Digital Portable Density Meter DA-130N

Digital Portable Density Meter DA-130N
Portable Density / Specific Gravity Meter DA-130N

Reliable, compact and ergonomic:
The portable DA-130 density/specific gravity meter is an ideal tool for quick and accurate measurements of liquids of different viscosities. The well though-out design of its sampling mechanism ensures hassle-free filling and quick and reliable cleaning of the measuring cell. In spite of its compact size and low weight the DA-130 offers many features you would expect only from a bench top unit.

The ideal choice for many applications
Be it API degrees, Brix, Proof, Plato, Baumé , sulphuric acid concentration or simply density or specific gravity: The DA-130N displays the results directly in the desired unit and automatically converts the result to the reference temperature.

Full-fledged data handling
The DA-130 can not only store up to 1100 measurement results in its internal memory, it stores these values together with sample identifications and the date and time when the measurements have been performed. Thanks to a built-in IrDA interface, measured results can be transmitted to a printer or a personal computer at anytime.

Easy operation
A graphical backlit display and an intuitive menu structure provide an easy operation and a clear visualization of the measured values.

Long battery life
In addition to a low power consumption and an automatic power off function an excellent visibility of the measuring cell ensures a long battery life: With the DA-130 there is no need to activate any power-hungry illumination to detect air bubbles or contamination in the measuring cell.

Hassle-free sampling and cleaning
The patented springless sampling mechanism of the DA-130 facilitates an effortless controlled up and down movement of the piston in the sampling pump: Slow to fill the cell with samples which tend to degas, quick to rinse the cell after having measured a sticky product.

More accurate results
Density depends on the temperature. The temperature of the sample must therefore be accurately determined and the measured value must mathematically be converted to the reference temperature using a sample specific temperature compensation coefficient. The auto stability function of the DA-130 makes sure the temperature of the sample is stable when the reading is taken, 10 user defined temperature compensation coefficients provide an accurate conversion of the measured value to the reference temperature. 

Details

Easy sampling - reliable cleaning – more accurate results

Air bubbles or residues of previously measured samples in the cell are the main sources of error when performing measurements with a digital density meter. Two things are required to avoid these sources of error: A well conceived sampling mechanism and an excellent visibility of the measuring cell.

Thin and volatile fluids must very slowly be filled into the measuring cell in order to prevent the formation of bubbles in the cell whereas the solvents used for cleaning must be pumped through the cell at high speed in order to achieve a thorough cleaning. A sampling mechanism which can cope with these requirements is a deciding factor for reliable results. The DA-130N is equipped with a springless sampling mechanism: This patented mechanism allows to easily control the speed of aspiration and discharge. It can aspire even viscous liquids with a viscosity of up to 2'000 mPa·s. If higher viscous products must be measured, the sampling mechanism can be locked so that the samples can manually be injected with a syringe.

The measuring cell of the DA-130N is located in a big window. Bubbles and residues inside the cell can easily be seen and avoided.

DA-130 sampling
The sampling speed can be controlled very accurately
The measuring cell can be emptied very quickly
A big window provides an excellent visibility of the measuring cell

10 temperature compensation coefficients provide enhanced accuracy of measurement

The density of a sample depends on temperature. The DA-130N determines the temperature during measurement and corrects the result to a standard temperature of 20°C or any other temperature the user defines. The temperature compensation coefficient ⍺ used for this correction depends on the nature of the sample being measured. The DA-130N can store up to 10 such compensation coefficients and the user can easily switch between these coefficients prior to measurement.

DA-130 temperature compensation
The ⍺ key allows to select the appropriate temperature compensation coefficient
The DA-130N can store up to 10 different temperature compensation coefficients

Easy data transmission

The DA-130N can store up to 1100 results in its internal memory. The results include the measured value, the temperature, the unit of the result, the date and time of measurement and the sample identification. One, several or all results can easily be transmitted to a printer or to a personal computer at any time. For this purpose, an IrDA interface is required. This interface as well as a stand for the instrument are available as an options.

