Instrument Manufacturing Workers Compensation (class code: 3681) Insurance

What is Instrument Manufacturing Workers Compensation (class code: 3681)?

Instrument Manufacturing Workers Compensation Insurance (class code 3681) is a specialized form of workers’ compensation coverage designed for businesses involved in producing precision instruments and devices. This includes manufacturers of medical equipment, scientific instruments, control systems, and similar products. The policy helps protect both employers and employees in case of work-related injuries or illnesses.

Who needs it

Any business involved in the manufacturing of instruments, including but not limited to:

  • Medical device manufacturers
  • Scientific and laboratory instrument producers
  • Electrical and electronic measuring tool manufacturers
  • Control system and sensor manufacturers

If your business employs workers in this industry, most states require you to carry workers’ compensation insurance to stay compliant and protect your workforce.

What it typically covers

Workers compensation insurance generally provides coverage for:

  • Medical expenses for work-related injuries or illnesses
  • Lost wages if an employee is unable to work due to injury
  • Rehabilitation and recovery services
  • Disability benefits (temporary or permanent)
  • Death benefits to dependents if an employee dies due to a work-related incident

Common exclusions and limitations

While workers compensation offers broad protection, it does not cover:

  • Injuries that occur outside of work
  • Self-inflicted injuries
  • Injuries from intoxication or drug use on the job
  • Violations of company policies or unlawful activities

Always review your policy carefully to understand specific exclusions that may apply to your coverage.

Factors that influence cost

Several factors can affect the cost of workers compensation insurance for instrument manufacturing businesses:

  • Number of employees and total payroll
  • Workplace safety practices and claims history
  • State laws and classification codes
  • Experience modification rate (EMR)

Maintaining a safe work environment and training employees can help reduce your premiums over time.

Proof of insurance and compliance

Many states require proof of workers compensation coverage when applying for business licenses or bidding on contracts. Certificate of Insurance (COI) documents serve as official proof and are typically provided by your insurer. Requirements vary by state, so it’s important to verify what’s needed in your location.

How to get a quote

Getting coverage tailored to your instrument manufacturing business is easy. Start by requesting a quote to explore your options and ensure your company meets state requirements.

Frequently Asked Questions

What is class code 3681 in workers compensation insurance?

Class code 3681 refers to businesses involved in manufacturing precision instruments, such as medical or scientific devices, and is used to classify risk and determine insurance rates.

Do I need workers compensation if I have only a few employees?

Most states require workers compensation insurance even for small teams. Check your state's laws to determine if you're required to carry coverage.

What happens if I don’t carry workers compensation insurance?

Operating without required coverage can lead to fines, penalties, and potential lawsuits if an employee is injured on the job.

Does workers compensation cover repetitive strain injuries?

Yes, if the injury is work-related, such as repetitive motion injuries from assembly work, it’s typically covered under workers compensation.

How can I lower my workers compensation costs?

Implementing workplace safety programs, regular training, and keeping a clean claims record can help reduce your workers comp premiums.

Still have questions? Talk to a local insurance expert.

Partners, Programs & Market Access


We maintain relationships with nationally recognized and specialty-focused insurance providers that actively underwrite this class of business. Our network includes both admitted and non-admitted markets, allowing us to match risks—from straightforward accounts to more complex or hard-to-place exposures—with appropriate underwriting partners.


Program availability, coverage terms, and underwriting appetite can vary based on operations, location, and loss history, so access to multiple markets is key to securing the right fit. This approach helps ensure broader coverage options and more competitive placement across a range of risk profiles.



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