上海MLSYJ vibration string-type piezometer

Ⅰ、Introduction:

MLSYJ-XX vibration string-type piezometer ,also known as a pore water pressure gauge, is a pressure sensor capable of monitoring both groundwater levels and ambient temperatures at the installation point. It features stable performance, high sensitivity, and compact dimensions, with a robust and aesthetically pleasing stainless steel housing. Primarily designed for automated monitoring, it can be adapted for use in pressure-measuring pipes or foundation boreholes with the addition of compatible accessories.

Ⅱ、Overview：

The vibration string-type piezometer primarily consists of a stainless steel protective tube, coil frame, pressure-receiving diaphragm, and high-strength steel wire. Within the vibrating-wire piezometer is a highly sensitive pressure-receiving diaphragm, to which a high-strength steel wire is fixed. The other end of this steel wire is secured to the coil frame. During operation, pressure variations on the diaphragm cause deformation. This minute displacement alters the tension in the steel wire, thereby affecting its vibration frequency. By measuring changes in oscillation frequency, pressure variations on the diaphragm can be converted and calculated. The square of the vibration frequency is proportional to the pressure on the diaphragm. The vibrating-wire piezometer employs an excitation circuit to drive the sensor coil. When the excitation signal frequency approaches the natural frequency of the steel wire, the wire rapidly reaches a resonant state. After the excitation signal is removed, the wire continues to vibrate at its natural frequency for a period of time. The monitoring circuit of the data acquisition instrument filters, amplifies, and shapes the induced signal generated by the vibration before collecting it. By measuring the pulse period of the induced signal, the vibration frequency of the wire can be determined.

Ⅲ、Technical parameter：

Note: Parameters and specifications can also be customized as required.

Features:

1. Utilizes imported steel strings for stable temperature performance, extended service life, and consistent product quality;

2. Incorporates built-in intelligent temperature sensors for convenient temperature compensation, enhancing monitoring data accuracy and reliability;

3. Features IP68-rated standard design with superior waterproof performance;

4. Employs standard hydraulic cables for enhanced system reliability.

Ⅳ、Model selection：

Ⅴ、Installation and mode of connection:

The piezometer uses a two-core shielded cable. If equipped with a temperature sensor, a four-core shielded cable is used.

Ⅵ、Matters need attention：

1.As this product is a high-precision electronic measurement sensor, it can effectively prevent collisions and similar issues. If the product becomes unusable due to severe drops or impacts, please contact our after-sales service department. Do not attempt to disassemble it yourself.。

2.Since the product is installed on-site, it may be affected by harsh environments. Install it in a lightning-proof environment as much as possible. If necessary, the integrated environment of the product should be grounded to protect the equipment by diverting the lightning current to the ground.。

3.Before using this product, please carefully read the information provided in this guide. When inspecting the product, verify the quality inspection certificate, certificate of conformity, manual, and other documents.。

4.If the instrument malfunctions or sustains damage of any degree, please do not attempt repairs yourself. Our company has a professional after-sales team ready to assist you promptly. Do not open the equipment yourself.