FSG 66 Instruments and Laboratory
Equipment

6605 Navigational Instruments
Includes Azimuths; Sextants; Octants; Compasses; Plotting Boards; Underwater Log Equipment; Air Position Indicators; Drift Meters.

6610 Flight Instruments
Includes Air Speed Indicators; Rate of Climb Indicators; Bank and Turn Indicators;
PitotTubes; Gyro Horizon Indicators; Attitude Gyro Indicators.
Excludes Navigational Instruments (FSC 6605).

6615 Automatic Pilot Mechanisms and
Airborne Gyro Components
Note Included in this class are gyro components of guided missiles. Excluded are complete gyro mechanisms and nonairborne gyro components, both of which are classified in the same classes as their
next higher assemblies.
Includes Automatic Pilot Regulators; Directional,
Vertical, Bank and Turn, and
Hydraulic Surface Gyro Controls; Airborne and Shipborne Automatic Pilot
Mechanisms;Helicopter Automatic Stabilization
Equipment.
Excludes Automatic Pilot Training Devices (FSC 6930); and Automatic Pilot Mechanisms, Guided Missile (FSC 1420).

6620 Engine Instruments
Note-Instruments designed for use on both engines and other than engines are not included in this class and should be
classified in the appropriate instruments class of Group 66.
Includes All Engine Instruments, including Aircraft, Marine, and Vehicular; Fuel Pressure Gages; Manifold Pressure Gages; Oil Pressure Gages; Fuel Mixture
Indicators; Engine Oil and Fuel Warning Devices.

6625 Electrical and Electronic Properties Measuring and Testing Instruments
Note-This class includes all ″basic″ types of electrical and electronic test instruments,
such as ammeters, voltmeters,
ohmmeters,multimeters, and similar instruments, even if specially designed.
Excluded from this class by the modifier ″except specially designed″ are test instruments,
other than ″basic″ instruments,
which are specially designed for
use with atomic ordnance, fire control, guided missile, motor vehicle, aircraft, or
photographic equipment. Such specially designed test instruments are to be classified in other classes in the Federal Sup-46 ply Classification. This class includes communications test equipment, infrared test equipment designed for communication, and night vision maintenance and
test specialized equipment.
Includes Test Leads and Test Lead Attachments; Test instruments designed for communication equipment; Test instruments
designed for use with electronic
equipment classified in two or more FSC groups.
Excludes Radiac Equipment

6636 Environmental Chambers and Related Equipment Note This class includes only those
environmental chambers used exclusively to perform controlled tests, under
simulated conditions, to determine physical
damage and/or changes in operating characteristics for equipments and components
such as Humidity; Immersion;
Moisture; Altitude; Explosion; Thermal Shock; Sand and Dust; Flammability; Seal. Environmental chambers included in this class provide data regarding service
life and behavior of various items equivalent to actual service conditions existing in the field.
Includes Chambers; Wind Tunnels; Enclosures specifically designed to simulate an environmental condition; Weatherometers; Fadeometers; Specially designed equipment and components exclusively
related to environmental chambers.
Excludes General purpose prefabricated buildings, chambers, panels, and components (FSC 5410); Controlled Environmental
Conditioning Kits and Sets (FSC
4240); Baths (FSC 4510); Ovens (FSC
7310); Kilns (FSC 3630); Radiosonde
Baseline Check Sets (FSC 6660); Divers Recompression Chambers (FSC 4220); Altitude Training Decompression Chambers
(FSC 6930); and Chambers used as
training devices (FSC 6930); Checkout and Test Equipment (FSC 6625); Chemical Analysis Instruments (FSC 6630);
Electrical and Electronic Properties Measuring and Testing Instruments (FSC
6625); and Meteorological Instruments (FSC 6660).

6630 Chemical Analysis Instruments
Includes Acidity (pH) Meters; Gas Analyzers; Alakalinity Measuring Instruments;
Colorimeters.
Excludes Gas Detecting Equipment; Manual Gas Alarms; Chemicals; In Vitro Diagnostic Substances and Reagents.

6635 Physical Properties Testing and Inspection. Includes Destructive and Nondestructive
Inspection Equipment such as Fluorescent Penetrant Inspection Units; Magnetic
Inspection Units; Industrial X-Ray Machines; Industrial X-Ray Film; Tensiometers;
Material Hardness Testers.
Excludes General prupose Measuring Tools (FSC 5210) and Precision Measuring Tools and Inspection Gages (FSC
5220).

6640 Laboratory Equipment and Supplies
Includes Laboratory Glassware; Laboratory Funnels; Laboratory Furnaces; Glass Beads; Laboratory White Sand; Litmus
Paper; Paper Filters; Insect Transfixion Pins; Laboratory GlassWool; Laboratory
Furniture, except Dental Laboratory. Excludes Instruments covered by other
classes in group 66; Dental Laboratory Equipment; Laboratory Scales and Balances;
In Vitro Diagnostic Substances
and Reagents.

6645 Time Measuring Instruments
Includes Clocks; Job Recording Devices; Time Recorders; Time Stamps, Watch and Clock Movements;Watches.

6650 Optical Instruments, Test Equipment,
Components and Accessories
Includes Binoculars; Magnifiers; Microscopes;
Periscopes; Telescopes; Optical
Elements; such as Lens, Prisms, Windows;
Optical Benches and Associated
Devices; Endoscopes, Fiber Optics (Non-
Medical).
Excludes Fire Control Instruments, Optical;
Surveying Instruments, Optical; Photogrammetric
Instruments; Octants; and
Sextants; Optical Instruments Integrated
with Fire Control Equipment; Opthalmological
Instruments; Electronic Fiber Optic
Test Equipment; Medical Endoscopes.

6655 Geophysical Instruments
Includes Geodetic, Oceanographic and
Seismographic Instruments.
Excludes Telescopes.

6660 Meteorological Instruments and
Apparatus
Includes Meteorological Ballons; Radiosonde
Sets; Radarsonde Sets.

6665 Hazard-Detecting Instruments and
Apparatus
Includes Radiac Equipment; Gas Detecting
Equipment; Land Mine Detecting
Equipment.
Excludes Manual Gas Alarms (FSC
6350).

6670 Scales and Balances
Includes Coin Operated, Household, Industrial,
Postal, and Laboratory Scales
and Balances.

6675 Drafting, Surveying, and Mapping
Instruments
Includes Drawing Instruments, Drafting
Tools; Engineering and Architectural
Scales; Levels; Transits; Photogrammetric
Instruments; Astrolabes; Level Rods;
Plane Tables; Surveying Altimeters; Theodolites.
Excludes Surveyors’ Tapes.

6680 Liquid and Gas Flow, Liquid Level, and
Mechanical Motion Measuring
Instruments
Includes Liquid Level Float Instruments;
Revolution Counters; Speedometers; Rotation
Measuring Instruments and Apparatus;
Oxygen Flow Indicators; Tachometers,
including Engine Tachometers.
Excludes Combination Instruments;
(FSC 6695); Meteorological Instruments
(FSC 6660); and Automatic Control
Valves (FSG 48).

6685 Pressure, Temperature, and Humidity
Measuring and Controlling Instruments
Includes Thermometers, including Engine
Thermometers; Pressure Gages;
Thermocouple Leads; Resistance Bulbs.
Excludes Clinical Therometers; (FSC
6515); Thermostatic and Differential
Pressure Switches (FSC 5930); and Meteorological
Instruments (FSC 6660).

6695 Combination and Miscellaneous
Instruments
Includes Flow-Pressure Instruments;
Taximeters; Dynamometers.
Excludes Dental, Medical, Surgical, and
Veterinary Instruments.