Introduction
Buying a mild hyperbaric chamber is one of the few capital purchases where a photograph and a specification sheet genuinely are not enough. Two quotations can list the same pressure rating and the same seat count and still describe machines that feel completely different once the door closes: one is loud, one holds its setpoint without hunting, one has a door a technician can operate alone, one does not. That difference lives in the physical machine, and an exhibition hall is the only place where a buyer can meet several of them in a single day.
This is why exhibitions still matter here, even though most sourcing now happens over email. A chamber is a pressure vessel that people sit inside, and the things that decide whether it is pleasant to operate for a decade — weld quality, door geometry, seal condition, noise under compression, how fast the cabin reaches working pressure — are observable in person and largely invisible on paper.
Exhibitions are also a poor environment for careful judgement: noise, queues, a salesperson steering the conversation, and a pull toward whatever looks most impressive. Without a written checklist, buyers compare what is easiest to compare at a booth rather than what predicts operating cost and uptime.
This guide is a field protocol. It covers what to prepare before the show, what to observe when you first walk up to a stand, what to test inside a live demo cabin, how to verify certificates and claims without leaving the hall, how to convert a booth conversation into a factory or reference visit, and how to score vendors once you are back at your desk. It is written for clinic owners, wellness operators and distributors who are shortlisting suppliers, and it complements the written evaluation work described in our RFQ and supplier evaluation guide.
1. Before the Exhibition: Building a Shortlist and a Question Set
The quality of what you learn at a show is decided before you travel. Walk the hall with a pre-built shortlist and you will spend your time on five serious candidates; walk it without one and you will spend it on whoever has the largest stand. Start by fixing your own operating envelope — the pressure range you intend to run, the session length you plan to sell, the room you have available, and the throughput you need — because almost every question downstream is meaningless without them.
Once the envelope is fixed, build a target list from the exhibitor directory and pre-book time. Most manufacturers will hold a slot for a serious buyer, and a booked appointment is the difference between a rushed five-minute pitch and a seated conversation with someone who can answer technical questions. Send a short pre-screen note in advance asking which models will be physically present and whether a pressurised demo will be running. A supplier who cannot confirm this before the show is telling you something useful early.
| Pre-show worksheet field | What to record | Why it matters later |
|---|---|---|
| Target pressure range | The band you intend to operate in | Filters out models that cannot reach it |
| Planned session length | Minutes at working pressure | Drives comfort, oxygen interface and noise priorities |
| Available room dimensions | Length, width, height, door width | Eliminates cabins that will not fit through the door |
| Power available | Voltage, phase, breaker capacity | Some models need more than a standard circuit |
| Oxygen source plan | Concentrator, cylinder, or central supply | Changes running cost and room ventilation needs |
| Target sessions per day | Planned daily throughput | Determines whether a single cabin is enough |
| Shortlisted exhibitors | Company and stand number | Keeps the walk disciplined |
| Booked slots | Time and named contact | Guarantees access to a technical person |
| Pre-show question to send | What a strong reply looks like | What a weak reply looks like |
|---|---|---|
| Which models will be on the stand? | Named models, with sizes | “We will bring several units” |
| Will a pressurised demo run? | Scheduled demo times | “Depends on hall services” |
| Can we bring our own technician? | Yes, with advance notice | Discouraged or refused |
| Who technical will be present? | Named engineer or product manager | Sales representative only |
| Can you share a spec sheet in advance? | Sent before the show | “Available at the stand” |
Two more documents should be requested before travel: a current certificate pack and a sample specification sheet for the models you care about. Reading them in advance means you spend booth time resolving discrepancies rather than learning basics. Our certification explainer lists what a verifiable pack should contain and how to read it; if the pack does not arrive before the show, that itself is a data point worth recording.
2. Reading the Booth: What a Chamber Display Tells You Before Anyone Speaks
The first thirty seconds at a stand are diagnostic, and none of them require a salesperson.
Look first at the shell. A hard-shell cabin built from aviation-grade steel with continuous full-penetration welds presents very differently from a fabric or composite enclosure: the door frame is rigid, the viewport is a real pressure-rated window, and the structure does not rely on external bracing. Seals and gaskets are the second thing to inspect, because they are the components that determine whether a cabin holds pressure quietly over years or starts hissing and cycling. A display unit with tired seals is either old, heavily used, or poorly maintained — all relevant.
