NMX‑ETS‑100 / Rev 00 / PEM / AEM / alkaline / I‑V · EIS · crossover 2026 · Product Page

NMX-ETS-100 · ENGINEERED TO ORDER — ELECTROLYSER TEST STATIONS

Prove the electrolyser, cell by cell.

Name: Electrolyser Test Station
Brand: Neometrix

A turnkey electrolyser test station that grades a stack the only honest way — controlled inputs in, precise measurement out. Programmable DC, DI water, thermal and back-pressure in; polarisation, efficiency, H₂/O₂ crossover, per-cell voltage, EIS and durability out. PEM, AEM or alkaline, single-cell to full-stack, with hydrogen safety throughout. Engineered to order — no specific delivered station is claimed on this page.

Enquire — electrolyser test Capability sheet (PDF)

Illustrative image, not a delivered installation — an electrolyser test station in a clean laboratory: a steel-framed test rack carrying a programmable DC power cabinet, a panel of gas mass-flow controllers and analysers, a deionised-water and thermal skid, and an electrolyser stack mounted centrally with fluid and electrical connections, all wired to a control console

Fig · 01 Controlled inputs, measured outputs — the bench that grades a stack — illustrative, not a delivered installation

Power

DCprogrammable

Curve

I‑V+ EIS

Crossover

H₂/O₂monitored

Cells

per-cellvoltage

Types

PEMAEM / alkaline

ISO 9001 / 14001 Engineered to order H₂/O₂ hazardous-area safety Automated protocols & logging Noida · India

Overview

Measure the stack before you trust the plant.

An electrolyser’s efficiency, purity, durability and response to a swinging renewable supply are the numbers a whole hydrogen plant is designed around. You do not take them on a datasheet — you measure them, under controlled and repeatable conditions, on a test station, before the stack is trusted with a project.

Illustrative image, not a delivered installation — an electrolyser stack under test on a bench: a clamped rectangular column of many thin cells held between two end plates on tie-rods, with water and gas ports connected by tubing and a fan of fine voltage-sense wires led out to a monitoring block, no text and no people

Fig · 02 A stack under test — per-cell voltage leads on a column of cells — illustrative, not a delivered installation

A fair test needs controlled inputs. To grade a stack you must give it clean, precise DC power, DI water at a set temperature and flow, and controlled back-pressure — the station is a precision inputs-provider as much as a measurement rig, because a sloppy input makes an honest number impossible.

Crossover is the safety-critical measurement. Hydrogen crossing into the oxygen stream toward the flammable limit is both a performance metric and a hazard — so continuous crossover monitoring with LFL trips is core, not an add-on.

Per-cell voltage finds the weak cell. A stack is cells in series; one degrading cell drags — and can run away with — the whole stack. Per-cell monitoring is the diagnostic a power supply and a flowmeter cannot give you.

Anyone can run current through a stack and watch it make gas. A test station tells you how well it makes gas, how pure, how long — and which cell is about to let you down.

The Companion to the Plant

Prove the stack, then build around it

The station measures exactly the numbers a green hydrogen generation plant is designed from — efficiency, purity, dynamic response. Test the stack here; engineer the plant on real data, not a brochure. The two are one workflow.

Power, Gas & Electrochemistry

Three disciplines in one rig

A programmable DC source, a safe H₂/O₂ gas system and an electrochemical workstation — test-bench, gas-handling and controls competence Neometrix already has, combined with a bought-in potentiostat/EIS instrument.

Honest on Sourcing

We integrate; the instruments are specialist

The DC supply, mass-flow controllers, gas analysers and the electrochemical workstation are bought-in; Neometrix engineers the station — fluidics, thermal, gas, test fixturing, safety, controls and protocols. No delivered station is claimed on this page.

Architecture

Controlled in, measured out.

The schematic shows the controlled inputs the station feeds the stack and the outputs it measures to grade it — and the detail panel explains what each measurement actually tells you.

FIG · 03TEST-STATION ARCHITECTURE · CONTROLLED INPUTS · STACK UNDER TEST · MEASURED OUTPUTS · SAFETY

Fig · 03 A fair, repeatable test: controlled DC, water, thermal and pressure in; polarisation, crossover, per-cell voltage and durability out

Arc · 01

Controlled Inputs

A programmable DC supply that holds steady or ramps to simulate a renewable-fed rectifier, DI water at controlled flow, temperature and conductivity, stack temperature control, and back-pressure / differential H₂-O₂ pressure control — the fair, repeatable conditions a valid test demands.

