Five Gases, One Panel, Sub-PPB Purity.
An analytical instrument doesn’t care how pure your gas supply is on average — it cares whether the molecule it’s measuring right now is real signal or contamination riding in on the carrier gas. Neometrix’s Gas Distribution System is a fully engineered assembly that delivers Zero Air, N2, H2, He, and CH4 from high-pressure cylinders to laboratory panels through automatic dual-cylinder changeover manifolds, multi-stage purification, and point-of-use SS 316L regulation — with an ATEX/CE-certified gas detection system watching every line for leaks.
Changeover That Never Interrupts the Run
A pilot-operated valve senses when the primary cylinder bank’s pressure falls to a preset point and triggers an uninterrupted switch to the reserve bank, with zero manual intervention. For an analytical run that might take hours, a cylinder running dry mid-sequence isn’t just an inconvenience — it’s lost data. Five dual-cylinder changeover banks cover the ZA, N2, H2, He, and CH4 lines, plus a spare purification module.
Purification in Three Sequential Stages
Each gas stream runs through cartridge-type traps in SS 304 panels: a desiccant stage brings moisture below 5 ppb, a carbon bed strips hydrocarbons below 15 ppb, and an oxygen scavenger holds residual O2 below 1 ppb. Quick-release clamps let elements swap out fast during scheduled maintenance rather than becoming an unplanned downtime event.
Regulation Right at the Instrument, Not Upstream
Compact SS 316L point-of-use regulators sit at each instrument inlet, maintaining stable 0–100 psi through a diaphragm-sensed design with integrated 10 µm mesh filters. Regulating pressure centrally and routing it through long runs of tubing invites pressure fluctuation and particulate pickup along the way; regulating right at the point of use removes that variable entirely.
A Detection System That Watches Every Line
A 16-channel ATEX/CE/IECEx-certified panel aggregates 4–20 mA analog and Modbus RTU digital signals from SS 316 sensor heads rated for Gas Groups IIA/IIB, with programmable alarms and relay outputs for automated shutdown — because a gas distribution system handling hydrogen and other combustibles needs its safety monitoring built in, not bolted on afterward.
Frequently Asked Questions
Why does a lab gas distribution system need automatic cylinder changeover instead of just using larger cylinders?
Because the risk isn’t running out of gas eventually — it’s running out of gas in the middle of an analytical sequence, which can invalidate hours of instrument time and require the entire run to be repeated. Larger cylinders push the problem further out but don’t eliminate it, and someone still has to notice a bank is running low and manually switch over, which introduces both a monitoring burden and a window where a missed changeover interrupts a run. An automatic dual-cylinder changeover manifold solves this differently: a pilot-operated valve continuously senses when the primary bank’s pressure falls to a preset threshold and switches to the reserve bank without any manual intervention or interruption in supply, regardless of cylinder size. That’s what actually protects a long GC-MS sequence or a multi-day process simulation from being cut short by a depleted cylinder.
Why does gas for laboratory instruments need to be purified down to single-digit parts-per-billion levels?
Because trace contamination in a carrier or reference gas doesn’t stay separate from the measurement — it becomes part of the signal an instrument reports, and at the sensitivity level modern analytical instruments operate at, even very small levels of moisture, hydrocarbons, or oxygen can distort results. In gas chromatography and mass spectrometry work specifically, moisture and hydrocarbon contamination in carrier gas causes baseline drift and reduces detector sensitivity, while residual oxygen can degrade sensitive columns or interfere with reactions in catalyst research. Sequential purification — a desiccant stage for moisture, a carbon bed for hydrocarbons, and an oxygen scavenger stage — brings each of these down to the sub-15-ppb or sub-ppb range specifically because that’s the level at which the gas itself stops being a variable in the measurement, letting the instrument’s result reflect the sample rather than the gas supply.
Get In Touch
For full specifications, RFQs, or a technical discussion about the Gas Distribution System:
– Product page: Gas Distribution System
– Email: [email protected]
– Phone: +91-7777-876-876