| Booth observation | What it indicates | Follow-up question |
|---|---|---|
| Continuous welds on a steel shell | Structural build, not a fabric envelope | What steel grade and weld inspection method? |
| Rigid door frame with a real viewport | Pressure-rated glazing and frame | What is the viewport material and rating? |
| Seal condition on the display unit | Maintenance culture and unit age | How often are seals replaced, and by whom? |
| Cosmetic mock-up instead of a working cabin | Nothing demonstrable | Can we see a running unit anywhere? |
| Cable and hose routing left exposed | Serviceability | How is the cabin drained and vented? |
| Documentation folder on the table | Willingness to be verified | Can we photograph the certificates? |
| Seating shown with cushions only | Comfort presented, not engineered | What is the actual seat and clearance dimension? |
| Structural cue | Look for | Interpret |
|---|---|---|
| Shell material | Aviation-grade steel, welded | Hard-shell construction; check the weld lines run continuously |
| Door operation | One-person open and close | Staff can run sessions without a second person |
| Viewport | Thick, framed, no crazing | Real pressure glazing rather than decorative acrylic |
| Interior finish | Cleanable, no exposed foam | Compatible with routine disinfection |
| Cabin floor | Flat, no trip edges | Client safety when entering and exiting |
| Penetrations | Glanded and labelled | Oxygen and electrical entries are engineered, not improvised |
The third read is the comparison between hard and soft construction, which is the single most consequential decision in mild HBOT. If both types are present in the hall, stand in each one before you speak to anyone. Our hard-shell versus soft-chamber comparison goes through the trade-offs in detail; at a show, the useful thing is to form your own first impression of the space, the door and the sense of enclosure, because that impression is often what your clients will have.
3. The Live Demo Protocol: What to Test Inside an HBOT Chamber
A live pressurised demo is the highest-value twenty minutes available at any exhibition, and it is frequently skipped because buyers feel awkward asking. Ask anyway. Sitting inside a cabin while it comes up to working pressure tells you more than any other single activity at the show, and it converts several specification lines from abstract numbers into things you have personally felt.
Run the demo as a fixed sequence rather than a conversation. Start outside the cabin and watch the pressurisation phase: note how long the cabin takes to reach working pressure, whether the rate is smooth or stepped, and whether the compressor noise rises sharply near the top of the range. Confirmed pressurisation time across the range sits in the five-to-twenty-five-minute band, so a unit in this category should be inside it; a demo that never actually completes a pressurisation cycle is not a demo.
| Demo step | Approximate time | What to observe | Pass criterion |
|---|---|---|---|
| Pre-entry walkaround | 3 min | Door, seals, viewport, controls | No visible damage or improvised parts |
| Entry and seating | 2 min | Step height, clearance, seat support | Client can enter unassisted |
| Door closure | 1 min | Latching force, one-person operation | One operator can close and latch |
| Pressurisation | 5–25 min | Rate, smoothness, compressor noise | Smooth rise inside the stated band |
| Equalisation | 2 min | Ear comfort, guidance given | Operator explains the technique clearly |
| Oxygen interface fit | 3 min | Mask or hood seal and comfort | Comfortable for a full-length session |
| Plateau hold | 5 min | Noise, temperature, ventilation | Conversation possible; no hot spots |
| Intercom check | 1 min | Two-way clarity under pressure | Clear speech both directions |
| Emergency call check | 2 min | How the call is raised and answered | Demonstrated, not described |
| Controlled descent | 5–10 min | Rate, comfort, door release | Smooth, no abrupt pressure steps |
Noise deserves specific attention because it is the second most common source of client complaint after ear equalisation. A quiet cabin is a genuine differentiator, and the only honest way to judge it is to be inside while the compressor is working. One confirmed data point you can anchor to: the AURA One is specified at no more than 50 dB. Use that as your reference tone and judge everything else relative to it, rather than trusting adjectives. Our noise and vibration control guide explains how to read a decibel claim and why the measurement condition matters.
| Noise observation | How to judge it in a demo | Why it matters commercially |
|---|---|---|
| Compressor tone at plateau | Is conversation easy? | Determines whether clients relax or endure |
| Change in tone near top pressure | Does the pitch or volume jump? | Predicts complaints on longer sessions |
| Structure-borne hum through the seat | Can you feel it through the frame? | Indicates mount isolation quality |
| Noise at the client’s ear | Is the mask or hood adding hiss? | Affects perceived quality most directly |
| Reference point | AURA One, 50 dB or less | Gives you a fixed anchor across vendors |
Comfort and the oxygen interface are the fourth test. Mild chambers are air-pressurised, and oxygen is delivered to the client through a mask or hood; the delivered concentration differs by model, with the AURA One at or above 80% and the other models at or above 90%. What matters in the booth is not the number but the fit: whether the hood stays comfortable when you lean back, whether the mask seals without pressure on the bridge of the nose, and whether the tubing is routed so it does not tug when the client shifts position. If you are looking at a single-person cabin, our AURA One page carries the confirmed specification you can compare your notes against.
