Iron ring (laboratory)

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An iron ring or ring clamp is an item of laboratory equipment which comprises a conjoined metal ring and radially-extending rod.^[1] In some cases, the rod terminates in a screw clamp for attachment to a retort stand or other support; in others, the rod may be attached to a stand by means of a laboratory clamp holder.^[2] Iron rings are commonly used in chemistry laboratories for supporting apparatus above the work surface, for example:

a tapered item such as a filter funnel or separatory funnel.
a clay triangle,^[1] which itself supports an item such as a crucible.
a wire gauze,^[1] which itself supports a flat-bottomed beaker or conical flask.
a large, and therefore heavy, round-bottom flask.

In some cases, a slot is cut in the side of the ring opposite the rod. This is to allow a funnel to be placed upon and removed from the ring from the side rather than from above, a safer procedure.

References

^ ^a ^b ^c "Tutorial on Supports". Archived from the original on March 4, 2016. Retrieved December 17, 2014.
^ "Holder". Retrieved December 17, 2014.

Laboratory equipment

General

Heaters Dryers	Alcohol burner Bunsen burner Desiccator Heating mantle Hot plate Lab oven Kiln Meker–Fisher burner Striker Teclu burner Water bath Vacuum dry box
Mixers Shakers	Chemostat Homogenizer Liquid whistle Magnetic stirrer Mortar and pestle Shaker Sonicator Static mixer Stirring rod Vortex mixer Wash bottle
Stands Clamps Holders	Beaker clamp Clamp holder Tripod Burette clamp Extension clamp Flask clamp Funnel support Iron ring Pinch clamp Retort stand Screw clamp Test tube holder Test tube rack Wire gauze Lab drying rack
Containers Storage	Agar plate Cryogenic storage dewar Incubator Laminar flow cabinet Microtiter plate Petri dish Picotiter plate Refrigerator Weighing boat Weighing dish
Other items	Aspirator Autoclave Balance brush Cork borer Crucible Filter paper File Forceps Centrifuge Microscope Pipeclay triangle Spectrophotometer Splint Stopper Scoopula Spatula Test tube brush Wire brush Inoculation needle Inoculation loop

Glassware

Apparatus	Dean–Stark Soxhlet extractor Kipp's
Bottles	Boston round
Condensers	Cold finger Liebig
Dishes	Evaporating Petri Syracuse Watch glass
Flasks	Büchner Vacuum (Dewar) Erlenmeyer Fernbach Fleaker Florence Retort Round-bottom Schlenk Volumetric
Funnels	Büchner Hirsch Dropping Separatory
Measuring devices	Burette Conical measure Cuvette Eye dropper Eudiometer Graduated cylinder Ostwald viscometer Pipette
Tubes	Drying Cragie Nuclear magnetic resonance (NMR) Test Thiele Thistle
Other items	Beaker Bell jar Gas syringe Vial

Analytical chemistry

Compositional	AutoAnalyzer CHN analyzer Colorimeter Inductively coupled plasma (ICP) device Gas chromatograph (GC) Liquid chromatograph (LC) Mass spectrometer (MS) pH indicator pH meter
Microscopy	Scanning electron microscope (SEM) Transmission electron microscope (TEM)
Thermochemistry	Calorimeter differential scanning Melting-point apparatus Thermometer Thermogravimetric analyzer (TGA)
Other items	Analytical balance Colony counter Spiral plater Nuclear magnetic resonance (NMR) instrument Plate reader

Electronics

Control devices	Bench power supply Current source Voltage source Function generator Galvanostat Pulse generator Potentiostat
Measurement	Ammeter Logic analyzer Multimeter Network analyzer Oscilloscope Spectrum analyzer Time-domain reflectometer Transistor tester Voltmeter
Tools	Heat gun Soldering iron Tweezers Wire stripper
General	Alligator clip Test probe

Safety

Personal protective
equipment (PPE)

Lab coat Face shield Respirator Rubber apron Safety shower
Eye and hand	Acid-resistant gloves Eyewash station Glove box Medical gloves Nitrile gloves Safety glasses Safety goggles

Other items

Instruments used in medical laboratories

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