chemical processing. It is especially well-suited for open and closed grinding systems such as raw mills, cement mills, and coal mills in cement plants. Whether you're looking to improve efficiency or reduce operational costs, the BJW-SHZ7/MYC-5 provides a reliable and intelligent solution for modern grinding operations.

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