Laboratory Equipment & Instrumentation
Selection, operation, calibration and maintenance guidance for laboratory equipment: liquid handling, sterilisation, weighing, centrifugation, containment, glassware and cold storage.
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Most laboratory equipment failures are not dramatic. They are a pipette drifting out of tolerance between calibrations, an autoclave cycle that reaches temperature but not sterility, a balance reading inconsistently because of an air current. These failures are silent, they contaminate results retrospectively, and they are almost entirely preventable through correct selection, routine verification and documented maintenance.
This section covers laboratory equipment from that operational standpoint: how to choose an instrument for a specific application, how to verify it is performing correctly, and how to maintain it.
How this section is organised
- Liquid handling — micropipettes, serological and volumetric pipettes, tip compatibility, and calibration intervals.
- Sterilisation and decontamination — autoclave cycle types, biological indicators and spore testing, validation and maintenance.
- Weighing and measurement — analytical versus precision balances, calibration practice, and pH meter selection and calibration.
- Centrifuges and sample preparation — centrifuge and rotor selection, the RCF versus RPM distinction, vortex mixers and water baths.
- Analytical instrumentation — spectrophotometers, and HPLC vials and consumables where seal integrity affects data quality.
- Containment and airflow — biosafety cabinets, fume hoods and laminar flow hoods, which protect different things and are routinely confused.
- Glassware and labware — vessel types by function, borosilicate versus soda-lime glass, cleaning and autoclavability.
- Cold chain and storage — ULT freezers, cryogenic storage, desiccators, and flammable storage cabinets.
- PPE and personal safety — glove, coat and eye protection selection by specific hazard.
- Equipment fundamentals — lab planning, preventive maintenance, and IQ/OQ/PQ qualification.
Specification is a research-integrity question
Equipment specification is often treated as a procurement detail, but it determines whether results are defensible. An analytical balance with insufficient readability cannot support the precision a method claims; a centrifuge protocol specified in RPM rather than RCF will not reproduce on a rotor with a different radius; a pipette outside its calibration interval invalidates every volume it dispensed since the last verification. Pages here give the specifications that matter for a given application rather than a feature list.
Related sections
For the accreditation and quality frameworks that govern calibration and maintenance records, see Laboratory Compliance & Quality. For bench protocols and day-to-day operations, see Laboratory Operations.
More guides in this cluster
Showing 34 of 275 guides directly — the rest are organised into the topic hubs above.
Freezer and Cold-Room Temperature Mapping Protocol
A temperature mapping study characterizes hot and cold spots inside a freezer or cold room before it’s trusted for regulated storage — distinct from calibrating a single logger or comparing qualification vs. validation.
What Is a Latex Glove?
A plain-language explanation of what a latex glove is: the natural-rubber material, why many institutions restrict or avoid it over allergy risk, and how it compares to nitrile and vinyl.
What Is an N95 Respirator?
What an N95 respirator actually is, how it differs from a surgical mask and a KN95, and what occupational respiratory-protection compliance involves.
What Is a Nitrile Glove?
A plain-language explanation of what a nitrile glove is: the synthetic, latex-free material, why it replaced latex and vinyl in clinical and lab settings, and who actually uses it.
What Is a Glove Box?
What a lab glove box is, why it exists, and how it differs from a biosafety cabinet, fume hood, and laminar flow hood.
What Is Lab PPE? Personal Protective Equipment for Research Labs
What personal protective equipment (PPE) means in a research lab specifically: gloves, lab coats and gowns, and eye/face protection, and how the hazard type in front of you drives which one is correct.
What Is a Centrifuge? Types, RCF vs. RPM, and Common Lab Uses
A centrifuge spins samples to separate their components by density using centrifugal force. This guide covers the main types (microcentrifuge, high-speed, ultracentrifuge), the RCF vs. RPM distinction, common lab applications, and who in a research organization deals with selecting, maintaining, and budgeting for one.
What Is an Autoclave?
A plain-language explanation of what an autoclave is, how pressurized steam sterilization works, the main autoclave types, and how it’s used in research and clinical labs.
What Is a Micropipette?
A plain-language guide to what a micropipette is: the microliter-range instrument every wet lab relies on, how air- and positive-displacement mechanisms differ, how it differs from a general-purpose pipette, and why calibration and tip selection both matter for accuracy.
What Is a Laminar Flow Hood?
A laminar flow hood uses HEPA-filtered, unidirectional airflow to protect a sample or sterile work surface from contamination — not to protect the operator. This guide explains horizontal vs. vertical flow, typical uses, and how it differs from a biosafety cabinet and a fume hood.
What Is a Fume Hood?
A fume hood is a ventilated enclosure that exhausts hazardous chemical vapors, gases, and fumes away from the person working at it. This guide explains how it works, how it differs from a biosafety cabinet and a laminar flow hood, and what research administrators need to know about selecting and maintaining one.
What Is a Pipette?
A plain-language guide to what a pipette is, the main pipette types used in labs, and why calibration and tip selection matter for accurate results.
Centrifuge Rotor Care: Inspection, K-Factor and Log-Keeping
How rotor k-factor determines which geometry a separation actually needs, what to check on inspection, and what a defensible per-rotor usage log should record.
Centrifuge K-Factor and Pelleting Time Calculations: Converting a Published Protocol to Your Rotor
K-factor is the number that lets you convert a published pelleting time from one centrifuge rotor to another. Here is the formula, a worked example, and the specific conditions under which the conversion stops being reliable.
Derivatization for GC-MS: Silylation, Acylation and Alkylation
A functional-group-by-functional-group guide to choosing between silylation (BSTFA/MSTFA/MTBSTFA), acylation, and alkylation for GC-MS, plus the moisture-control and derivative-stability practices that determine whether the reaction actually works and survives to injection.
