The online DP density meter measures liquid density from a hydrostatic pressure difference between two fixed points in the process. Range is 0.5 – 2.5 g/cc (500 – 2500 kg/m³), accuracy ±0.5% of reading, output 4–20 mA + HART. It handles slurries, corrosive acids, and viscous fluids where Coriolis tubes stall and tuning-fork probes foul, because the sensing diaphragms sit flush and see only pressure — not flow, not viscosity, not bubble content.

Sino-Inst builds the DP density meter around a high-accuracy differential pressure transmitter and two flush-diaphragm seals connected by oil-filled capillaries. Pick the variant below by your fluid, tank height, and wetted material, then confirm on the spec table.

Features of the Online DP Density Meter

• Hydrostatic measurement principle — density comes from ΔP between two known heights. No moving parts in the wetted path, no flow dependency, no viscosity limit.
• ±0.5% of reading accuracy — with a temperature-compensated DP cell and matched capillaries, density resolves to ±1 kg/m³ across the span.
• Slurry and viscous-fluid capable — flush diaphragm seals stay clean in tailings, cement slurry, black liquor, sugar syrup, and heavy residuum where Coriolis and tuning fork fail.
• No density calculation in the host — the transmitter outputs density directly in g/cc, kg/m³, °Bé, °Brix, or concentration %, so the PLC just reads a process variable.
• Wide wetted-material menu — 316L stainless standard; Hastelloy C-276, Monel 400, tantalum-lined, PTFE-capped options for acids, caustics, and chlorides.
• Mount on tank, bypass loop, or pipeline — tank-side flanges, insertion rods, inline bypass chambers, and open-sump stilling-well installations are all supported.
• 4–20 mA + HART + RS-485 Modbus RTU — drops straight into a DCS or PLC. Local LCD shows density, temperature, and percent concentration simultaneously.

Technical Parameters

Measuring range	0.5 – 2.5 g/cc (500 – 2500 kg/m³); concentration 0 – 100%
Accuracy	±0.5% of reading (±1 kg/m³ typical)
Repeatability	±0.1% of reading
Operating temperature	-40 °C to +120 °C (standard); up to 200 °C with extended capillary
Process pressure	up to 2.5 MPa (higher on request)
Viscosity limit	no upper limit — measurement is pressure-based, not flow-based
Wetted material	316L stainless (std); Hastelloy C-276, Monel 400, tantalum, PTFE-lined (opt)
Diaphragm seal	Flush-mount; 2″, 3″, 4″ or DN50/80/100 flange; sanitary tri-clamp available
Fill fluid	Silicone oil (std); inert halocarbon or high-temp fluorolube (opt)
Capillary length	1 m to 10 m, vacuum-sealed, armor-clad
Output	4–20 mA with HART 7; RS-485 Modbus RTU option
Power supply	24 VDC, loop-powered
Enclosure rating	IP66/67 aluminum alloy; Ex d IIC T6 available
Derived readings	Density, %solids, °Bé, °Brix, concentration %, specific gravity

DP Density Meter Working Principle

A column of liquid exerts a hydrostatic pressure proportional to its density times the height of the column: P = ρ × g × H. If you measure pressure at two points separated by a known vertical distance H in the same fluid, the difference between them depends only on the fluid density:

ρ = ΔP / (g × H)

The online DP density meter takes the two pressure readings through flush-mounted diaphragm seals connected to a differential pressure transmitter by oil-filled capillaries. Because the separation H is fixed by the mechanical installation, ΔP is a direct read-out of density. The transmitter applies a temperature correction using its own built-in Pt100, then outputs density, percent concentration, or °Bé through 4–20 mA / HART.

Because the diaphragms sense only pressure, the measurement is independent of flow rate, viscosity, and bubble content. The meter keeps reading through two-phase flow, solids concentrations up to ~60%, and high-viscosity liquors where Coriolis U-tubes stall. Solids that would coat a tuning-fork probe slide off a flush diaphragm. For a deeper comparison of principles, see our tuning fork density meter and Coriolis density meter product pages.

Models & Configurations

The DP head and transmitter stay the same across models. What changes is the wetted material, diaphragm style, and mounting fit. Pick the variant by your fluid and installation, then confirm on the spec table above.

Model	Wetted material	Mounting	Best for
Tank-side flanged	316L stainless	2 × DN50/DN80 PN16 flange on tank wall	Open tanks, atmospheric storage, general slurry service
Remote capillary seal	316L or Hastelloy C	Capillary 1 – 10 m between seals and DP cell	Long reach installations, high-temp or cryogenic service
Bypass loop	316L + isolation valves	Bypass chamber off main pipeline, DN50 inline	Pipeline mounting where tank access is limited
Anti-corrosion	Hastelloy C-276, tantalum, or PTFE-capped	Flange or clamp, per alloy	Strong acid, caustic, chlorinated fluids
Sanitary tri-clamp	316L electropolished, 3A cert	1.5″ or 2″ tri-clamp	Food, dairy, brewery, pharma

Other options: high-temp extended-diaphragm (up to 200 °C with fluorolube fill), submersible IP68 for open sumps and basins, and purged-style for fluids that would plate out on a diaphragm. Specify the medium and we’ll recommend the diaphragm alloy and fill fluid. For installation practices that affect DP accuracy, see our DP transmitter installation guide.

Applications

DP density meters are the default choice anywhere density or concentration is a controlled process variable and the fluid is too dirty, too viscous, or too two-phase for Coriolis or tuning-fork technology. The flush-diaphragm interface plus remote capillaries is what makes them field-robust.

