Name: Tuning Fork Density Meter/Concentration Meter - Sino-Inst
Brand: Sino-Inst
SKU: Tuning Fork Density Meter/Concentration Meter
Price: 1599 USD
Availability: InStock

The online Tuning Fork Density Meter is used to measure the concentration of liquid media in tanks and pipelines. Concentration measurement is an important process control in product manufacturing. The Tuning Fork Density Meter can also be used as an indicator of other quality control parameters such as solid content or concentration. It can meet various user requirements for measuring density, concentration, and solid content.

Sino-Inst supplies Tuning Fork Density Meters made of special materials such as 316L, titanium, zirconium, ceramic, 2507 stainless steel, Hastelloy C, and PTFE/PFA.

RFQ More Density Meters

Features

Fully integrated “plug-and-play, maintenance-free” digital measurement for monitoring and control;
Continuous measurement;
No moving parts, minimal maintenance;
Available in materials including 316L, Hastelloy C, Zirconium, etc.;
Density, standard density, or special calculated values (solid percentage, API gravity, specific gravity, etc.), 4-20 mA output;
Temperature sensor available;
Explosion-proof certified;
Long-rod type suitable for open and closed tanks;
Rod length up to 4 meters;
Tolerates minor solids and bubbles;
Resistant to temperature and pressure variations;
Direct-insert density meters suitable for high pipeline pressures;

Technical Parameters

Accuracy (Standard Conditions)	±0.001g/cm³	±0.5（v/v，m/m）
Operating Range	0~2g/cm³	0~100%
Repeatability	±0.0001g/cm³	±0.1%
Process Temperature Effect (Compensated)	±0.0001g/cm³	±0.1% (per °C)
Process Pressure Effect (Compensated)	Negligible	Negligible

(1) The above accuracy applies to the calibration range of 0.8–1.5 g/cm³ (800–1500 kg/m³).

(2) Liquid viscosity may reach up to 2000 cP (subject to specific medium characteristics).

(3) Temperature effect refers to the maximum measurement deviation caused by process fluid temperature deviation from factory calibration temperature.

(4) Pressure effect is defined as the change in sensor flow and density sensitivity due to process pressure deviation from calibration pressure.

Temperature Specifications
Process Temperature	Standard: -25℃~+120℃ Customized: -25℃~+150℃
Ambient Temperature	-25℃~+85℃
Temperature Accuracy	0.5℃
Built-in Temperature Sensor	Temperature Chip
Structural Material
Wetted Parts	316L, Hastelloy, Titanium Alloy, Ceramic, etc.
Fork Polishing	Standard Polishing, PTFE Coating, Electrolytic Polishing
Housing	IP67, Aluminum Alloy
Pressure Rating
Maximum Operating Pressure	Standard	Within 0.4MPa
	Customized	Within 2MPa
Test Pressure	Tested at 1.5 times the maximum working pressure
Actual maximum operating pressure is limited by process connection ratings
Process Connection Type	Flanges, clamps, threads
Explosion-proof Standard	Ex d IIC T6 Gb
Power Requirements	1. 24VDC, 100mA
	2. 220VAC to 24VDC power converter (optional)
Output	Four-wire, 4-20mA, RS485 or HART protocol
Electrical Interface	M20*1.5
Viscosity Requirements	0-2000cP (depending on the specific characteristics of the medium)

Liquid and Material Compatibility

Name	Name	Molecular Formula	Concentration (%)	316L	Hastelloy	Titanium Alloy	Zirconium	PTFE
Acid	Hydrochloric acid (excluding hydrofluoric acid)	HCl	0-40	×	×	×	×	☆
	Sulfuric acid	H2SO4	0-50	×	○	×	☆	☆
		H2SO4	50-75	×	×	×	○	☆
		H2SO4	75-98	×	×	×	×	☆
	Nitric acid	NHO3	0-100	○	○	×	×	☆
	Phosphoric acid	H3PO4	0-98	×	○	×	×	☆
Base	Sodium hydroxide	NaOH	0-50	☆	☆	☆	○	☆
	Potassium hydroxide	KOH	0-50	☆	☆	☆	○	☆
	Calcium hydroxide	Ca（OH）2	0-50	☆	☆	☆	○	☆
Salt	Sodium chloride	NaCl	0-50	×	☆	☆	○	☆
	Ammonium chloride	NH4Cl	0-50	×	☆	☆	○	☆
	Ammonium sulfate	(NH4)2SO4	0-50	×	☆	☆	○	☆
Other	Urea	(NH2)2CO	0-100	☆	☆	○	☆	☆
	Sodium hypochlorite	NaOCl	0-16	×	○	×	×	☆
	Hydrogen peroxide	H2O2	0-90	☆	☆	○	☆	☆
☆Recommended ○Use under specific concentration and temperature limits × Do not use