| Interface check | What to feel for | Recording note |
|---|---|---|
| Hood or mask seal | No leak at the cheek or jaw | Note model and size used |
| Head support | Neck relaxed after five minutes | Note whether a cushion was added |
| Tubing routing | No tug when shifting position | Photograph the routing if allowed |
| Reach to controls | Client can reach the call button | Note button location |
| Ventilation feel | No stuffiness at plateau | Note vent position and audible flow |
4. Safety Systems to Verify on the Floor, Not on Paper
Safety is the category where booth behaviour and documentation diverge most. Every supplier will say their chamber is safe; far fewer will demonstrate the specific systems that make it safe while you are standing there. Ask for demonstrations, not descriptions, and note which ones were actually performed. A vendor who walks you through the redundancy on their own initiative is showing you how they will behave when something goes wrong later.
Three systems deserve a direct question. The first is over-pressure protection: the confirmed design uses three independent relief paths — mechanical, electromagnetic and manual — so the question to ask is where each one is, how it is tested, and what the operator does if one of them fails. The second is communication and emergency calling: the confirmed design includes a 4G emergency call capability, and you want to see how it is raised from inside the cabin and who receives it. The third is manual descent, which is the one that matters most in a power failure.
| Safety system | What to ask to see | Acceptable demonstration | Unacceptable answer |
|---|---|---|---|
| Mechanical relief | Physical valve and its set point | Valve shown, set point stated | “It is automatic” with no location given |
| Electromagnetic relief | How it is triggered and reset | Trigger logic explained | “It is built in” |
| Manual relief | Where the operator reaches it | Operator physically points to it | Not identified on the display unit |
| 4G emergency call | How the call is raised and routed | Button shown, routing explained | Described but not demonstrated |
| Manual descent | Procedure with no power | Steps walked through | “It would never be needed” |
| Intercom | Two-way speech under pressure | Tested during the demo | Assumed to work |
The fourth thing to raise, and the one that separates a serious manufacturer from a reseller, is screening. Any credible supplier will talk unprompted about client screening and contraindications. The absolute contraindication you should hear named is untreated pneumothorax; a booth that cannot articulate a screening position, or that suggests screening is unnecessary because the pressure is “mild”, is a serious warning sign regardless of how good the cabin looks. Screening is also the area where your own operating risk concentrates, so treat the vendor’s answer as evidence of whether they will support you operationally after delivery.
| Screening question | Strong answer | Warning sign |
|---|---|---|
| What is the absolute contraindication? | Untreated pneumothorax named immediately | Vague or deflected |
| Who clears a client before a first session? | A named clinical role in your organisation | “The operator decides” |
| Is a screening form provided? | Yes, with the delivery package | Not offered |
| What happens if a client cannot equalise? | A defined stop and re-check procedure | “They get used to it” |
| Is written guidance included? | Manuals and SOP support provided | Verbal guidance only |
5. Questions to Ask on the Floor — and Answers That Should Worry You
Most booth conversations are dominated by the seller’s script. The counter is a prepared list of questions with known good answers, asked in the same order at every stand so that the replies are genuinely comparable. Below is a compact set covering the areas where an inaccurate answer has real consequences downstream.
| Question | Good answer | Red flag |
|---|---|---|
| What pressure does this model actually reach? | A stated figure inside the confirmed range | A range with no model-specific value |
| Is the cabin air-pressurised with mask or hood oxygen? | Yes, with the interface described | Implies the cabin itself is filled with oxygen |
| What is delivered oxygen concentration? | AURA One at or above 80%; others at or above 90% | A number with no model attribution |
| How long to reach working pressure? | A figure inside the 5–25 minute band | “Very fast” with no number |
| What is the noise level? | A measured dB figure with conditions | “Very quiet” |
| What is the shell and how is it welded? | Aviation-grade steel, full welds | “Strong material” |
| Which certificates apply? | CE and ISO 13485, documents available | Unverifiable claims |
| Is there an FDA clearance? | No — and the vendor says so clearly | Any implication of FDA clearance |
| Who installs and commissions it? | Named engineering support | “It is plug and play” |
| What happens if it fails in month eight? | Warranty terms and response commitments | “Call us” |
The certification answer is where buyers should slow down. For this category the credentials to expect are CE marking and ISO 13485 quality-system certification, and the test is whether the documents can be produced and checked rather than asserted. Equally important is what a supplier should not claim: there is no FDA clearance being claimed for these chambers. Note the answer verbatim, because it is the kind of detail that disappears from memory by the end of a long day.