• Mining & mineral processing — thickener underflow, tailings pipeline, cyclone feed density, dredger discharge
• Pulp & paper — black liquor density in chemical recovery, bleach liquor concentration
• Chemical — sulfuric acid, caustic soda, aqueous ammonia, ferric chloride concentration control
• Oil & gas — crude oil storage and transfer, heavy residuum, drilling mud density
• Food & beverage — sugar syrup °Brix, dairy concentrate, wort gravity, tomato paste
• Power — flue gas desulfurization limestone slurry density
• Water & wastewater — thickened sludge, lime milk dosing, MLSS monitoring

Related Density Measurement Products

Need sizing help? Our engineers match a DP density meter to your fluid, tank height, and wetted material, and ship a drawing plus quote the same day. Send the line data below and we’ll come back with a variant recommendation.

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The tuning fork density meter is an inline vibrating-fork sensor that measures liquid density from 0 to 2500 kg/m³ with ±1 kg/m³ accuracy. The fork tines sit directly in the process line — their resonant frequency shifts with the density of the fluid between them, giving a continuous 4–20 mA or Modbus signal with no moving parts. It handles slurries, corrosive acids, and two-phase fluids that break Coriolis meters, and it calibrates once and holds over years.

Sino-Inst ships the tuning fork density meter in eight mounting styles and several wetted-material options (316L, Hastelloy C, PTFE-lined, titanium). Pick the variant below by your fluid and pressure, then confirm with the specs table.

Features of Tuning Fork Density Meter

• Direct inline density — no sample loop, no rotameter, no density calculation from pressure/temperature. The fork sits in the live process line.
• ±1 kg/m³ accuracy, ±0.1 kg/m³ repeatability — matches most Coriolis meters on density alone, at a fraction of the cost.
• Handles bubbles and slurries — the vibrating fork keeps reading through two-phase flow and solids loading up to ~50%, where Coriolis tubes stall.
• No moving parts — no bearings, no seals, no wear. Typical service life is 8+ years on continuous duty.
• Wide wetted-material menu — 316L, 2205 / 2507 duplex, Hastelloy C, titanium, PTFE or PFA lining for acids and chlorinated solvents.
• Eight process connections — DN50 PN16, G1.5″ thread, 3″ tri-clamp, IDF, RJT sanitary, top-mounted rod up to 3 m, submersible IP68 cable, stirred-tank offset bracket.
• 4–20 mA + HART + Modbus RTU — drops straight into a PLC or DCS. The transmitter also reports °API, °Brix, concentration %, and specific gravity directly.

Technical Parameters

Measuring range	0 – 2.5 g/cc (0 – 2500 kg/m³); 0 – 100%
Accuracy	±0.001 g/cc (±1 kg/m³); ±0.5% of reading
Repeatability	±0.001 g/cc (±0.1 kg/m³); ±0.1%
Operating temperature	-50 °C to +150 °C
Working pressure	up to 4 MPa
Viscosity range	0 – 2000 cP
Temperature coefficient	< 0.1 kg/m³/°C after compensation
Wetted materials	316L / 2205 / 2507 stainless; Hastelloy C; Titanium; PTFE/PFA lined
Fork coating	Standard PTFE or PFA
Power supply	24 VDC, ≥50 mA
Output	4–20 mA, 0–1000 Hz, RS-485 Modbus RTU, HART
Output accuracy	±0.1% of reading or ±0.05% FS
Process connection	DIN 50 PN16, G1.5″ thread, 3″ tri-clamp, IDF, RJT sanitary
Enclosure rating	IP65 aluminum alloy housing
Derived readings	Density, °API, °Brix, concentration %, mass %, volume %, specific gravity

Tuning Fork Density Meter Working Principle

A piezo driver excites the two fork tines at their natural resonant frequency in vacuum — typically around 1300 Hz. When the fork is immersed in a liquid, the fluid adds effective mass to the tines, and the resonant frequency drops. The frequency shift is proportional to the liquid density.

The transmitter measures this frequency, applies a temperature correction (a built-in Pt100 reads process temperature), and converts to density in kg/m³, °API, °Brix, or concentration %. Because the measurement is based on a physical resonance of the fork — not a flow-dependent effect — density is independent of flow rate, viscosity (up to 2000 cP), and orientation. That’s why a tuning fork works in a storage tank as well as a high-velocity process line.

The fork is also insensitive to bubbles and solids. Small bubbles and particles pass between the tines without damping the resonance. This is the single biggest difference from a Coriolis density meter, which shuts down on two-phase flow.

Models & Configurations

The tuning-fork head is the same mechanical principle across all models. What changes is the wetted material, mounting style, and process fit. Pick the variant by your fluid and pressure, then confirm on the spec table above.

Model	Wetted material	Temp / pressure	Best for
Alcohol Concentration variant	316L stainless	-40–120 °C / 4 MPa	Breweries, distilleries, beverage batching
Submersible variant	316L + IP68 cable	-20–80 °C / 0.6 MPa	Tank bottoms, open reservoirs, settling ponds
Anti-corrosion variant	Hastelloy C-276 or PTFE-lined	-20–150 °C / 4 MPa	Acid, caustic, chlorinated solvents
Slurry / heavy-duty variant	Wear-plated 316L	-20–100 °C / 2.5 MPa	Dredging, mining tailings, cement

Other available configurations: threaded (G1-1/2) for standard process lines, flange-standard (DN50 PN16-20592) for slurry service including lime and mud, sanitary 3″ tri-clamp for pharma and food, top-mounted rod up to 3 m insertion for large tanks, and stirred-tank special with offset bracket. Custom wetted materials include Hastelloy C, titanium, 2205 and 2507 duplex stainless, and aluminum — specify the medium and we’ll recommend the right alloy.

Applications

Tuning fork density meters show up wherever density is the controlled process variable — concentration in blending, solids loading in slurry, end-point in reactors, interface detection in pipelines that batch multiple products. The fork handles bubbly fluids and slurries that would break a Coriolis meter.

