Eagle Eye Power Solutions

SG-Ultra Max Plus Ex Petrol Digital Hydrometer, Density Meter

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The SG-Ultra Max Plus Ex Petrol Digital Hydrometer, Density Meter is designed for petroleum testing applications. This portable tester is commonly used in refineries, fuel terminals, offshore and transportation applications. This electronic battery hydrometer is intrinsically safe in hazardous testing environments. All wetted parts and the special housing are resistant to petroleum samples and similar solvents. The leak-proof sealed housing is safe against humidity and spills and makes the unit suitable for harsh industrial and field conditions. The SG-Ultra Max Plus Ex Petrol Digital Hydrometer, Density Meter is an officially accepted field method for the new ASTM Standard “D7777-12” which describes the “Test Method for Density, Relative Density, or API Gravity of Liquid Petroleum by Portable Digital Density Meter” with a minimum accuracy requirement of 0.001g/cm3.


  • Accuracy: 99.999% accurate, tests density and temperature simultaneously
  • User-Friendly: Compact, lightweight, and allows for one-hand measurement, automatic temperature compensation
  • Robust & Rugged: Comes with protective carrying case. Measuring cell can be exchanged and replaced if necessary
  • Bluetooth Communication: Data exchange with a PC and data export to a printer
  • Storage: up to 1,024 total measurement results including time stamp and sample ID
  • Temperature: Automatic temperature compensation

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Measurement Range:Density: 0.000 – 3.000 g/cm3
Sample Temperature: 01 – 40 °C (321 – 104 °F)
Viscosity: 0 – 1,000 mPa
Accuracy:Density: 0.001 g/cm3
Temperature: ±0.2 °C (±0.4 °F)
Resolution:0.0001 g/cm3
Repeatability:0.0005 g/cm3
Minimum Sample Volume:2 mL
Communication:Bluetooth, RFID
Display:Backlit color with capacitive touch controls
Internal Storage:1024 Results
Operating Environment:-10 – 40 °C (14 – 104 °F)
Intrinsic Safety:EX II 2 G Ex ib IIB T4
Power Requirements:(3) 1.5 V LR06 AA Alkaline Batteries
Dimensions:245 x 103 x126 mm (9.6 x 4 x 5 in)
Weight:660 g (23.3 oz)

(1) Sample must not freeze in the measuring cell



Support Documents

Technical Information


What is the measurement range of the SG-Ultra Max Plus Digital Hydrometer / Density Meter?
The density range is 0.000-3.000 g/cm3

Does the SG-Ultra Max Plus work with my solution?
The SG-Ultra Max Plus works with a vast range of solutions across many unique industries. The best method to verify if the unit will work with your solution is to compare the Ultra Max wetted parts list with a chemical compatibility chart of your solution (parts list found below):

SG Ultra Max Wetted Parts List:

  • Borosilicate glass Measuring cell, pump cylinder
  • PP (Polypropylene) Faradex MS002 Housing
  • PVDF (Polyvinylidene fluoride) Connection block, bolt
  • Viton O-ring

How accurate is the SG-Ultra Max Plus?
The SG-Ultra Max Plus is accurate to 0.001g/cm3 with repeatability of 0.0005

How does the SG-Ultra Max Plus communicate?
The Ultra Max utilizes Bluetooth and RFID.

What is the measurement range of the SG-Ultra Max Plus?
The density range is 0.000-3.000 g/cm3

How long does the SG-Ultra Max Plus take to display measurement results?
Measurement times vary depending on unit and sample temperature. The sample will have to equilibrate inside the measuring cell. This process generally takes only a few seconds but in some situations may take up to a minute

How many measurements does they SG-Ultra Max Plus Density Meter store?
The maximum stored results are 1,024

What file format is the data imported to the PC as?
Data is exported from the SG-Ultra Max Plus as either a CSV or TXT file. This can be viewed using Microsoft Excel or Exmons Ultra Plus software

What is the maintenance for the SG-Ultra Max Plus digital hydrometer?
Precise measurements demand a well-functioning precision tool. The device should be cleaned after each use. The consumable parts of the Ultra Max should be monitored closely and replaced regularly as needed

How often should I calibrate my SG-Ultra Max Plus digital hydrometer?
It is recommended to have the unit calibrated annually

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