Arc · 02

Performance Measurement

The polarisation (I-V) curve and the specific energy / efficiency in kWh/kg, hydrogen and oxygen mass-flow, and electrochemical impedance (EIS) — the numbers that say how well, and how efficiently, the stack makes hydrogen.

Arc · 03

Crossover & Per-Cell

Gas crossover (H₂-in-O₂ and O₂-in-H₂) as both purity and safety limit, and per-cell voltage across the series stack to catch the weak or degrading cell — the two diagnostics that separate a real test station from a power supply and a flowmeter.

Arc · 04

Safety & Control

Hazardous-area design, gas & LFL detection, N₂ purge, vent, over-temp/pressure and emergency shutdown — because crossover toward the flammable limit is a real bench hazard — with a PLC and electrochemical workstation running automated protocols and logging every test.

Have an electrolyser test, stack QC or hydrogen R&D-bench requirement? Send the stack type, power and the test protocol — a clause-by-clause compliance matrix within two working days · [email protected]

Send tender spec

Specifications

Reference station, sized to your stack.

The parameters below describe a reference electrolyser test station. Power, water, thermal and gas capacities, the analyser suite and the fixturing follow from the stack chemistry, size and the test protocol — single-cell research to full-stack production QC.

Illustrative image, not a delivered installation — the control and measurement side of an electrolyser test station: a grey instrument cabinet holding a programmable DC power unit, a rack of gas-analyser modules and a benchtop electrochemical workstation, with two monitors on a desk showing plain dark screens, in a clean lab

Fig · 04 Programmable power, gas analysers and the electrochemical workstation — where the stack is graded — illustrative, not a delivered installation

Where stack testing goes wrong

In the inputs and the safety, not the meter. A DC supply too coarse to hold a clean setpoint blurs the polarisation curve; water that drifts in temperature moves the efficiency number the customer is buying; a crossover analyser treated as optional turns a routine durability run into an oxy-hydrogen hazard; a per-cell system skipped hides the one failing cell until it takes the stack.

That is why the inputs are controlled and logged, the crossover is continuously monitored and interlocked, and every cell is watched — and why the station is built as a hydrogen-safe, hazardous-area installation first. A test station is only worth the confidence you can place in its numbers.

Full specification — expand

Station	Electrolyser test station — turnkey: integration of power, fluidics, thermal, gas and analyser systems, cell/stack test fixturing, H₂/O₂ safety, controls and protocols, installation, commissioning and training
Duty	Characterisation of an electrolyser cell, short-stack or full stack — PEM, AEM or alkaline — for R&D, qualification and production QC
Controlled Inputs	Programmable DC supply (steady + ramped, simulates the rectifier) · DI water at controlled flow, temperature & conductivity · stack temperature control · back-pressure & differential H₂/O₂ pressure
Performance	Polarisation (I-V) curve · specific energy / efficiency (kWh/kg or kWh/Nm³) · H₂ and O₂ mass-flow · Faradaic efficiency
Crossover & Cells	Gas crossover H₂-in-O₂ and O₂-in-H₂ (purity + safety) · per-cell voltage monitoring across the series stack
Electrochemistry	Electrochemical impedance spectroscopy (EIS) via a potentiostat · durability / degradation over cycles and hours · automated protocols
Safety	Hazardous-area design · gas & LFL detection, N₂ purge, vent · over-temperature / over-pressure protection · emergency shutdown — crossover interlocked
Control & Data	PLC + electrochemical workstation · automated test sequences · data logging, trending and reporting per test
Scale	Single-cell / short-stack research bench (kW) to full-stack production tester (tens–hundreds kW)
Sourcing	Programmable DC supply, mass-flow controllers, gas analysers and the electrochemical workstation are bought-in specialist instruments; Neometrix engineers and integrates the station around them
Status	Engineered to order · turnkey · quoted across electrolyser test-station requirements · no specific delivered station is claimed on this page

PDF · 1 page

Electrolyser Test Station — Capability Sheet

Tender Response

Send your stack & test protocol — compliance matrix in two working days

Variants

One discipline, four benches.

Tenders call it an electrolyser test station, a stack test bench, an electrochemical test station or an end-of-line stack tester. The discipline — controlled inputs, honest measurement, safe gas — is common to all.

