A client pre-qualification questionnaire lands with the site HSE lead. Question 14 asks for the company's alcohol and substance policy, the screening method used, and calibration records for the testing equipment. The policy exists. The devices exist, twelve of them, bought two years ago from a marketplace listing. The calibration records do not, because the alcohol breath analyser supplier who shipped them has stopped replying to email and never had a service facility to begin with.
That is the failure mode. It is almost never the device that collapses a screening programme in India. It is the supplier behind it.
So lead with the answer: choose a supplier on what happens after the invoice, not on the unit price in the listing. Calibration capability, documented sensor specifications, spare mouthpieces in stock, and a named person who takes a service call are worth more than a two thousand rupee saving per unit.
What you are actually buying from a supplier
A breath analyser is not a one-time purchase. It is a three to five year relationship with a consumable, a drifting sensor and a paper trail.
Over that period you will need mouthpieces by the hundred, an annual or semi-annual calibration for every unit, replacement sensors when accuracy falls outside tolerance, and a certificate you can hand to an auditor, an insurer or a client. Every one of those comes from the supplier, not the device.
When a purchase manager compares two quotes side by side, the cheaper one is usually cheaper because it excludes all of the above. That is not a discount. That is a deferred cost with a compliance risk attached.
Seven things to verify before you place the order
What to check Why it matters What good looks like
Sensor type stated in writing Semiconductor and fuel cell behave very differently under repeated use Datasheet naming the sensor type and accuracy tolerance
Calibration facility Readings drift; undocumented drift is unusable in a dispute In-house or clearly named calibration partner, stated turnaround
Calibration certificate Auditors and clients ask for it, not for the invoice Certificate issued per unit, per cycle, with date and reference
Mouthpiece supply A programme stops the day the boxes run out Confirmed stock and lead time for hygienic mouthpieces
Warranty scope Sensors are usually excluded in fine print Written warranty stating what is and is not covered
Service turnaround A dead unit at a gate is a gap in your record Committed working-day turnaround, address for returns
GST invoice and entity details Required for capitalisation and for audit trails Registered company, GSTIN, purchase order accepted
If a supplier cannot answer six of these seven in a single email, the eventual service experience is already visible.
Sensor type decides most of what you pay
Price differences across the Indian market look chaotic until you separate the two sensor families.
Semiconductor sensors are inexpensive and adequate for occasional personal checking. They respond to alcohol but also, to varying degrees, to other substances in breath, and they drift faster with use. These are the units in the low thousands of rupees.
Fuel cell sensors react electrochemically to ethanol specifically. They hold accuracy across far more tests, recover faster between blows, and are what any workplace running a daily screening routine should be buying. They cost several times more per unit and are worth it at volume.
The choice is set by throughput, not by budget. A family keeping one device in the car is in a different market from a plant screening 400 people at shift change. Our comparison of alcohol testing machines built for high-volume shift changes covers that throughput question in detail, and the home breath alcohol analyzer guide covers the other end.
Calibration is the real contract
Every breath analyser sensor loses accuracy over time and use. This is normal engineering, not a defect. What matters is whether it is corrected on a schedule and recorded.
Ask any prospective alcohol breath analyser supplier three direct questions:
• What is the recommended calibration interval for this model, in months or in number of tests?
• Where is calibration performed, and how many working days will my unit be away?
• Do you issue a certificate per unit, and what does it show?
A supplier who says calibration is "not required" is either selling a disposable device or has not thought about your use case. A supplier who offers loaner units during calibration has thought about it properly, because they understand you cannot leave a gate unscreened for a week.
If your programme feeds into disciplinary action, this paper trail is the difference between a defensible decision and an argument. The distinction between a screening result and an evidential one is set out in our note on what the lab measures versus what breath screening already answers.
Match the supplier to your setting
Fleet and logistics. You need ruggedness, fast recovery between tests, and enough units that a device in for calibration does not stop dispatch. Ask about bulk mouthpiece pricing and multi-unit calibration scheduling.
Factories, mines and warehouses. Throughput at gate, printer or data-logging options if your audit regime demands records, and a supplier who can service units without them leaving the state for a month.
Construction sites. Dust, heat and movement between sites. Ask specifically about operating temperature range and whether the warranty survives site conditions.
Hospitality and events. Discreet handheld units for staff checks, and in some venues for guests before valet handover. Volume is lower; hygiene expectations are higher.
Schools and campuses. Occasional use, strong emphasis on procedure and privacy. A single well-calibrated unit held by a named administrator usually beats several cheap ones.
Families. One reliable device kept in the car, understood by everyone who drives it. Guidance on reading it correctly is in our piece on what a blood alcohol level tester actually measures.
Buying online without buying blind
Most of the visible market for these devices in India sits on marketplace listings. That is not automatically a problem, but the listing tells you almost nothing about who is behind it.
Before you commit, check that the seller is the manufacturer, the authorised distributor or a service partner, and not a reseller drop-shipping a generic unit with a relabelled box. Ask for the datasheet. Ask who calibrates. Ask what happens to your order if the model is discontinued.
Our purchase manager's verification checklist for buying an alcohol breath analyser online sets out the document-by-document version of this, and why the nearest seller is rarely the right one covers the local-vendor trap.
Red flags worth walking away from
• No sensor type mentioned anywhere in the listing or datasheet
• "Police approved" or similar claims without a named certification or standard
• No mention of calibration at any point in the sales conversation
• Warranty offered verbally but not on the invoice
• No GST invoice, or a different entity name on the payment instruction
• Mouthpieces described as universal without a part number
Any one of these is survivable. Three of them together means you are buying a box, not a programme.
What a workable policy looks like
Write down who is screened, when, by whom, and what happens on a positive result before you buy anything. Screening at random rather than only after an incident. A second confirmatory blow after a short wait. A written refusal-to-test clause. Records retained for a defined period.
Then buy the equipment that supports that policy, from a supplier who can keep it calibrated for as long as the policy runs. If you are still deciding between screening at the gate and sending samples to a laboratory, our comparison of blood alcohol testers and breath analysers for safety managers and the guide to choosing a blood alcohol content tester for your site will settle it.
The person who signs the purchase order carries the consequence when a screening record cannot be produced. Choose the supplier accordingly.