• Petrochemical — batch interface detection in product pipelines (gasoline / diesel / jet fuel), density-based reactor end-point
• Mining & dredging — slurry solids concentration in thickener underflow, tailings transport, dredger discharge lines
• Brewing & beverage — wort gravity, fermentation progress, CIP verification
• Pharmaceuticals — solvent blending, API concentration monitoring, granulation liquor
• Food — sugar syrup °Brix, dairy cream fat content, concentrated juice blending
• Pulp & paper — black liquor density in chemical recovery
• Chemical — sulfuric acid concentration, sodium hydroxide concentration, aqueous ammonia
• Power — flue gas desulfurization limestone slurry density

Related Density Measurement Instruments

Need sizing help or a drawing review? Our engineers can match a tuning fork density meter to your fluid, pressure, and mounting, and ship a quote the same day. Send us the line data below and we’ll get back with a variant recommendation and price.

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Features of Split Type Density Meter for Liquids

1. Input design, easy to use
2. Continuous online monitoring
3. Temperature compensation
4. Integrated design, maintenance-free
5. IP68 waterproof design, suitable for deep water measurement
6. Explosion-proof design, convenient for use in special industries

Technical Parameters

Measuring range:	0 – 3 g/cc (0 – 3000 kg/m3)
Calibration range:	0.6 – 1.25 g/cc (600 – 1250 kg/m3)
Measurement accuracy:	± 0.001 g/cc (± 1 kg/m3)
Repeatability:	± 0.0001 g/cc (± 0.1 kg/m3)
Operating temperature range:	-50℃ ~ +200℃
Maximum working pressure:	20Mpa
Fluid Viscosity Range:	0 – 20000 cP
Temperature coefficient:	0.1 kg/m3/℃ (after correction)
Pressure Effect:	Negligible
Built-in temperature sensor:	PT100
Wetted material:	Stainless steel, Hastelloy C22, manganese alloy 400, titanium alloy, etc.
Fork Coating:	Standard, PTFE or Electropolished
Power supply:	20 – 28 VDC, 35 – 45 mA
Analog output:	4 – 20 mA, isolated, not self-powered
Output accuracy (20°C):	± 0.1% of reading or ± 0.05% FS
Output repeatability (-40 ~ +85°C):	± 0.05% FS
Protection class:	IP65
Shell:	Aluminum alloy

Technical advantages:

• Direct density or concentration readings, available engineering units include: g/cm3, kg/m3, specific gravity, °Brix, °Baume, °Plato, °GL, percent solids, etc.;
• Suitable for flowing or static liquids;
• Suitable for pipeline and tank density measurement;
• Integrated structure, no moving parts;
• Standard industrial and hygienic process connections;
• The instrument has a built-in temperature sensor to provide accurate temperature compensation;
• Online remote calibration, digital local display;
• Factory multi-point linear correction, higher precision;
• On-site recalibration: no standard reference source, no experimental calibration, no process interruption;
• The converter is compatible with three installation methods: wall-mounted, embedded, and desktop;

Split Type Density Meter for Liquids Applications

Split type density meter for liquids can be widely used in closed or open tanks, tanks, diversion channels and open channels.

Density meter for liquids is also widely used in the detection of sediment content in hydrological stations. In the petrochemical industry, brewing industry, food industry, pharmaceutical industry and mineral processing (such as clay, carbonate, silicate, etc.), it is specifically used for interface detection in multi-product pipelines in the above industries, density detection of stirred mixtures . Reactor endpoint monitoring, separator interface detection.

Application industry

• Measurement of Lime Slurry Density and Concentration in Desulfurization Industry
• Density and concentration measurement of ammonia water in the denitrification industry
• Density and concentration measurement of pulp in mineral processing industry
• Density and concentration measurement of proportioning liquids in the surface treatment industry
• Density and concentration measurement of slime during coal conveying
• Density and concentration measurement of syrups
• Density and concentration measurement of starch emulsions
• Density and concentration measurement of medicinal liquids and concentrates in the pharmaceutical industry
• Density and concentration measurement of chemical reagents such as alcohol and chemical liquids
• Density and concentration measurement of petroleum and oil-synthetic products

More Density meter and measurement analysis solution

The Split Type Density Meter for Liquids can measure the density or concentration of any liquid and also output density, concentration, Baume and temperature simultaneously.

Density Meter for Liquids is an instrument for measuring fluid density using the principle of vibration. It is used to measure fluid density in real time. Fluid density directly depends on the vibration frequency of the fork. At the same time, a temperature sensor provides temperature compensation, and performs pressure compensation and viscosity compensation for the pressure value before leaving the factory.

Split Type Density Meter for Liquids is widely used in reaction kettle, liquid separation, desulfurization and denitrification, ammonia gas recovery, ammonia production, mixing and stirring, petroleum and petrochemical, brewing equipment, food processing, extraction and concentration of traditional Chinese medicine, acid preparation, etc.

We, Sino-Inst, manufacture and supply Split Type Density Meter for Liquids. Our Split Type Density Meter for Liquids is widely exported to various countries. Including the United States, Britain, Australia and other countries. If you need Density Meter for Liquids, please contact our sales engineers!

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Features of Online Alcohol Density Meter

1. With analog signal 4 ~ 20mA and digital signal RS485 remote transmission;
2. Real-time display of standard alcohol content at 20°C; real-time indication of alcohol concentration and temperature;
3. You can directly enter the instrument menu to set parameters and debug on site, which is easy to operate;
4. It has the functions of pure water calibration, fine-tuning of measured value and temperature compensation;
5. Online real-time measurement, which can be directly used for production process control;
6. The parts in contact with the liquid are made of 316 stainless steel, which is safe, hygienic and has good corrosion resistance.

