Technical Articles

By Laurent Courthaudon (Founder, AlyTech) and Klaudia Lulkowska, AlyTech Short answer For a laboratory checking H2S, NH3 and CO in hydrogen fuel to ISO 14687, preparing the calibration points by dynamic dilution costs about 2,990 € per year, against about 8,990 € per year with ready-made low-level cylinders: about two thirds less, diluter included, with

Siloxane Calibration Gas for Biogas: Generate D4 Standards On Site from the Liquid A siloxane calibration gas is difficult to buy. Cylinders are expensive, slow to arrive, available in few concentrations, and they do not keep long. A joint study between Axel’One (chemistry and environment platform, Lyon) and AlyTech shows another route: vaporize liquid siloxane

P2 Compliance · Gas calibrationThe most common gas calibration compliance mistake is relying only on the MFC calibration certificate and the ISO 6145-7 two-year verification, with no checks in between. Auditors want evidence that the calibration gas was accurate on the day it was used. To stay audit-ready, labs should monitor their gas dilutor regularly,

Short answer: an exact calibration gas concentration is never a single spec on a datasheet — it’s the result of a verified chain: each Mass Flow Controller (MFC) is individually flow-calibrated against a NIST-certified reference, the diluter’s output is checked analytically against a validated analyzer, and the result is cross-checked against a certified cylinder at

How to Choose the Right Gas Mixer for Your Laboratory: 7 Specs That Actually Matter The right gas mixer is the one whose specifications match how your lab actually works. Seven specs decide it: the dilution ratio you need, how many gases you blend at once, your required concentration accuracy, the traceability and uncertainty you

Do You Really Need a Gas Mixer? When One Cylinder Isn’t Enough By Laurent & Klaudia, AlyTech The short answer You need a gas mixer or gas diluter when a single certified cylinder cannot cover your whole analytical range — and a dynamic dilution system lets you keep one concentrated certified cylinder and generate every

In short: EPA Method TO-17 measures VOCs collected by active sampling on sorbent tubes and analysed by thermal desorption (TD) GC–MS. Reliable quantification depends on calibration standards loaded onto the tube in the gas phase, the same physical state as the field sample. GasMix and LiqMix dynamic dilution systems generate these matrix-matched, multipoint standards on

NEPHOS by LiqMix: BTEX & VOC Gas Standards Generated from a Single Liquid NEPHOS is a liquid-to-gas standard generator that produces traceable BTEX and VOC calibration standards on demand from one liquid reference, replacing a shelf of certified cylinders. It vaporises a liquid standard into a controlled gas stream, reaches concentrations from percent down to

NEW PRODUCT  ·  MAY 2026 Alytech Launches ZEPHYR II: The Next Generation Smart Gas Diluter from GasMix™ Alytech is proud to announce the launch of ZEPHYR II, the next generation of the GasMix™ smart gas diluter with two channels. ZEPHYR II is the first ZEPHYR to run AlySoft, the unified software platform behind every GasMix™

How Modern Gas Mixers Achieve Reliable, Defensible Accuracy A gas mixture is only as good as your ability to prove it. Modern mass flow controllers are excellent, but hardware alone does not make a result defensible. What does is the system around it: bidirectional MFC control that reads back actual delivered flow in real time,

Mass Flow Controllers vs. Sonic Nozzles: Which Technology for Gas Dilution? By the GasMix team, AlyTech · Updated September 2026 The short answer A sonic nozzle sets flow with a fixed orifice under choked flow, so it delivers fixed flow steps and needs an upstream pressure at least twice the downstream pressure. A mass flow

NIST Traceable Calibration: What It Means and What the Certificate Must Show By Florian, Augustin, Laurent & Klaudia, AlyTech · Updated November 2026 The short answer NIST traceable means that a measurement result is linked to a national primary standard through a documented, unbroken chain of calibrations, each with its stated uncertainty. A NIST traceable