| Claim heard at a booth | How to handle it |
|---|---|
| A pressure figure with no model attribution | Ask for the model-specific spec sheet before scoring |
| “Medical grade” with no certificate | Ask which standard and which document evidences it |
| An FDA reference of any kind | Ask for a written statement; treat evasion as a negative |
| Certificate shown only as a photo on a screen | Request the document with scope and date |
| Performance described in superlatives | Convert to a number or mark the criterion as unverified |
6. Verifying Certificates and Specifications Without Leaving the Hall
Verification at a show does not mean auditing; it means capturing enough to check later. Ask to photograph the certificate front pages and the specification sheets for the exact models you are considering, and capture the identifiers that make a document traceable — issuing body, certificate number, scope and validity. A supplier who refuses photographs of their own certificate is telling you more than the certificate would.
Where a document is shown on a tablet screen, ask for it to be sent by email while you are standing there, so the request and the reply are both timestamped to the show. Cross-check the scope against the model name you were quoted; a common failure is a certificate whose scope covers a different product family than the cabin being sold.
| Document | Field to capture | Mismatch signal |
|---|---|---|
| CE documentation | Model covered, directive, issuing body | Scope names another model family |
| ISO 13485 certificate | Issuing body, number, validity dates | Expired or scope excludes design |
| Specification sheet | Model, pressure, dimensions, power | Figures differ from the booth claim |
| Electrical data | Voltage, phase, rated load | Not compatible with your supply |
| Manuals | Language availability | Not available in your operating language |
| Warranty statement | Term and what is excluded | Term stated verbally only |
| Spec field to record at the booth | Why it is hard to get later |
|---|---|
| Exact model designation | Brochures often show a family name |
| Working pressure per model | Sales literature quotes a range |
| External and internal dimensions | Needed for your door and room check |
| Rated electrical load | Needed for your electrician before you sign |
| Oxygen interface type | Determines consumables and cleaning |
| Noise figure and conditions | Frequently omitted from brochures |
| Pressurisation time | Affects throughput planning |
| Delivered oxygen concentration | Model-specific, not range-wide |
7. From Booth to Factory: Turning a Conversation into Evidence
A booth conversation is a claim. A factory visit and a reference visit are evidence. Most serious buyers in this category do both before signing, and an exhibition is the cheapest place to start the process because you already have the right person in front of you and a shared reason to continue talking.
Request a factory visit before you leave the stand, with a proposed agenda. What you are looking for is not a showroom but the production and test area: whether shells are welded in-house, whether there is a pressure test rig, whether there is a documented incoming inspection for critical components, and whether finished units are actually run before packing. Ask specifically to see a unit at the same stage yours would be at.
| Factory visit element | What to look for | Question to ask |
|---|---|---|
| Welding area | Shells welded in-house, qualified procedures | Are welders qualified and records kept? |
| Pressure test | Evidence of a test on every unit | What pressure and hold time? |
| Incoming inspection | Critical parts checked and logged | Which components are traceable by serial? |
| Final run-in | Units operated before packing | How long is the run-in? |
| Packing | Export-grade crating | What is the crating method for sea freight? |
| Spare parts store | Critical spares held | Which parts are stocked and where? |
| Reference visit element | What to ask the operator |
|---|---|
| Uptime | How many days lost to faults since installation? |
| Service response | How quickly was a fault resolved? |
| Noise in practice | Does it match what was promised? |
| Cleaning burden | How long does a changeover actually take? |
| Client acceptance | Do clients complete full courses? |
| Would they repeat | Would they buy the same model again? |
Where a factory visit is not practical, ask for a live video walkthrough with the same agenda; a supplier’s willingness to do so is itself informative.
8. Scoring Vendors After the Show: A Weighted Comparison
By the end of a show you will have impressions, photographs, a handful of spec sheets and a stack of business cards, and those are not comparable as they stand. Convert them into a scorecard on the day after, while the impressions are fresh, using weights you set before you saw any scores. This is the step that turns a busy two days into a defensible decision.