Technical Parameters

Signal mode:	Four-wire system
output signal:	4~20 mA (active output) or RS 485 (Modbus RTU standard protocol, communication rate 9600)
power supply:	24VDC (resistive elements cannot be loaded externally or connected in series with PLC)
Measuring range:	0~100%, according to the usage, can be calibrated to measure in a certain range
Accuracy:	1%,
Explosion-proof grade:	Ex dIIB T6 Gb
Work pressure:	< 1 MPa
Operating temperature:	– 10~ 85℃
Electrical Interface:	M 20×1.5
Process interface:	3〞Sanitary Quick Release Chuck Ø91 or 2〞Sanitary Quick Release Chuck Ø64
Wetted parts:	316 stainless steel

The accuracy	±0.001g/cm3	±0.25%
The scope of work	0～2g/cm3	0～100%
repeatability	±0.0001g/cm3	±0.1%
Process temperature effect (corrected)	±0.0001g/cm3	±0.1% （per ℃）
Process pressure effect (corrected)	can be ignored	can be ignored

(1) The above accuracy applies to the calibration range of 0.8–1.5g/cm3 (800–1500 kg/m3).
(2) The maximum viscosity of the liquid can reach 2000cP.
(3) Temperature effect refers to the maximum measurement deviation caused by the process fluid temperature deviating from the 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.

Process temperature	Standard: –25℃～+120℃
	Customized: –25℃～+150℃
Ambient temperature	–25℃～+85℃
Temperature Coefficient	20ppm/℃ (after calibration)
Built-in temperature sensor	temperature chip

Working pressure	Standard	Within 2.5MPa
	Special custom	Within 6.3MPa
Test pressure	Tested at 1.5 times the maximum working pressure
Actual maximum working pressure is limited by process connection rating

Online Alcohol Density Meter applications

The online alcohol density meter uses a sound wave frequency signal source to excite the metal vibrator. And make the vibrator vibrate freely at the center frequency. This frequency correlates with the density of the contacting liquid. Therefore, the density of the liquid can be measured by analyzing the frequency. Further temperature compensation can eliminate the temperature drift of the system. As for the concentration, the concentration value at a temperature of 20°C can be calculated according to the relationship between the corresponding liquid density and concentration.

Liquor concentration, density and temperature measurement in liquor production process section:

1. Alcohol degree measurement in the wine picking process during the brewing stage;
2. Monitoring of alcohol content in wine storage tanks;
3. Measurement of the concentration of blended craft wine;
4. Measurement of alcohol concentration in filling;

Online Alcohol Density Meter is suitable for various ways such as pipeline installation or container wall insertion installation. Both dynamic and static measurements can be made. Installation method Sanitary quick-loading chuck type.

Alcohol Density – Concentration Measurement Solution

Online Alcohol Density Meter for Comprehensive wine extraction

The production line of the distillation workshop needs to carry out comprehensive collection of alcohol concentration and implement intelligent and digital production first. The grains in the tower are distilled and the wine flows into the tank through the condenser.

The system will distinguish the main effective wines of the head and tail wines according to the concentration of the wines. Equipped with a main fully closed sanitary automatic control valve. Guarantee the qualified delivery conditions for comprehensive and effective liquor. This process section is mostly used for Maotai-flavored wine picking.

The first stage: As the distillation time progresses, what follows is a head with impurities. The system sets the collection and control of wine head by time. About 5kg, at this time the valve opens. The wine head flows into the tank until the set time is reached, and the valve is closed. It can be adjusted according to different liquor brewing processes.

The second stage: the main wine is collected comprehensively through wine tanks. Measure the alcohol concentration in real time with an alcohol density meter to ensure that the comprehensive alcohol content reaches the qualified alcohol content and make effective adjustments.

The third stage: tail wine collection. When the alcohol content is less than the minimum setting, close all valves. Open the tail valve for effective collection.

Online Alcohol Density Meter for Segmented wine extraction

The production line of the distillation workshop needs to collect the alcohol concentration in sections and take the lead in implementing intelligent and digital production. The grains in the tower are distilled and the wine flows into the tank through the condenser. The system will be divided into the following three stages of control according to the different alcohol concentrations, with a fully closed sanitary automatic control valve.

The first stage: With the passage of distillation time, the wine head with impurities comes out. The system sets the collection and control of the wine head through time. It is about 5kg. At this time, the valve opens. The wine head flows into the tank. Until When the set time is reached, the valve closes. It can be adjusted according to different liquor brewing processes.

The second stage: After the separation of the beer head is the focus of the process. At this time, the valve is opened, and the system needs to collect and store the puree with alcohol concentration of Luzhou-flavored (75%~55%)/sesame-flavored (≥20%) in the tank. Carry out grading, and when the corresponding alcohol content range is reached, the corresponding valve is opened for grading collection. When the concentration meter detects that the alcohol content is lower than the minimum range value, the valve is closed. Remarks: Because different brewing processes require different degrees of alcohol extraction, the system can directly set and extract alcohol degrees according to the actual needs of the winery.

The third section: Tail wine collection, when the alcohol content is less than the minimum setting, close all valves. Open the tail valve for effective collection.

More Density meter and measurement analysis solution

Alcohol production in alcohol factories is completed by multiple processes, mainly controlled by humans. In the process of distilling and extracting alcohol, operators have been operating with experience. Inevitably there are errors affecting the alcohol concentration, which can lead to production defects. The incoherence of the distillation process has largely led to the instability of alcohol, which has become a persistent disease that has plagued the alcohol industry for many years. For a long time, the wine industry has spared no effort to break through the traditional production process and realize production automation.

Our company Sino-Inst has been committed to the development and manufacture of density and concentration measuring instruments. After years of painstaking research and experimentation, it has finally successfully developed an environment that can adapt to the high temperature and humidity in the distillation and extraction process. Online Alcohol Density Meter-Alcohol Concentration Meter can promote the automation of distillation and extraction process in alcohol industry.

If you need Online Alcohol Density Meter-Alcohol Concentration Meter, please feel free to contact our sales engineers!