ICP-MS Sample Preparation and Acid Digestion: Choosing Open-Vessel, Microwave, or Fusion by Matrix
Choosing between open-vessel, microwave-assisted, and fusion digestion for ICP-MS sample prep, by sample matrix, with acid selection and the contamination controls that determine whether a trace-level result is real.
PBMC Preparation and Staining for Flow Cytometry
How to isolate PBMCs by Ficoll-Paque density-gradient centrifugation and prepare them for flow cytometry staining, covering viability handling at each stage, Fc receptor blocking, and the specific artefacts cryopreserved samples introduce.
Data Logger Calibration and Validation for Temperature Monitoring
How to calibrate and validate temperature-monitoring data loggers: reference traceability, calibration intervals, as-found/as-left data retention, and the 21 CFR Part 11 expectations that apply to the calibration record itself.
SPE Cartridge Selection and Method Optimization: Sorbent Choice and the Wash-Step Trade-Off
A method-development guide to solid phase extraction: choosing a sorbent from analyte pKa and log D, the strong-versus-weak exchanger rule, and how to find the highest wash strength your analyte survives.
Cryogenic Storage & Liquid Nitrogen Dewars Safety Protocol
A safety protocol for liquid nitrogen storage: the 694:1 expansion ratio that makes oxygen displacement the primary hazard, the cryogenic PPE required, oxygen-depletion sensor placement and alarm escalation, and safe handling of vapour- and liquid-phase dewars.
Autoclave Preventive Maintenance Checklist & Steam Traps
A preventive maintenance schedule for laboratory autoclaves: daily drain-strainer cleaning, door gasket inspection, chamber descaling, and how to test a thermodynamic steam trap – the failure that most often surfaces as an aborted or under-temperature cycle.
Types of Laboratory Glassware: Borosilicate vs Soda-Lime
How to choose laboratory glassware: what separates Type 1 borosilicate 3.3 from soda-lime glass on thermal expansion, hydrolytic resistance and chemical leaching, which applications tolerate which, and where autoclaving or thermal shock will break the cheaper option.
Research Laboratory Design: Cleanroom & Airflow Standards
How research laboratory airflow is designed: ISO 14644-1 cleanroom particulate classes, air change rates, differential pressure cascades and room pressurisation, and how containment level, fume ventilation and cleanliness requirements are reconciled in one HVAC scheme.
Precision Balance vs Analytical Balance: Lab Guide
When a precision top-loading balance is enough and when the work needs an analytical balance: readability and capacity boundaries, why the draft shield matters, environmental sensitivity, and how USP weighing tolerances decide the choice for assay work.
Biosafety Cabinet Certification & NSF 49 Testing Guide
What NSF/ANSI 49 field certification of a Class II biosafety cabinet actually involves: downflow and inflow velocity profiles, HEPA filter leak scanning, smoke pattern tests, what triggers recertification, and how Type A2, B1 and B2 cabinets differ in practice.
Analytical Balance Calibration & USP 41 Minimum Weight Guide
How to calibrate and qualify an analytical balance under USP General Chapters 41 and 1251: the repeatability and accuracy tests, how to calculate minimum sample weight from measured repeatability, weight-class selection, and the disturbances that invalidate a reading.
Microcentrifuge Operation, RCF Calculation, and Lab Safety
A working SOP for benchtop microcentrifuges: converting RPM to relative centrifugal force for your own rotor radius, fixed-angle versus swinging-bucket selection, precision balancing geometries, and aerosol containment and spill response after a tube failure.
Laboratory Water Bath Calibration, Maintenance, and SOP
An SOP for laboratory water baths: deionised versus distilled water and why the choice affects corrosion, semi-annual NIST-traceable temperature calibration, and the monthly drain-and-disinfect routine that keeps a 37 C reservoir from becoming a contamination source.
Ultra-Low Temperature (-80°C) Freezer Maintenance & SOP
A maintenance SOP for -80 C ULT freezers: how the dual-cascade refrigeration loop fails, the condenser filter, gasket de-icing and vacuum-breaker schedule that prevents it, the defrost procedure, alarm escalation and telemetry, and what to do when a unit is losing temperature.
Laboratory Desiccator Types, Operation, and Maintenance
How to use and maintain a laboratory desiccator: vacuum versus standard glass and polycarbonate types, choosing between silica gel, calcium sulfate and phosphorus pentoxide, ground-glass flange greasing, safe vacuum release, and thermal regeneration of spent desiccant.
Autoclave Spore Testing: Biological Indicators Guide
How to run and interpret an autoclave spore test: why Geobacillus stearothermophilus is the challenge organism, self-contained vials versus spore strips, process challenge device placement, incubation parameters, and the CAPA steps a positive result requires.
How to Specify and Buy Nitrile Gloves for the Lab
A specification-first buying guide to nitrile lab gloves: exam-grade vs. general-purpose vs. chemotherapy-rated, ASTM D6319 and AQL/pinhole rate, chemical-compatibility limits, sizing, and facility-scale procurement mechanics.
Types of Laboratory Glassware: Volumetric vs. General-Purpose, Explained
A selection-and-accuracy reference for laboratory glassware: the volumetric vs. general-purpose distinction, TC/TD markings, Class A vs. Class B tolerances, borosilicate vs. soda-lime glass, and which vessel is correct for which task.
Pipette Tips: Selection Guide by Application
How to choose pipette tips by application: filter/barrier vs. standard, low-retention vs. standard, sterile vs. autoclavable, and rack vs. bulk format, plus how tip choice interacts with pipette calibration validity.
