Quick facts
- United States: a discrete photometric chemistry analyser for clinical use is a named entry — 21 CFR 862.2160 — and sits in Class I.
- United States: a micro chemistry analyser for clinical use sits in its own entry at 21 CFR 862.2170 and is also Class I.
- Canada: a chemistry analyser is an in vitro diagnostic device, and its class comes from the rules in Part 2 rather than from a named entry.
- Canada: Rule 7 provides that where an IVDD, including its analyzers, reagents and software, is intended to be used with another IVDD, the class of both is the class of the higher-risk device.
- Canada: an assay run for diagnosis or patient management is Class II, and it rises to Class III for cancer screening, genetic testing, fetal screening, disease staging or where an error is imminent dangerous.
- Canada: the regulation text cited here is current to 2026-09-21 and was last amended on 2026-06-17.
A chemistry result is read the same way on both sides of the border, but the two systems behind the analyser do not fix the class the same way. One names the analyser and gives it a class of its own; the other classes the analyser by the assays it runs. For a laboratory buyer, that split decides what the analyser's file has to carry and what changes when a new assay is added to the menu.
What is a discrete photometric chemistry analyser?
It is an instrument that measures a chemical reaction by light, one reaction vessel at a time, and it is used to run the routine chemistry menu of a clinical laboratory.
The instrument is a diagnostic analyser rather than a reagent or a kit. A sample is placed in a cuvette or a well, a reagent is added, and the change in light absorbance is read and turned into a concentration. The discrete step — one vessel per test — is what separates it from a continuous-flow analyser, and the photometric reading is what separates it from an ion-selective or chromatographic system.
That role is what the American entry names and what the Canadian rules reach. The analyser does not diagnose anything by itself; it produces a number that is read against a reference range, and the classification follows the use that number is put to.
| Item | Canada | United States |
|---|---|---|
| How the analyser is described | By rule, as an IVDD | A named entry at 21 CFR 862.2160 |
| Class for the analyser alone | Class II under the diagnosis rule | Class I |
| Class when bundled with a higher-risk assay | The higher of the two classes (Rule 7) | Still the analyser entry |
| What a filing cites | The rule and the assay in use | The device entry and product code |
What does the American entry cover, and what class does it carry?
It names the analyser type and fixes a low class, and the class holds for the analyser whether the menu is short or long.
21 CFR 862.2160 describes a discrete photometric chemistry analyser for clinical use and places it in Class I, and it is filed under products such as the analyser code JJE. A micro chemistry analyser for clinical use has its own entry at 21 CFR 862.2170, also in Class I. The analyser is therefore regulated as an instrument and at a class set by the entry, not by the menu.
What this means for a buyer is that a chemistry analyser in the United States is bought against a stable entry. Adding an assay to the menu changes the reagents and the claims, not the class of the instrument.
How do Canada and the United States classify a chemistry analyser?
It classes the analyser by the rules in Part 2, and the analyser is not treated in isolation from the assays it runs.
An analyser intended for diagnosis or patient management is placed in Class II, and it moves to Class III where an erroneous result could lead to a management decision that creates an imminent life-threatening situation. The general diagnostic rule does the same for use in diagnosis, with the higher class applying where an error could cause death or severe disability or where the device is used for cancer screening, genetic testing, fetal screening or disease staging.
The decisive rule for an analyser is the one on combined devices. Where an IVDD, including its analyzers, reagents and software, is intended to be used with another IVDD, the class of both is the class of the higher-risk device. A chemistry analyser that runs a Class III assay therefore carries that higher class, because the analyser and the assay are taken together.
| Analyser situation | US entry and class | Canadian basis | Canadian class |
|---|---|---|---|
| Discrete photometric analyser, general menu | 862.2160, Class I | Diagnosis, Part 2 Rule 4 | Class II |
| Micro chemistry analyser | 862.2170, Class I | Diagnosis, Part 2 Rule 4 | Class II |
| Analyser used with a higher-risk assay | Analyzer entry unchanged | Rule 7, higher-risk device | Class II or III |
| Analyser run for disease staging | Analyzer entry unchanged | Part 2 Rule 4, staging | Class III |
Does the same analyser fall in a different class between Canada and the United States?
It falls into a different class, and the gap can be two classes wide. The American entry holds the analyser in Class I, while the Canadian rules can place the same analyser in Class II for a routine menu and in Class III once a staging or screening assay is added.
This is the point most often missed when a laboratory compares two quotations on specification alone. The specifications describe the instrument; they do not describe the assay menu, and in Canada the menu is part of the classification. A laboratory that buys the same analyser as a neighbouring site but runs a different menu has a different classification premise.