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Features of Coriolis Density Meter

1. The 4-wire transmitter with an integrated structure has no moving parts and is easy to maintain; the 4-wire transmitter has 4-20mA output;
2. Real-time display of five-digit density value, four-digit decimal (one digit for concentration), real-time indication of current and temperature;
3. You can directly enter the instrument menu to set parameters;
4. It is easy to install and use, and the reading can be displayed when the flange surface touches the liquid;
5. It is used for fluid or static liquid, suitable for pipeline installation or installation on container wall, etc.;
6. Density and concentration have the functions of pure water calibration, fine-tuning of measured value and temperature compensation;
7. Continuous online measurement without process interruption, can be directly used for production process control;
8. All parts in contact with liquid are made of 316 stainless steel or polytetrafluoroethylene, which is safe, hygienic and has good corrosion resistance;
9. Measuring high viscosity and non-Newtonian flow can also measure uniform multiphase flow;

Technical Parameters

Accuracy	±0.001g/cc	±1.0kg/m3
The scope of work	0～3g/cc	0～3000kg/m3	0～187.4 lb/ft3
Repeatability	±0.001g/c	±0.1kg/m3	±0.006lb/ft3
Process temperature effect (corrected)	±0.001%g/cc）	±0.1kg/m3	(per °C)
Process pressure effect (corrected)	can be ignored
(1) The above accuracy is applicable to the calibration range of 0.6-1.25g/cc (600-1250kg/m3) (2) When a long rod is used, the maximum viscosity of the liquid can reach 500CP, but if it is used, the maximum viscosity of the liquid can reach 20000CP. (3) Temperature effect refers to the maximum measurement deviation caused by the process fluid temperature deviating from the factory calibration temperature. (4) Pressure effect is defined as: the change in sensor flow and density due to process pressure deviation from calibration pressure.

Process temperature	–10℃～+60℃
Ambient temperature	–10℃～+85℃
Temperature Coefficient	O.1kg/m3/℃ (after correction)
Built-in temperature sensor	PT100
Wetted parts	Stainless steel 316L, titanium, etc. can be customized
Shell	IP65, aluminum alloy
Tine polishing	Standard, PFA coated or electropolished
Working pressure	3000psi (207bar)
	1450psi (100bar)
Test pressure	Tested at 1.5 times the maximum working pressure
Actual maximum working pressure is limited by process connection rating
Process connection type	flange
	Clamp
	thread
Explosion-proof certification	Ex d Ⅱ B T6 Gb
Power requirements	24VDC,50mA
Output	Four-wire system, 4-20mA transmission 4-20mA, optional RS485-Modbus RTU communication
Viscosity range	0-20000CP

Fluid and Material Compatibility

Type	Name	Molecular formula	Concentration (%)	316L	Hastelloy	Titanium alloy	zirconium	PTFE
Acid	Hydrochloric acid (without hydrofluoric acid)	HCI	0-40	×	○	×	☆	☆
	sulfuric acid	H2SO4	0-50	○	☆	○	☆	☆
		H2SO4	50-75	×	○	×	○	☆
		H2SO4	75-98	○	☆	○	○	☆
	nitric acid	HNO3	0-100	○	○	○	○	☆
	phosphoric acid	H3PO4	0-98	×	×	×	×	☆
Alkali	sodium hydroxide	NaOH	0-50	☆	☆	☆	○	☆
	Potassium hydroxide	KOH	0-50	☆	☆	☆	○	☆
	Calcium hydroxide	Ca（OH）2	0-50	☆	☆	☆	○	☆
Salt	Sodium chloride	NaCI	0-50	×	☆	☆	☆	☆
	ammonium chloride	NH4CI	0-50	×	☆	☆	☆	☆
	ammonium sulfate	(NH4)2SO4	0-50	×	☆	☆	☆	☆
Others	carbamide	(NH2)2CO	0-100	☆	☆	○	☆	☆
	sodium hypochlorite	NaOCI	0-16	×	○	×	☆	☆
	hydrogen peroxide	H2O2	0-90	☆	☆	○	☆	☆
☆Recommended ○ Use under specific concentration and temperature limits × Do not use

Featured Types of Coriolis Density Meters-Concentration Meters

Coriolis density meter industrial applications

The Coriolis density meter is based on the principle of special laws under the action of the Coriolis force of the moving liquid. The Coriolis force is related to the density of the liquid, so as to measure the density of the liquid; then according to the relationship between density and concentration The relational table obtains concentration values at a temperature of 20°C.

Coriolis density meter can be widely used in the detection of oil refining and blending in the petrochemical industry. The food industry is used in sugar industry, vegetable oil and beverage processing, etc. Production site, paper industry, measurement of weak acid-base solution in chemical industry, wine industry, salt, printing and dyeing and other industries. Due to the large flow pipe, it is especially suitable for occasions that are not dry or viscous. It is suitable for pipe installation.

Medium limitation		Contain gas	Maximum Liquid Viscosity
Regular liquid	Acid and alkali solution
316L	Titanium	Contain gas Generally do not use	20000CP

Typical application conditions:

Petroleum and petrochemical industry	— Quality Control — Continuous Online
Wine industry	— Quality control — Continuous online inspection
Organic and Inorganic Chemical Materials	— Acid/base concentration control
Pharmaceutical Industry	— Traditional Chinese medicine concentration, alcohol recovery
Battery industry	— Concentration of lithium hydroxide, electrolyte, sulfuric acid solution
Mineral processing	— Clays, carbonates, silicates

More Density meter and measurement analysis solution

Coriolis mass flowmeter is a kind of instrument that is commonly used at present and has relatively high stability and reliability of measurement accuracy. Coriolis mass flow meters are not only capable of measuring mass flow meters from Micro Motion, but also of media density.

When the Coriolis Density Meter measures density, its measuring tube vibrates continuously at a certain resonant frequency. Because the resonance frequency is a function of the fluid density. When fluids of different densities fill the vibrating tube, its vibration frequency will also change. Therefore, measuring the frequency change of the vibrating tube completes the density measurement. The linear relationship between the density and the vibration frequency of the vibrating tube.

This method is accurate and reliable in measurement, and is suitable for a wide measurement range of various fluid densities. The pressure loss of Coriolis Density Meter is very small, and it has inherent advantages in measuring the density of viscous fluids such as mud.