Var · 01

Full-Stack Test Station

The reference bench — programmable power, water, thermal, gas and safety with per-cell voltage and crossover, sized to a full PEM, AEM or alkaline stack for qualification and QC.

Var · 02

Single-Cell & Short-Stack R&D Bench

A smaller, higher-resolution bench for materials and cell research — membranes, electrodes and catalysts — with an electrochemical workstation and fine input control at kilowatt scale.

Var · 03

Production / End-of-Line QC Tester

A hardened, faster tester for the factory floor — automated protocols, pass/fail limits, per-cell screening and traceable logging — to grade every stack before it ships.

Var · 04

Crossover, Safety & Diagnostics Package

The gas-safety and diagnostics back end — crossover analysers, LFL detection, per-cell monitoring and interlocks — to upgrade an existing bench to a hydrogen-safe, cell-resolved standard.

Applications

Where it applies.

Wherever an electrolyser has to be measured before it is trusted — in the lab, on the line, or before a plant.

A · 01Electrolyser makers — production & end-of-line stack QC

A · 02Research institutes & universities — PEM / AEM / alkaline R&D

A · 03Refiners & energy majors — stack acceptance before a plant

A · 04Membrane & electrode research — single-cell characterisation

A · 05Durability & lifetime testing — degradation over thousands of hours

A · 06Green-H₂ project teams — verify the assumptions the plant is built on

FAQ

Common questions.

Plain-language answers from the engineering team.

Q · 01 Why test an electrolyser at all — doesn’t the maker give a datasheet?

A datasheet is a starting point, not a guarantee for your duty. An electrolyser’s real efficiency, purity, dynamic response and durability depend on how it is operated — the temperature, the pressure, the water, and above all whether it runs on steady power or the ramping supply of a real solar or wind site. A whole green hydrogen plant is designed around those numbers, so you verify them under your conditions before you commit, not after. For a maker, a test station is how you prove every stack you ship and defend your own datasheet; for a research team, it is how you compare membranes and catalysts on equal terms; for a buyer, it is how you accept a stack against a spec. In every case the point is the same: measure it under controlled, repeatable conditions rather than trust a number generated on someone else’s bench, on someone else’s day.

Q · 02 Why does gas crossover matter so much?

Because it is a performance number and a safety number at the same time. In an electrolyser a little hydrogen permeates into the oxygen stream and a little oxygen into the hydrogen; how much tells you about the membrane’s health and the stack’s efficiency — but if hydrogen in oxygen climbs toward the flammable limit, you have a genuine explosion hazard sitting on the bench, and it rises exactly when the stack is run hard or at low load, which is when you most want to test. So the station measures crossover continuously with dedicated analysers, and it is interlocked: cross a set fraction of the lower flammable limit and the test trips safe. Treating crossover as an optional readout rather than a live safety input is one of the most dangerous shortcuts in stack testing, which is why we build it in as core, with the hazardous-area design and shutdown logic around it.

Q · 03 What does per-cell voltage monitoring buy you?

The ability to see inside the stack rather than just at its terminals. A stack is many cells in series, so the overall voltage is an average that can look perfectly healthy while one cell is quietly failing — drying out, developing a short or losing catalyst. That weak cell runs hotter, degrades faster and can eventually reverse or run away, damaging its neighbours and, in the worst case, driving local crossover. Monitoring every cell’s voltage individually exposes the outlier early: you see one cell trending away from the pack long before the stack-level number moves. For production QC it is a pass/fail screen that catches a bad build; for durability testing it is how you attribute degradation to a specific cell; for safety it is an early warning. It is precisely the measurement a plain power-supply-and-flowmeter rig cannot give, and it is a defining feature of a real test station.

Q · 04 PEM, AEM, alkaline — can one station test all of them?

A well-engineered station covers the range, configured for the chemistry. The three differ in how they carry charge and what they demand of the rig: alkaline stacks circulate a caustic potassium-hydroxide electrolyte and need materials and handling suited to it; PEM stacks run on pure water and an acidic membrane at higher pressure and current density; AEM is the newer anion-exchange approach that sits between them. What changes on the station is the fluid path and materials (electrolyte circulation and compatibility versus pure-water feed), the pressure and thermal ranges, and the safety envelope. The core stays the same — programmable DC, controlled water and thermal, gas flow and crossover, per-cell voltage, EIS and the safety system. So we engineer the station around the chemistries you actually test: a dedicated bench where you work in one, or a configurable one where you compare across all three, rather than pretending one fixed rig fits every stack.

