{
    "code": "3825",
    "title": "Instruments for Measuring and Testing of Electricity and Electrical Signals",
    "sic_manual": "OSHA SIC Manual",
    "level": "Industry",
    "major_group_code": "38",
    "parent_code": "382",
    "parent_title": "Laboratory Apparatus and Analytical, Optical, Measuring, and Controlling Instruments",
    "plain_english_definition": "",
    "summary_plain": "",
    "official_definition": "Establishments primarily engaged in manufacturing instruments for measuring the characteristics of electricity and electrical signals, such as voltmeters, ammeters, wattmeters, watt-hour meters, demand meters, and equipment for testing the electrical characteristics of electrical, radio, and communication circuits and of internal combustion engines.",
    "official_source": "https://www.osha.gov/sic-manual/3825",
    "classification_note": "",
    "included_activities": [
        "Alternator and generator testers",
        "Ammeters",
        "Ampere-hour meters",
        "Analog-to-digital converters, electronic instrumentation type",
        "Analyzers for testing electrical characteristics"
    ],
    "excluded_activities": [
        {
            "label": "Search, Detection, Navigation, Guidance, Aeronautical, and Nautical Systems and Instruments",
            "code": "3812",
            "title": "Search, Detection, Navigation, Guidance, Aeronautical, and Nautical Systems and Instruments",
            "url": "https://siccode.com/sic-code/3812/search-detection-navigation-guidance-aeronautical-nautical-systems-instruments"
        }
    ],
    "confused_codes": [],
    "official_siblings": [
        {
            "code": "3821",
            "title": "Laboratory Apparatus and Furniture",
            "url": "https://siccode.com/sic-code/3821/laboratory-apparatus-furniture",
            "label": "Industry"
        },
        {
            "code": "3822",
            "title": "Automatic Controls for Regulating Residential and Commercial Environments and Appliances",
            "url": "https://siccode.com/sic-code/3822/automatic-controls-regulating-residential-commercial-environments-appliances",
            "label": "Industry"
        },
        {
            "code": "3823",
            "title": "Industrial Instruments for Measurement, Display, and Control of Process Variables; and Related Products",
            "url": "https://siccode.com/sic-code/3823/industrial-instruments-measurement-display-control-process-variables-products",
            "label": "Industry"
        },
        {
            "code": "3824",
            "title": "Totalizing Fluid Meters and Counting Devices",
            "url": "https://siccode.com/sic-code/3824/totalizing-fluid-meters-counting-devices",
            "label": "Industry"
        },
        {
            "code": "3825",
            "title": "Instruments for Measuring and Testing of Electricity and Electrical Signals",
            "url": "https://siccode.com/sic-code/3825/instruments-measuring-testing-electricity-electrical-signals",
            "label": "Industry"
        },
        {
            "code": "3826",
            "title": "Laboratory Analytical Instruments",
            "url": "https://siccode.com/sic-code/3826/laboratory-analytical-instruments",
            "label": "Industry"
        },
        {
            "code": "3827",
            "title": "Optical Instruments and Lenses",
            "url": "https://siccode.com/sic-code/3827/optical-instruments-lenses",
            "label": "Industry"
        },
        {
            "code": "3829",
            "title": "Measuring and Controlling Devices, Not Elsewhere Classified",
            "url": "https://siccode.com/sic-code/3829/measuring-controlling-devices",
            "label": "Industry"
        }
    ],
    "official_children": [],
    "related_naics_codes": [
        {
            "code": "334514",
            "title": "Totalizing Fluid Meter and Counting Device Manufacturing ",
            "url": "https://siccode.com/naics-code/334514/totalizing-fluid-meter-counting-device-manufacturing"
        },
        {
            "code": "334515",
            "title": "Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals",
            "url": "https://siccode.com/naics-code/334515/instrument-manufacturing-measuring-testing-electricity-electrical-signals"
        }
    ],
    "example_companies": [
        {
            "name": "Keysight Technologies Inc",
            "url": "https://siccode.com/business/keysight-technologies-inc",
            "city": "Santa Rosa",
            "state": "CA",
            "reviewed": false
        },
        {
            "name": "Plantronics Inc",
            "url": "https://siccode.com/business/plantronics-inc",
            "city": "Santa Cruz",
            "state": "CA",
            "reviewed": false
        },
        {
            "name": "Sypris Solutions Inc",
            "url": "https://siccode.com/business/sypris-solutions-inc",
            "city": "Louisville",
            "state": "KY",
            "reviewed": false
        },
        {
            "name": "Brewer Science Inc",
            "url": "https://siccode.com/business/brewer-science-inc",
            "city": "Rolla",
            "state": "MO",
            "reviewed": false
        },
        {
            "name": "Balboa Water Group",
            "url": "https://siccode.com/business/balboa-water-group",
            "city": "Tustin",
            "state": "CA",
            "reviewed": false
        },
        {
            "name": "Bird Technologies Group",
            "url": "https://siccode.com/business/bird-technologies-group",
            "city": "Solon",
            "state": "OH",
            "reviewed": false
        },
        {
            "name": "Aries Industries Inc",
            "url": "https://siccode.com/business/aries-industries-inc",
            "city": "Waukesha",
            "state": "WI",
            "reviewed": false
        },
        {
            "name": "ITT Inc",
            "url": "https://siccode.com/business/itt-inc",
            "city": "West Harrison",
            "state": "NY",
            "reviewed": false
        },
        {
            "name": "Cohu Inc",
            "url": "https://siccode.com/business/cohu-inc",
            "city": "Poway",
            "state": "CA",
            "reviewed": false
        },
        {
            "name": "inTEST Corp",
            "url": "https://siccode.com/business/intest-corp",
            "city": "Mount Laurel",
            "state": "NJ",
            "reviewed": false
        },
        {
            "name": "A E H R Test Systems",
            "url": "https://siccode.com/business/a-e-h-r-test-systems",
            "city": "Fremont",
            "state": "CA",
            "reviewed": false
        }
    ],
    "company_count": 436,
    "email_contact_count": 292,
    "phone_count": 382,
    "website_count": 461,
    "database_as_of": "Nov 13, 2026",
    "count_type": "commercial",
    "count_disclaimer": "These are SICCODE.com commercial database counts, not official government establishment totals. Website-Reviewed & Enriched is a separate review of company websites for products, services, markets, and fit.",
    "canonical_url": "https://siccode.com/sic-code/3825/instruments-measuring-testing-electricity-electrical-signals",
    "json_url": "https://siccode.com/sic-code/3825.json",
    "reviewed_by": "Industry Classification Review Team",
    "last_updated": "October 2026"
}