The practical consequence is that the assay menu has to be recorded with the instrument. A purchase record that carries the analyser alone is a record that cannot answer a class question, because in Canada the analyser's class is only as low as the highest-risk assay it is used with.
When does an assay pull a chemistry analyser into a higher class in Canada?
It pulls the analyser up as soon as an assay on the menu carries a higher class. That is what the combined-device rule is written to do.
A staging assay, a cancer screening assay, a genetic assay or a fetal screening assay each carries a class above the routine diagnostic class. Once an analyser is intended to be used with one of those, the analyser is read against the higher class, because the analyser and the assay are classified as a pair. The same analyser with a routine menu stays lower.
In the United States the analyser entry does not move with the menu, so the reagent or the kit is where a higher class appears if it appears at all. A laboratory comparing the two systems therefore has to track the class on the reagent side in the United States and on the instrument side in Canada.
Which consumables does a chemistry bench restock?
A chemistry bench runs on the collection and handling lines that surround the analyser. The 120 mL sterile screw-cap container carries a specimen that has to be held before it is run, and the graduated specimen cups cover the handling step. For a laboratory that also runs its own sterilisation cycle, the sterilization monitoring collection pairs with the 24-hour monitoring five-pack trial. For clinics and multi-site groups buying at case level, the wholesale ordering page sets out account and case terms, and the B2B wholesale collection lists the lines held for institutional buyers. Reselling? become a distributor.
Sources
- 21 CFR 862.2160, discrete photometric chemistry analyzer
- 21 CFR 862.2170, micro chemistry analyzer
- 21 CFR 862.1120, blood gases and blood pH test system
- 21 CFR 862.1660, quality control material (assayed and unassayed)
- 21 CFR 862.2050, general purpose laboratory equipment for a specific medical use
- Medical Devices Regulations, SOR/98-282
- ISO 15189:2022, medical laboratories
- ISO 13485:2016, medical device quality management
- ISO 14971:2019, risk management of medical devices
- IEC 61010-1:2010, safety of electrical measuring equipment
- ISO 15197:2013, blood glucose monitoring systems
- openFDA device classification API
- CLSI, clinical and laboratory standards
- Public Health Ontario, laboratory services test index
- CCOHS, OSH answers
- College of Optometrists of Ontario, standards of practice
- Opto, eye health library
- American Academy of Ophthalmology, dry eye
- Ad Standards, non-prescription and cosmetic guidelines
- Canadian Dental Association
A chemistry bench whose control record is missing is a bench that cannot answer a question about the last run. The downloadable chemistry bench log is a free sheet with columns for the analyser, the assay, the control result, the operator and the date, so a quality-control record is written down rather than remembered. The bench log generator sized to a chemistry analyser builds the sheet from the number of analysers a laboratory runs and the assays on each menu. No account and no sign-up are needed to open either one.
Ordering chemistry consumables for a reference lab or a physician's office? See the wholesale ordering page.
Related reading
- Microplate Readers in Canada vs the US: Which Class
- Stage Micrometers in Canada vs the US: Which Device Class
- 95 kPa Bags vs Rigid Containers for Sample Transport
CliniEco Medical supplies laboratory, eye care and dental consumables of the kind described in this article. MDEL #35334. This article is written for optometry, laboratory and procurement professionals and is not legal advice; the class of an analyser and the records kept by a laboratory belong to the laboratory and to the requirements that apply to it.
Frequently Asked Questions
Is a clinical chemistry analyser a Class I device in the United States?
A discrete photometric chemistry analyser for clinical use is Class I under 21 CFR 862.2160, and a micro chemistry analyser for clinical use is Class I under 21 CFR 862.2170.
Why is the same analyser a higher class in Canada?
Canada classes the analyser by the rules, and an analyser used for diagnosis or patient management is Class II. When it is used with a higher-risk assay, Rule 7 gives the analyser and the assay the class of the higher-risk device.
What does Rule 7 do for an analyser?
Where an IVDD, including its analyzers, reagents and software, is intended to be used with another IVDD, the class of both is the class of the device that represents the higher risk.
When does an assay push a chemistry analyser to Class III in Canada?
When the assay is used for cancer screening, genetic testing, fetal screening, disease staging or where an erroneous result could cause death or severe disability or create an imminent life-threatening situation.
Does the American entry change when the menu changes?
No. The analyser entry stays in Class I while the instrument matches it, and any higher class sits with the reagent or the kit rather than with the analyser.
What record should carry the analyser and its menu?
A record that names the analyser, the assays on its menu and the control results for each. In Canada the class can rest on the highest-risk assay, so the menu belongs with the instrument on the same sheet.
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