Slurry density meter

PISONICS | Xi’an Pisonics

PS7000 Series

Ultrasonic Acoustic-Impedance Slurry Density Meter

Say goodbye to nuclear-source hazards—redefining online slurry density measurement

Product Overview Product Overview

PS7000 Series Ultrasonic Acoustic-Impedance Slurry Density Meter is a next-generation, non-nuclear-source online slurry density monitoring instrument independently developed by Xi’an Pisonics Information Technology Co., Ltd. (PISONICS). It completely eliminates the radiation safety risks and cumbersome environmental‑approval and maintenance costs associated with traditional γ‑ray density meters, and is specifically designed for precise slurry density control in industries such as nonferrous metals, thermal power generation, coal washing, chemical metallurgy, and potash‑salt processing.

The instrument features an innovative linear-frequency-modulation (Chirp) acoustic‑impedance analysis algorithm, which overcomes the measurement blind spots of conventional reflective ultrasonic instruments in complex operating conditions involving bubbles, strong corrosion, and high abrasiveness. Within the full range of 0–80% mass concentration (0–3,000 kg/m³), it delivers continuous, high‑precision measurements with an accuracy of ±1% FS. It has been deployed in numerous thermal power plants, mines, and salt‑processing enterprises, demonstrating stable, “zero‑maintenance” operation for several years, providing reliable data support for process stability and quality improvement.

Measurement Principle How It Works

The acoustic‑impedance method is based on a fundamental physical phenomenon: when an ultrasonic wave propagates through a medium and encounters a solid‑liquid interface, the intensity of the reflected signal is determined by the difference in “acoustic impedance” across the interface. Acoustic impedance Z equals medium density ρ multiply sound velocity c, which is directly related to slurry density.

The PS7000 employs a single‑probe, self‑transmit‑and‑receive design: the probe continuously emits linear‑frequency‑modulated (Chirp) ultrasonic pulses into the pipeline and acquires the reflected signals in real time. The broadband characteristics of the Chirp signal enable it to penetrate bubble layers and eliminate multiple‑reflection interference; the host unit analyzes the acoustic‑impedance features of the echo via its algorithm, accurately reconstructing the slurry’s true density.

→ The higher the slurry density, the greater the acoustic impedance, the more pronounced the echo signal features, and the more precise the density reading.

Core Technical Advantages Core Advantages

Comparison with Traditional Solutions Why PS7000

Addressing the pain points of slurry density measurement—nuclear‑radiation regulatory risks, signal loss due to bubbles, short probe life from severe abrasion, and frequent fouling driving up maintenance costs—the PS7000, leveraging its non‑nuclear acoustic‑impedance principle and custom‑designed probe, achieves comprehensive superiority in three key areas: safety, anti‑interference capability, and maintenance cost:

Typical Application Scenarios Typical Applications

• Nonferrous Metallurgy — feed/slurry discharge concentration control in ore‑dressing plants, flotation process concentration monitoring, and slurry density measurement at the underflow of thickeners and the outlets of hydrocyclones
• Thermal Power Generation — limestone slurry preparation, flue‑gas desulfurization (FGD) slurry concentration monitoring, and circulating slurry density adjustment
• Coal Washing — heavy‑media suspension density control, and concentration monitoring during the separation of clean coal, middlings, and tailings
• Steel Metallurgy — limestone slurry desulfurization density measurement in steel plants, and converter dust‑collection slurry concentration monitoring
• Chemical & Potash Industries — brine concentration monitoring in salt lakes, saturated crystalline solution density control, and online measurement of solid‑liquid two‑phase flows
• Mine Tailings — tailings dam filling station outlet slurry density measurement, and grinding circuit density control

Typical Application Cases Application Cases

■ Case 1| A Thermal Power Plant in Inner Mongolia

The customer had previously used a tuning‑fork density meter and a double‑flange differential‑pressure density meter: the tuning‑fork type suffered from frequent data fluctuations due to the large volume of the pH tank and slurry settling; the differential‑pressure type exhibited significant measurement deviations caused by severe foaming in the upstream pipeline and sensor fouling. After switching to the PS7000, the issues of bubbling and fouling were completely resolved, the instrument requires virtually no maintenance, delivers stable accuracy, and fully meets the customer’s operational needs.

■ Case 2| A Potash Plant in Qinghai

Potash production relies heavily on salt‑lake resources, and the brines are characterized by high salinity, abundant suspended crystals, high viscosity, strong corrosiveness, and a tendency to foul—conditions that make it difficult for conventional density meters to operate reliably. In late October 2025, the PS7000 was installed in the plant’s blending tank, at a critical process step (potassium chloride nearing saturation, crystal content 30%–40%, temperature fluctuating between 5°C and 20°C). Two weeks of comparative testing showed that the PS7000’s readings consistently matched laboratory results within a deviation of only 0.5%–0.8%, even at peak concentrations, with no anomalies detected, fully validating its high precision and reliability under complex conditions.

■ Case 3| An Iron Ore Dressing Plant in Xinjiang

The customer had previously used a through‑beam density meter, but severe slurry bubbling frequently caused signal loss, jeopardizing production safety; after six months of operation, probe wear accelerated, leading to frequent failures. Since switching to the PS7000 series acoustic‑impedance density meter, both bubbling interference and probe wear have been completely eliminated, and the equipment has been running stably for over two years, achieving nearly “zero maintenance,” significantly enhancing system reliability and operational efficiency.

Technical Parameter Overview Technical Specifications

Precision Beyond Limits

※ For customized nonstandard ranges, special linings, explosion‑proof models, or detailed selection guidance, please contact Pisonics’ technical engineers in Xi’an.