DA-130 data transmission
Data transmission to IDP-100 printer with external IrDA interface (option)
Data transmission to personal computer with external IrDA interface (option)
Data transmission to laptop computer with built-in IrDA interface

Applications

Food and Beverage

  • Fruit juices (Brix)
  • Syrup
  • Beer (Plato)
  • Wine
  • Edible oils
  • Vinegar
  • Salad dressings
  • Milk
  • Cream
  • Soy milk
  • Lactic acid drinks
  • Soy sauce
  • Bouillon
  • Brine

Petroleum and Chemicals

  • Crude oil
  • Light oil
  • Kerosene
  • Gasoline
  • Organic solvents
  • Quenching oils
  • Cutting oils
  • Lubricants
  • Water sol. lubricants
  • Insulating oils
  • Hydraulic oils
  • Metal working oils
  • Rust preventive oils
  • Water sol. quenching oils
  • Antifreeze
  • Ethylene glycol
  • Propylene glycol

Pharmaceuticals, Flavours & Fragrances, Cosmetics

  • Injection solutions
  • Chinese herbal remedy
  • Eyedrops
  • Shampoos
  • Glycerol
  • Hair conditioners
  • Detergents
  • Skin toner
  • Hair tonic
  • Serum
  • Disinfectants
  • Ethyl alcohol
  • Flavors
  • Fragrances
  • Essential oils

Electronics, Surface Treatment,  Power Generation, Transport

  • Plating baths
  • Paints
  • Battery acid

Technical Specifications

Measuring principle Oscillating u-tube  
Supported measuring units Density, Specific Gravity,
Ethanol Content (wt% and vol% at 15 and 20 °C), Proof (IP and US at 60 °F),
API degree or density at 15°C or 60 °F for product groups A (crude oil),
B (fuel and petroleum products) and D (lubricants)
Brix, Baumé (light, heavy), °Plato,
H2SO4 (wt%), user defined concentration
 
Measuring range

Density [g/cm³]
Specific Gravity
Ethanol Content (wt%, vol%) [%]
Proof (IP)
Proof (US)
Brix [%]
Baumé light [°]
Baumé heavy [°]
Plato [°]
H2SO4 (wt%) [%]

0.0000 … 2.0000
0.0000 … 2.0000
0.0 … 100.0
0.0 … 175.0
0.0 … 200.0
0.0 … 75.0
10 … 100
0 … 72
0.0 … 20.0
0.0 … 100.0
Limit of error Density [g/cm³]
Specific Gravity
Ethanol Content (wt%, vol%) [%]
Proof (IP)
Proof (US)
Brix [%]
Baumé light [°]
Baumé heavy [°]
Plato [°]
H2SO4 (wt%) [%]
±0.001
±0.001
±1.0
±1.75
±2.0
±0.3
±0.4
±0.1
±0.3
±1.0
Resolution Density [g/cm³] 0.0001
Temperature range (sample) 0 … 40 °C  
Temperature indication resolution 0.1 °C  
Display contents Measuring value, Temperature (°C or °F), sample number,
stability of measuring value, temperature compensation coefficient,
data storage, data output, data deletion, battery alarm
 
Data storage 1'100 measurement results  
Printer IDP-100 dot matrix included
Temperature compensation API | Brix | Ethanol, Proof | Plato | H2SO4
Density | Spec. Gravity | Baumé | Conc.
automatic
10 user defined constants
Interface IrDA (V1.2)
Data output to printer or computer
 IrDA - RS converter required (option)
Ambient conditions Temperature
Humidity
5 … 35 °C
85% RH max. (no condensation)
Power supply Batteries
Lifespan of batteries
2*AAA (alkaline)
approx. 90 hours
Weight approx. 360 g  

Accessories

Printer

IDP-100 Printer
IDP-100 Printer

IDP-100 Printer

Dot matrix ink printer for GLP compliance.

  • Dot matrix printer with ink ribbon, prints on regular paper (width 57.5 ± 0.5mm).
  • 24 digits, 144 dots per line.
  • Automatic paper end detection - no loss of data!
  • 2 kB internal buffer memory. Advantage: Less time required per measurement, as the instrument does not have to wait until the results are printed out.
irDA - serial adapter
IrDA - serial adapter

IrDA - Serial adapter

Adapter required to transmit data from an RA-130 Refractometer or a DA-130N Density Meter to a personal computer or a printer; ordering number 69-00733.

  • In order to connect this IrDA adapter to an IDP-100 printer, a 9 to 25 pin serial adapter (ordering number 64-01127-01) is required.
  • Some laptop computers are already equipped with an IrDA interface. In such cases no IrDA adapter is required.
Serial adapter
9 to 25 pin serial adapter

Serial adapter

9 to 25 pin serial adapter; ordering number  64-01127-01. Required to connect an IrDA adapter to an IDP-100 printer.