There are more and more requirements for density measurement in the current production process, and the accuracy of density measurement directly affects the quality of production process.

We Sino-Inst manufacture and supply many kinds of Coriolis Density Meters-Concentration Meters. Our Coriolis Density Meters are exported to various countries like USA, UK, Germany, Nigeria, Saudi Arabia, Singapore, etc. If you need to measure density, please feel free to contact our sales engineers.

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Features of Optical Density Meter

• Fully integrated “plug and play, maintenance-free” digital measurement for monitoring and control;
• Provide materials including 316L, PTFE, etc.;
• continuous measurement;
• No moving parts, less maintenance;
• Concentration 4-20mA output;
• Provide temperature sensor;
• Suitable for a variety of acids, alkalis, organic solutions;
• Not easily affected by temperature and flow rate;
• Suitable for installation in tanks and pipelines;
• A small amount of solids and air bubbles are allowed;
• Passed explosion-proof certification;

Technical Parameters

Accuracy	±0.5%
The scope of work	0~100% (20°C), according to the usage, it can be calibrated to a certain range
repeatability	±0.2%
Process temperature effect (corrected)	±0.001% (per ℃)
Process pressure effect (corrected)	can be ignored
Process temperature	–10℃～+60℃
Ambient temperature	–10℃～+45℃
Temperature Coefficient	O.1%/m3/℃ (after correction)
Built-in temperature sensor	temperature chip
Wetted parts	316L, polytetrafluoroethylene
Glass	Acid and alkali resistance
Shell	IP65, aluminum alloy
Working pressure	0.8MPa
Test pressure	Tested at 1.5 times the maximum working pressure
Actual maximum working pressure is limited by process connection rating
Process connection type	flange
	Clamp
Explosion-proof certification	Ex d ⅡC T6 Gb
Power requirements	24VDC,50mA
Output	Four-wire system, 4-20mA
Viscosity range	＜5000MPa.s

Fluid and Material Compatibility

Type	Name	Molecular formula	Concentration (%)	316L	Hastelloy	Titanium alloy	zirconium	PTFE
Acid	Hydrochloric acid (without hydrofluoric acid)	HCI	0-40	×	○	×	☆	☆
	sulfuric acid	H2SO4	0-50	○	☆	○	☆	☆
		H2SO4	50-75	×	○	×	○	☆
		H2SO4	75-98	○	☆	○	○	☆
	nitric acid	HNO3	0-100	○	○	○	○	☆
	phosphoric acid	H3PO4	0-98	×	×	×	×	☆
Alkali	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	×	☆	☆	☆	☆
Others	carbamide	(NH2)2CO	0-100	☆	☆	○	☆	☆
	sodium hypochlorite	NaOCI	0-16	×	○	×	☆	☆
	hydrogen peroxide	H2O2	0-90	☆	☆	○	☆	☆
☆Recommended ○ Use under specific concentration and temperature limits × Do not use

Working principle of Optical Density Meter

Imagine you have a flashlight. When you shine it through a clear glass of water, almost all the light passes through. But if you shine it through a dark-colored drink, less light will pass through because the drink is denser.

An Optical Density Meter works a bit like that flashlight. It uses light to see how “thick” or “dense” a sample is. Here’s how:

Light Source: The meter has a light that shines through the sample.
Sample: This is what you want to test, like a liquid.
Detector: On the other side of the sample, there’s a part that catches and measures the light that comes through.
If a lot of light passes through, the sample is less dense. If only a little light passes through, the sample is more dense.

The Optical Densitometer is Based on the Propagation Law of the Spectrum in the Liquid. Sampling is Performed by High-Resolution Sensor. Analyzed AN d processed by software. Obtain the Regularity of the Concentration. The then Through Temperature Compensation. various liquids or liquid mixtures.

Medium limit		bubbles, flow rate	Maximum Liquid Viscosity
Particles	transparent
Trace particles	clear, pure liquid	a small amount of bubbles	5000MPa.s
		Velocity > 1.5m/s

Video: https://www.youtube.com/embed/N8DOxmFBrhE

Optical Density Meter Industrial Applications

Imagine factories where they mix and create things like paint, drinks, or even medicine. They need to make sure everything is just right – not too thick, not too thin, and with the right amount of ingredients. That’s where the Optical Density Meter comes in handy.

• In the petrochemical industry, it can be widely used in the detection of petroleum, oil refining and oil blending;
• In the food industry, it is used in the production sites of grape juice, tomato juice, fructose syrup, vegetable oil and soft drink processing;
• dairy industry;
• paper industry;
• Measurement of alkaline solution;
• brewing alcohol;
• Printing and dyeing industry: measure ammonia concentration.
• Organic and Inorganic Chemical Materials: Sodium Hydroxide.
• Measurement of chemical carbamide, detergent, ethylene glycol, acid-base and polymer density.
• It can also be used in mining brine, potash, biopharmaceutical and other industries.
• Brewing and Beverages: Companies that produce beverages such as fruit juice or beer use this tool to check sugar content. More sugar means the drink may be sweeter and thicker.
• Pharmaceutical Manufacturing: When companies manufacture pharmaceuticals, they need to ensure that the mixture is perfect. A gauge can help check this.
• Paint making: Have you ever noticed that some paints are thick and some are thin? The factory uses a densitometer to get just the right consistency.
• Water Treatment: This meter can help check how clean the water is. If the water is too “thick” and contains unwanted material, more cleaning may be required.
• Agriculture: Farmers use it to check the health of plants. If plants are not healthy, they may not be able to absorb enough light. Meters can provide relevant clues.

These are just a few examples. There are many places where knowing how “thick” or “dense” something is can be very useful, and that’s why the Optical Density Meter is an important tool in industries.