Q · 05 How is this different from your hydrogen component test facility, P2P system and generation plant?

Different jobs on different objects. Our hydrogen component test facility qualifies vehicle fuel-system parts — valves, cylinders, regulators — mechanically, with burst, leak, impulse and permeability tests to automotive standards; it proves plumbing, not an electrolyser. The power-to-power (P2P) system is a working round-trip energy unit — a small electrolyser, storage and a fuel cell — a product that stores energy, not a rig that measures a stack. The green hydrogen generation plant produces hydrogen at industrial scale. An electrolyser test station does none of those: it characterises the electrolyser stack itself, electrochemically, under controlled conditions — efficiency, crossover, per-cell health, impedance, durability. It is the R&D and QC bench that sits upstream of the plant, proving the stack the plant will be built around. They are complementary lines in one hydrogen story, and this page is the test station.

Q · 06 Do you build the whole station, or integrate instruments?

We engineer the station and integrate specialist instruments — and we are clear about the split. The programmable DC power supply, the mass-flow controllers, the gas-purity and crossover analysers and the electrochemical workstation (the potentiostat and impedance instrument) are proprietary items from established makers, chosen for the duty. What Neometrix designs and delivers is the station that turns those instruments into a safe, repeatable test rig: the fluidic system (DI water, thermal, back-pressure), the gas handling and hydrogen safety with hazardous-area design, the cell and stack test fixturing, the controls, automated protocols and data, and the installation and commissioning. It draws on the same test-bench, gas-handling and safety competence behind our other hydrogen and test systems. To be plain about status: this capability is offered turnkey and quoted against electrolyser test-station requirements; no specific delivered station is claimed on this page.

↗

The hydrogen line from Neometrix.

The plant the tested stack feeds, and the hydrogen component test facilities alongside — engineered at our Noida facility.

↗ Production

Green Hydrogen Generation Plant

The plant built on the numbers this station proves — stack in a plant.

↗ Component Test

Hydrogen Component Test System

Burst, leak & impulse of H₂ components — mechanical, not electrochemical.

↗ Fuel-System Test

Hydrogen Fuel-System Component Test

Type-qualifies vehicle fuel components to ISO 12619 & R134.

Browse all Neometrix product lines.

Get a quotation

Send your stack
and test protocol.

The Projects desk replies within two working days with a clause-by-clause compliance matrix and a budgetary quotation. Write to [email protected] or use the form.

Enquire — electrolyser test Capability sheet (PDF) +91 7777 876 876

ISO 9001 / 14001 ENGINEERED TO ORDER — ELECTROLYSER TEST STATIONS PEM / AEM / ALKALINE · I-V · EIS · CROSSOVER · PER-CELL ENGINEERED IN NOIDA · INDIA

Prove the electrolyser, cell by cell.

Measure the stack before you trust the plant.

Prove the stack, then build around it

Three disciplines in one rig

We integrate; the instruments are specialist

Controlled in, measured out.

Controlled Inputs

Performance Measurement

Crossover & Per-Cell

Safety & Control

Reference station, sized to your stack.

Where stack testing goes wrong

One discipline, four benches.

Full-Stack Test Station

Single-Cell & Short-Stack R&D Bench

Production / End-of-Line QC Tester

Crossover, Safety & Diagnostics Package

Where it applies.

Common questions.

The hydrogen line from Neometrix.

Green Hydrogen Generation Plant

Hydrogen Component Test System

Hydrogen Fuel-System Component Test

Send your stack
and test protocol.

Similar Products

Share This Page

Prove the electrolyser, cell by cell.

Measure the stack before you trust the plant.

Prove the stack, then build around it

Three disciplines in one rig

We integrate; the instruments are specialist

Controlled in, measured out.

Controlled Inputs

Performance Measurement

Crossover & Per-Cell

Safety & Control

Reference station, sized to your stack.

Where stack testing goes wrong

One discipline, four benches.

Full-Stack Test Station

Single-Cell & Short-Stack R&D Bench

Production / End-of-Line QC Tester

Crossover, Safety & Diagnostics Package

Where it applies.

Common questions.

The hydrogen line from Neometrix.

Green Hydrogen Generation Plant

Hydrogen Component Test System

Hydrogen Fuel-System Component Test

Send your stackand test protocol.

Similar Products

Share This Page

Send your stack
and test protocol.