Fast, reliable, and portable precision fuel analysis you can take anywhere to be showcased at Gulf Coast Conference

For over 30 years, Zeltex has led the field in portable fuel analysis with instruments that deliver laboratory-grade accuracy in a rugged, field-ready package. Today, that legacy continues with the ZX-101SQ and the ZX-101RZ+—two powerful tools engineered to meet the real-world demands of fuel inspection professionals around the globe.

The ZX-101SQ builds upon the trusted platform of the ZX-101XL, integrating upgraded Near-Infrared (NIR) optics and a more intuitive user interface designed for fast, accurate readings—even in dynamic field conditions. With expanded wavelength coverage from 810 to 1045 nm, the SQ enhances accuracy in ethanol and biodiesel analysis and supports over a dozen fuel calibrations out of the box.

Capable of analysing octane, cetane, percent ethanol, and biodiesel content in under a minute, the ZX-101SQ empowers users to verify fuel quality on the spot—at terminals, refineries, retail stations, and in the field. An automatic fuel-type detection feature reduces the risk of operator error, while expanded onboard memory (up to 100 sample results) ensures longer sessions without interruption.

Housed in a military-grade Pelican case and powered by 6 AA batteries or a vehicle adapter, the ZX-101SQ is ready to go wherever the job takes you—no lab, no problem.

For users operating in harsher environments—from desert climates to remote inspection sites—the ZX-101RZ+ offers all the analytical power of the SQ with even more robust hardware.

Designed for maximum durability, the ZX-101RZ+ is built into a ruggedised casing, sealed controls, and a field-proven optical system with no moving parts and no light sources to replace—minimising maintenance and extending lifespan. Like the SQ, it offers rapid analysis of multiple fuel parameters with reliable accuracy and the same user-friendly interface.

Whether deployed in extreme heat, high humidity, or dusty conditions, the RZ+ stands up to the elements while delivering results in under 60 seconds.

With the rising cost of lab analysis and growing demand for real-time fuel verification, the ZX-101 line offers a cost-effective alternative without compromising on performance. These instruments are especially valuable for state inspection agencies, refineries, fuel distributors, and fleet managers who need quick, dependable results with minimal training and setup.

Whether you’re verifying fuel deliveries, conducting regulatory checks, or ensuring product quality in the field, Zeltex gives you the confidence to act on your data immediately.

Both the SQ and RZ+ come backed by Zeltex’s U.S.-based service and support, a one-year warranty, and decades of trusted performance in the industry. Thousands of units are already in use worldwide—and growing.

Stop by Booth #426 at the Gulf Coast Conference to see these portable analysers in action and speak with the experts about how Zeltex can help meet your fuel testing needs.