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Fuel | Octane Analyzers

Fuel | Octane Analyzers

Fuel | Octane Analyzers

ZX-101SQ - Portable Fuel Octane Analyzer

Decades of expertise in portable octane, cetane and bio-fuel with lab-accurate analysis.

45 State Agencies have used Zeltex portable fuel octane analyzers over the years, making the ZX-101 series the gold standard in portable fuel testing. The main way that fuel is analyzed is through a CFR engine, which takes time, costs a lot of money, and destroys the sample.

Our portable fuel octane analyzers are quick, preserve the sample, and the results are very close to the CFR engines. Now the ZX-101SQ makes it even easier and more reliable to analyze fuel samples
where you need it most, when you need it most


Features & Specifications

Standard Calibrations Gasoline - RON, MON, (R+M)/2
Ethanol Blended Gasoline - RON, MON, (R+M)/2, Ethanol %
Optional Calibrations Diesel - Cetane Index, Number
Biodiesel - Biodiesel %
Output Full color display, built in printer
Data Transfer USB
Measurement Time Under 1 minute
Number of Calibrations Up to 10
Data Storage 100 Samples
Dimensions 4.7" x 13.5" x 2.2" (12cm x 33cm x 5cm)
Weight 3 ,bs. (less than 2 kg)
Power AC or 6 AA batteries
Power consumption 750 ma


Measurement Mode

Diffuse Transmittance

Spectral Range

16 filters covering 810 to 1045 nm

Optical Range

0 to 6 AU


0.00001 AU


0.05 Mili-AU


Solid-State. No lightbulbs or movable parts

Sample Information

Sample Size

200mL with 75mm pathlength

Sample Holder

Reusable glass with chemical seal cover

Sample Preparation

None required

Sample destruction/loss




CFR Engine or other fuel lab standards

Octane Equivalent

ASTM D2699, ASTM D2700

Diesel equivalent

ASTM D613, ASTM D976

Research Octane Number Accuracy


Motor Octane Number Accuracy


Octane Accuracy


Ethanol Percentage Accuracy

Less than ±1.0

Cetane Number Accuracy


Cetane Index Accuracy


Optional Accessories

One Year Extended Warranty

Cigarette Lighter Adapter

Additional AC Adapter

Additional USB Cable

Additional Printer Paper (10 Rolls)

Additional Sample Holder, Single

Additional Sample Holders, Box of 12

Additional Lids for Sample Holders (12)

Additional Labels for Sample Holders (12)

Aluminum Sample Carrying Case with 12 Additional Sample Holders

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