Stand and Syringe Adapter

DA-130 stand
The stand – a valuable option to convert the DA-130N in a bench top unit

Stand

The DA-130N offers many features you would only expect from an expensive bench top density meter – and it often makes perfect sense to use it in the laboratory instead of a bench top unit. With the optional stand the DA-130N has its assigned space on the bench and can permanently be connected to a printer or a personal computer via the optional IrDA interface. All it then takes to convert the DA-130N to a bench top unit is switching its operating mode from 'Field' to 'Labo': Instead of storing the results in its internal memory, the instrument then automatically transmits them to the printer or personal computer after each single measurement.

DA-130 syringe adapter
Syringe adaptor for DA-130N density meter

Syringe adapter

The sampling pump of the DA-130N density meter fills the measuring cell by suction. It allows to pump samples with a viscosity of up to 2000 mPa·s. It is possible to measure higher viscous products with the DA-130N: For this purpose the sampling pump can be locked and the instrument can be fitted with a syringe in order to inject the samples.

Certified Standard Reference Material

Density determination by hydrostatic weighing
Density determination by hydrostatic weighing

Liquid Density Standards

 

jcsslogo.png

 

KEM does not only have several decades of experience in producing digital density meter it also has a JCSS (Japan Calibration Service System) Accredited Calibration Laboratory (assessed on JIS Q 17025:2000 (ISO/IEC 17025:1999) where a wide range of certified liquid density standard reference material is produced. KEM has the JCSS accreditation number 0115.

The density of these standards is determined with by hydrostatic weighing using a mono-cristal silicon body (see picture) and is thus directly traceable to recognized national standards. All standards come with a certificate bearing the JCSS symbol which assures their traceability to National Measurement Standards of Japan which are recognized worldwide through the ILAC and APLAC MRA.

Although calibration with air and water is common practice, regular system performance checks using reference standards has benefits with regard to GLP compliance and traceability of the results to recognized national standards.

Density standard reference material
Certified Density Standard Reference Material

Density meters are often used to determine the ethanol content. For this reason, KEM offers a range of certified ethanol / water density standards. The ethanol standards come in three vials of 20 mL each.

Due to their measuring principle, the reading of digital density meters based on an oscillating U-tube is influenced by the viscosity of the measured sample because the oscillation of the U-tube is dampened due to the shear forces that occur in viscous samples. Modern digital density meter can automatically correct for this so called viscosity error. If frequently samples are measured having a viscosity which necessitate a correction of the viscosity error, regular system performance checks using certified density reference material having approximately the same viscosity as the samples should be performed. This is the only way to ensure the viscosity correction of the density meter is working correctly. For this reason KEM is offering certified density standard reference material having different viscosities.

 

StandardDensity (g/cm³ at 20°C)Limit of error (g/cm³)Ordering number
Water 1) 0.99821  ±0.00003  12-02708-02
Iso-octane 2) 0.691.. ±0.00003  12-03288-02
Dichlorotoluene 2) 1.249.. ±0.00003 12-03289-02
Bromobenzene 2) 1.494.. ±0.00003 12-03290-02
1) two vials of 10 mL 2) two vials of 10 mL (organic solvent | water)
StandardDensity (g/cm³ at 20°C)Limit of error (g/cm³)Ordering number
5% ethanol sol.1) 0.991.. ±0.00003 12-03536
10% ethanol sol.1) 0.985.. ±0.00003 12-03536-01
15% ethanol sol.1) 0.980.. ±0.00003 12-03289-02
20% ethanol sol.1) 0.975.. ±0.00003 12-03536-03
25% ethanol sol.1) 0.970.. ±0.00003 12-03536-04
30% ethanol sol.1) 0.964.. ±0.00003 12-03536-05
35% ethanol sol.1) 0.958.. ±0.00003 12-03536-05
40% ethanol sol.1) 0.948.. ±0.00003 12-03536-07
1) three vials of 20 mL
StandardDensity (g/cm³ at 20°C)Limit of error (g/cm³)Ordering number
Visco Liquid 5 (JCSS Certif.)1) 0.882.. ±0.00003 12-03528
Visco Liquid 20 (JCSS Certif.)1) 0.839.. ±0.00003 12-03528-01
Visco Liquid 50 (JCSS Certif.)1) 0.848.. ±0.00003 12-03528-02
Visco Liquid 100 (JCSS Certif.)1) 0.855.. ±0.00003 12-03528-03
Visco Liquid 200 (JCSS Certif.)1) 0.861.. ±0.00003 12-03528-04
Visco Liquid 500 (JCSS Certif.)1) 0.871.. ±0.00003 12-03528-05
Visco Liquid 2000 (JCSS Certif.)1) 0.879.. ±0.00003 12-03528-06
1) includes two vials of 10 mL, density standard mentioned in the table + density standard water
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