Typical applications:

Denitrification industry	— Measure ammonia concentration (0~30%)
Wine industry	— Quality control — Continuous online inspection
Organic and Inorganic Chemical Materials	— Acid/base concentration control
Pharmaceutical Industry	— Traditional Chinese medicine concentration, alcohol recovery
Battery industry	— concentration of lithium hydroxide, electrolyte, sulfuric acid solution
Mineral processing	Clay, carbonate, silicate

More Density meter and measurement analysis solution

When it comes to measuring the “thickness” or “Density” of liquids, the Optical Density Meter-Liquid Densitometer is a top choice.

Optical Density Meter-Liquid Densitometer uses the law of spectrum propagation in liquid to measure the density of transparent liquid. The liquid must have a certain degree of transparency, which is suitable for pipeline installation or installation on the wall of the container.

Our Sino-Inst Optical Density Meter is widely applicable to the concentration of various liquids or liquid mixtures.

At Sino-Inst, we aren’t just Optical Density Meter supplier – we’re experienced manufacturer. We understand the ins and outs of Optical Density Meter because we’ve crafted it with care. Need something special? We support customizations to meet your specific needs. Trust in our experience and expertise. Ready to elevate your measurements? Choose Sino-Inst today!

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Micro Vibrator Handheld Density Meter Features:

Portable micro-vibrator digital density meter, also known as Handheld Density Meter, adopts portable and hand-held design. Used to measure the temperature and density (concentration) of liquids in tanks. After the measurement is completed, the data will be displayed automatically. Portable design, easy to operate and easy to carry.

1. Handheld density meter with digital LCD screen and various display contents.
2. Wide measurement range, simple operation, high measurement accuracy and fast test speed.
3. The pure water density meter is easy to calibrate, and standard substance calibration can be performed.
4. The sample demand is small, only about 100ml liquid is needed

Technical Parameters:

• Density range: 0~2g/ml(g/cm3)
• Density accuracy: 0.003 g/ml ,
• Resolution: 0.0001,
• Repeatability: 0.0005
• Medium temperature: 0~100℃ (liquid fluidity)
• Ambient temperature: -40~85℃
• Temperature Compensation: Automatic
• Material of internal parts placed in the liquid: stainless steel 316L, ceramics, zirconia, etc.
• Tine Polish: Standard, PFA Coated or Electropolished

Working Principle

The sensor of the Micro Vibrator Handheld Density Meter is designed according to the principle of component vibration. This vibrating element is similar to a two-toothed tuning fork, the body of which is vibrated by a piezoelectric crystal located at the root of the tooth. The frequency of the motion is detected by another piezoelectric crystal. Through phase shifting and amplification circuit, the fork body is stabilized on the natural resonant frequency. When the medium flows through the fork, the resonance frequency changes due to the change of the medium quality.

Working principle:
The density and vibration frequency of the medium conform to the following mathematical formula: D=K0+K1T+K2T2

Formula:
D = Density of the measured medium
T = natural frequency of the fork
T2=The frequency when the measured medium flows through the fork body

K0, K1, K2=constant According to this formula, the accurate medium density value can be calculated through the electronic processing unit.

Technical Advantages

Tuning fork vibrating density meter with microprocessor-based electronic switching unit combining signal processing, calculation and diagnostic functions.

In addition to convincing measurement accuracy and reliability. While measuring density and temperature, parameters such as basic density, °API, Brix, concentration percentage, mass percentage, volume percentage, and specific gravity can also be calculated.

Handheld Density Meter Applications

The Micro Vibrator Handheld Density Meter is a versatile instrument crucial for several industries. It works by using tiny vibrations to measure the density of fluids.

Key Industries:

• Petroleum and Chemical: Monitoring the quality of fuel and other chemical products.
• Brewing: Ensuring the consistency and quality of alcoholic beverages.
• Food Production: Checking the density of ingredients and final products for quality control.
• Pharmaceuticals: Ensuring drug formulations are consistent and up to standards.
• Mineral Processing: Used in the assessment of clays, carbonates, silicates, and more.

Applications:

• Detecting the interface in multi-product pipelines.
• Checking the density of mixed fluids.
• Monitoring reaction endpoints in reaction kettles.
• Interface detection in separators.

Case Examples: Handheld density meter for petroleum products

Oil Pipeline Interface Detection:

Scenario: When transporting different types of oil in a single pipeline, it’s crucial to detect when one type ends and another begins.
Use of Portable Density Meter: The meter helps in accurate detection, preventing mixing and ensuring product purity.
Parameters: Crude oil density: around 0.8 to 0.93 g/cm³; Diesel density: 0.8 to 0.85 g/cm³.

Fuel Quality Assurance at Refineries:

Scenario: A major refinery needs to regularly check the quality of its gasoline.
Use of Handheld Density Meter: By using the meter, technicians can instantly measure the density at various stages of production.
Parameters: Desired density range: 0.725 to 0.775 g/cm³.

Lubricant Production Quality Control:

Scenario: A factory produces motor lubricants and wants to maintain a consistent product.
Use of Portable Density Meter: By regularly checking the density, they can ensure the lubricant has the right balance of additives and base oil.
Parameters: Desired density range: 0.85 to 0.89 g/cm³.

So, you should know that the Micro Vibrator Handheld Density Meter is an important tool, especially in the field of petroleum products.

By ensuring accurate and consistent measurements, it’s an invaluable tool for quality and process control.

More Digital Density Meters and Detecting Instruments

The Handheld Density Meter, Micro Vibrator Digital Density Meter for Petroleum Products, is a game-changer in the industry. Whether it’s for quality control in refineries, detecting oil types in pipelines, or ensuring consistent lubricants, this tool is essential. Quick, accurate, and user-friendly, it plays a pivotal role in maintaining the highest standards in petroleum-related operations.

If you’re in need of such a tool or have specific requirements, look no further! We, at Sino-Inst, pride ourselves on being experienced manufacturers and suppliers in this field. Our rich expertise ensures that you receive the best product tailored to your needs. Interested in custom solutions? We’ve got you covered. Reach out today, and let’s enhance your petroleum processes together. Contact Sino-Inst now!