Keep the criteria few enough to score honestly. Nine or ten dimensions is workable: build quality as observed, demo performance, safety demonstration, documentation quality, service and support clarity, commercial terms, lead time, and the subjective but real question of whether you would want to work with this company for a decade. Score each from one to five and weight by importance to your operation.
| Criterion | Weight | Score 1 | Score 3 | Score 5 |
|---|---|---|---|---|
| Shell and weld quality observed | 15% | Soft or improvised finish | Adequate, some concerns | Continuous welds, clean finish |
| Demo performance | 15% | No demo offered | Partial demo | Full pressurised cycle |
| Safety systems demonstrated | 15% | Described only | Some shown | All shown, operator confident |
| Documentation and certificates | 15% | Unverifiable | Partial pack | Full pack, scope matches model |
| Service and spare parts clarity | 10% | Vague | General commitments | Named terms and stocked parts |
| Commercial terms | 10% | Unclear | Standard terms offered | FOB, CIF or DDP offered with T/T or LC |
| Lead time and delivery realism | 10% | No answer | Approximate | Stated with conditions |
| Training and handover | 5% | Not mentioned | Manuals only | Training and SOP support |
| Would we work with them long term | 5% | No | Maybe | Yes |
| Score band | Interpretation | Next action |
|---|---|---|
| Weighted 4.0 and above | Strong candidate | Move to written RFQ and contract review |
| Weighted 3.0 to 3.9 | Viable with gaps | Ask for the gaps to be closed in writing |
| Weighted 2.0 to 2.9 | Weak fit | Keep as a comparison only |
| Below 2.0 | Not viable | Drop from the shortlist |
| Any score of 1 on safety | Disqualifying regardless of total | Remove from consideration |
One rule should be non-negotiable: a score of one on safety demonstration disqualifies a vendor regardless of the weighted total. Every other dimension can be traded off; the willingness to demonstrate over-pressure protection, emergency calling and manual descent cannot. Note also that commercial terms are worth capturing at the show, since the confirmed Incoterms available are FOB, CIF and DDP with payment by T/T or LC, and a supplier who cannot discuss these at all is usually not exporting at scale.
9. After the Exhibition: From Business Card to RFQ
The value of a show decays quickly. Within a week, send each shortlisted vendor a short follow-up that restates what you saw, lists the open questions you recorded at the booth, and asks for written answers. Vendors respond very differently to this, and the quality and speed of the response is one of the best predictors of what after-sales support will feel like.
Convert your notes into a handover pack before they go cold: photographs, the specification fields you captured, the demo observations, and the scorecard. Then move to the written stage. The booth work has told you which machines feel right; the written stage establishes what will actually be delivered, at what price, under what terms and with what remedies. That process — specification sheets, bid comparison matrices, contract clauses and acceptance testing — is set out in our RFQ and supplier evaluation guide, and the two activities are designed to run in sequence rather than in parallel.
| Post-show window | Action | Output |
|---|---|---|
| Day 1 | Write up notes and score every vendor | Completed scorecard |
| Day 2 to 3 | Send written follow-up with open questions | Sent, timestamped |
| Week 1 | Collate certificates and spec sheets received | Document pack per vendor |
| Week 2 | Convert notes into a formal specification | Draft specification sheet |
| Week 3 | Issue RFQ to the shortlisted vendors | RFQ sent |
| Week 4 to 6 | Compare bids and request clarifications | Comparison matrix |
| Week 6 to 8 | Contract review and acceptance criteria | Draft contract |
| Handover item | Where it goes in the RFQ |
|---|---|
| Model designation | Specification section |
| Pressure and oxygen concentration | Performance requirements |
| Dimensions and weight | Installation constraints |
| Electrical load | Utility requirements |
| Noise figure and conditions | Acceptance criteria |
| Certificates captured | Compliance requirements |
| Service terms discussed | Warranty and support section |
| Incoterms and payment | Commercial section |
10. Conclusion
Exhibitions reward preparation. A buyer who arrives with a fixed operating envelope, a pre-screened shortlist, a demo protocol and a scoring sheet will extract more decision-grade information from two days on a hall floor than from a month of email exchange, because the things that separate a good chamber from a merely adequate one are physical: how it welds, how it pressurises, how loud it is at plateau, whether the door can be worked by one person, and whether the supplier will demonstrate its safety systems rather than describe them.
The sequence that works is straightforward: fix your envelope and pre-book technical time before the show; read the booth before speaking, then run a full pressurised demo against a written observation list; verify documents where you stand; convert the best conversations into visits; score every vendor the next day; disqualify anyone who will not demonstrate safety; then move the shortlist into a written RFQ.
If you would like to walk through a demo checklist against a specific model before your next exhibition, or want the confirmed specifications for any of the five models in the range, the team can be reached through the contact page.
Medical disclaimer: This article is provided for general informational purposes only and is not medical advice. Hyperbaric oxygen therapy should only be undertaken under the supervision of qualified healthcare professionals, and individual suitability must be assessed by a clinician. Untreated pneumothorax is an absolute contraindication. The chambers described are CE marked and manufactured under an ISO 13485 quality management system; no claim of FDA clearance is made or implied. Always follow the instructions for use and local regulatory requirements.