Featured Application Industries:

Petrochemical Industry: Diesel, gasoline, ethylene, etc.
Chemical Industry: Sulfuric acid, hydrochloric acid, nitric acid, hydroacetic acid, ammonia, methanol, ethanol, brine, sodium hydroxide, refrigerant, sodium carbonate, glycerin, hydrogen peroxide, etc.
Pharmaceutical Industry: Pharmaceutical solutions, biological liquids, alcohol extraction, acetone, alcohol recovery, etc.
Food and Beverage Industry: Sugar water, fruit juice, brewing, cream, etc.
Battery and Electrolyte Industry: Sulfuric acid, lithium hydroxide, etc.
Environmental Protection Industry: Desulfurization (lime slurry, gypsum slurry), denitrification (ammonia, urea), wastewater treatment MVR (acid, alkali, salt recovery), etc.

Petroleum and petrochemical industry	Interface detection; multi-product pipelines;
Chemical industry	Acid, alkali, and salt production; quality control;
Alcohol industry	Continuous online monitoring;
Organic and inorganic chemical materials	Underground storage tanks using brine;
Pharmaceutical industry	Chinese herbal medicine concentration, alcohol recovery;
Battery industry	Lithium hydroxide, electrolyte, sulfuric acid solution concentration;

Working Principle of Tuning Fork Density Meter

An online tuning fork density (concentration) meter uses an acoustic frequency signal source to excite a metal tuning fork, causing it to vibrate freely at its center frequency. This frequency has a direct correlation with the density of the liquid in contact with it; therefore, the density of the liquid can be measured by analyzing the frequency. Temperature compensation can then be applied to eliminate temperature drift in the system. The concentration can be calculated at 20°C based on the relationship between the liquid’s density and concentration.

Particle size limitation		Contains gas	Maximum liquid viscosity
Particle diameter	Suspended particulate matter %	Contains gas	Maximum liquid viscosity
<10 micrometers	<=40%	Recommended	500cp
10~50 micrometers	<=20%	Generally not used	2000cp

FAQ

A densitometer is used to measure the density of liquids or solids.

Main functions of a densitometer:

Measuring liquid density: A densitometer can accurately measure the density of liquids, helping to determine the composition and purity of the liquid. For example, in the chemical industry, densitometers are used to monitor the quality of raw materials and finished products.

Quality control: In the pharmaceutical and food industries, density measurement is an important indicator to ensure product quality. A densitometer can detect whether a liquid contains impurities or substandard components.

Process optimization: In industrial production, densitometers can be used to monitor and control the production process in real time, ensuring product consistency and quality.

Research and development: In the research and development of new materials, densitometers are used to measure the density of materials to determine their homogeneity and reaction progress.

There are many methods for measuring density, with the buoyancy method being a common and relatively accurate one. According to Archimedes’ principle, buoyancy equals the weight of the displaced fluid, allowing the calculation of the displaced fluid volume (i.e., the volume of the object). However, precise fluid measurement and gravity correction are required to ensure accuracy.

Industrial density meters offer a wide range of functions, directly measuring density and displaying the density value and range ratio. They can also display temperature and output analog signals from 4-20mA.

Simply put, a density meter calculates density by measuring the ratio of a substance’s mass to its volume, while a hydrometer primarily measures the “specific gravity” of a medium, that is, the ratio of its weight to its volume.

Intuitively, a hydrometer uses “specific gravity” as its unit. In actual measurements, due to the influence of gravitational acceleration g, specific gravity is usually approximately equal to density. However, strictly speaking, specific gravity is the ratio of weight to volume, and its unit is N/m³ or kgf/m³.

A density meter uses “density” as its unit, and its unit is kg/m³. Density is the ratio of a substance’s mass to its volume; it is a purely physical quantity and does not depend on the external gravitational environment.

Our Sino-Inst tuning fork densitometers offer accurate measurements at a high cost-performance ratio. They can display density, concentration, and temperature values simultaneously on the screen. An integrated temperature sensor provides temperature compensation, resulting in more accurate measurement results.

If you also need to measure the density of media in tanks, pipelines, etc., please feel free to contact us to customize a tuning fork vibrating densitometer.

Tuning Fork Density Meter/Concentration Meter - Sino-Inst

Product SKU: Tuning Fork Density Meter/Concentration Meter

Product Brand: Sino-Inst

Product Currency: USD

Product Price: 1599

Price Valid Until: 2029-09-09

Product In-Stock: InStock

Editor's Rating:
5