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Features of Portable Density Meter

• Used to measure the temperature and density (concentration) of liquids in tanks. The data will be displayed automatically after the measurement is completed.
• Portable design, easy to operate and easy to carry.
• Wide measurement range, suitable for continuous and uninterrupted measurement. The measurement accuracy is high and the test speed is fast.
• Low maintenance, no moving parts, high durability.
• Built-in temperature sensor to monitor the temperature of the liquid to be tested at all times.
• Provide customization including 316L, titanium and other materials
• Support the calculation of density and standard concentration
• Automatically provide temperature compensation, with automatic calibration function

Technical Parameters

1. Power supply: Built-in 3.7VDC lithium battery with rechargeable battery;
2. Concentration range: 0~100% (20°C), according to the usage, it can be calibrated to a certain range;
3. Density range: 0~2g/ml, according to the usage, it can be calibrated to a certain range;
4. Concentration accuracy: 0.5%, resolution: 0.1%, repeatability: 0.2%;
5. Density accuracy: 0.003 g/mL , resolution: 0.0001, repeatability: 0.0005;
6. Medium temperature: 0~60°C (liquid state) Environment degree: -40~85°C;
7. Medium viscosity: <2000mpa·s;
8. Response speed: 2S

Physical Iindicators

1. Interface material: stainless steel
2. Cable material: anti-corrosion silicone rubber
3. Wetted parts: 316 stainless steel, special requirements are available

Product Performance

The accuracy	±0.003g/cm3	±3.0kg/m3
Working scope	0至3g/cc	0至3000kg/m3
Repeatability	±0.001g/cc	±1kg/m3
Process temperature effect (corrected)	±0.0005g/cm3	±0.5kg/m3

Temperature Specification

Process temperature	–20°C +100°C
Ambient temperature	–20℃  +85℃
Temperature Coefficient	0.1kg/m3/°C (after calibration)
Built-in temperature sensor	PT100

Structural Materials

• Wetted Parts: Stainless Steel 316L, Hastelloy, Zirconium
• Tine Polish: Standard

Liquid Viscosity Range

• Viscosity requirement: < 1000MPa

Liquid and Material Compatibility

Type	Name	molecular formula	Concentration (%)	316L	Hastelloy	Zirconium
Acid	Hydrochloric acid (without hydrofluoric acid)	HCI	0-40	×	○	☆
	sulfuric acid	H2SO4	0-50	○	○	☆
		H2SO4	50-75	×	○	○
		H2SO4	75-98	○	○	○
	nitric acid	NHO3	0-100	○	○	☆
	phosphoric acid	H3PO4	0-98	○	☆	×
Alkali	sodium hydroxide	NaOH	0-100	○	☆	×
	Potassium hydroxide	KOH	0-50	○	☆	☆
	Calcium hydroxide	Ca（OH）2	0-50	○	☆	○
Others	carbamide	(NH2)2CO	0-100	☆	☆	☆
	sodium hypochlorite	NaOCI	0-16	○	○	×
	hydrogen peroxide	H2O2	0-90	☆	☆	×
☆ Recommended O Use under specific concentration and temperature limits X Do not used

Dimensions

Portable Tuning Fork Density Meter working principle

The tuning fork density/concentration meter is used to measure the density or concentration of liquid media. Density or concentration measurement is an important process control in the product manufacturing process.

Tuning fork densitometers can be used as indicators for other quality control parameters such as solids content or concentration values. It can meet various measurement requirements of users for density, concentration and solid content.

A tuning fork portable density meter that uses an acoustic frequency signal source to excite the metal fork. And make the fork vibrate freely at the center frequency. This frequency correlates with the density of the contacting liquid. Therefore, the density of the liquid can be measured by analyzing the frequency, and then the temperature compensation can eliminate the temperature drift of the system.

As for the concentration, the concentration value at a temperature of 20°C can be calculated according to the relationship between the corresponding liquid density and concentration.

This device integrates density, concentration and Baume into one. And has a variety of liquids to choose from.

Particle limit		Gas	Maximum Liquid Viscosity
Particle diameter	Suspended particles%
<10 microns	＜=40%	Generally do not use	＜1000cp
10~50 microns	＜=20%

Applications

Portable density meters have a wide range of industrial applications across different sectors, including the petrochemical, brewing, food, pharmaceutical, mineral processing, oil, chemical, food and beverage, battery and electrolyte, ammonia preparation, laboratory, and desulfurization industries. They are specifically used for interface detection in multi-product pipelines, density detection of stirred mixtures, end point monitoring of reactors, and interface detection of separators.

Some specific examples of their use include:

• In the petrochemical industry, portable density meters are used to detect interfaces in multi-product pipelines and to monitor the density of fuel blends.
• In the food industry, portable density meters are used to monitor the density of food products during production, ensuring consistent quality.
• In the pharmaceutical industry, portable density meters are used to measure the density of different materials during drug formulation.
• In the battery and electrolyte industry, portable density meters are used to measure the density of electrolyte solutions, which is important for battery performance.

Overall, portable density meters are a versatile tool for a wide range of industries, helping to ensure consistent quality and optimize production processes.

More Digital Density Meters

More Detection and Analysis Sloutions

Portable Density Meter is used to measure the density or concentration of liquid media in tanks and pipes. After the measurement is completed, the data will be displayed automatically. Portable design, easy to operate and easy to carry.

Density or concentration measurement is an important process control in the product manufacturing process. Our Portable Density Meter – Portable Tuning Fork Density Meter can be used as an indicator of other quality control parameters like solids content or concentration values. It can meet various measurement requirements of users for density, concentration and solid content.

We, Sino-Inst, are a professional density meter manufacturer. We manufacture and supply Portable Density Meter, Online Tuning Fork Density Meter, Differential Pressure Density Meter, Split Density Meter, Coriolis Density Meter, etc.

If you need to monitor density or concentration, please feel free to contact Sino-Inst sales engineers.

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More Detection and Analysis Sloutions