Rapid Bioassay Methods

Ground Truthing Instrumentation

Zooplankton Sampling

Ichthyoplankton Sampling

Waste Water Remediation

USEPA Superfund Sites

Shellfish Health

Wetland Surveys

Paleoseismic Reconstructions

Undisturbed Samples


  • Superior quality, best price
  • 100% handmade in USA with domestic raw materials
  • Super-duty construction
  • Ultra-clean materials
  • Optimized designs, many with only one moving part
  • Dependable, reliable service
  • Excellent warrantees
  • 100% mechanically operated instruments


  • Established in 1988
  • Customers in all 50 states
  • Servicing 100+ countries
  • Connected with 300+ universities
  • Our biggest customer: USGS
  • Serving all Federal & State Natural Resource Agencies

in US & Canada

Custom Orders please Request a Quote.


  • Built on solid customer relations
  • Products optimized from customer input & critique
  • We love to talk to our customers about product design, development, use, & site conditions

Request a DISCOUNT CODE for quantity or educational orders

Current delivery time is approximately 2 weeks

Water Samplers

Water Samplers
Water Samplers manufactured by Aquatic Research Instruments are capable of collecting clean and discrete water samples in many marine and limnological settings.

Plankton Samplers

Plankton Samplers
Aquatic Research Instruments is a sole provider of several specialized Plankton Samplers that are used to: create microcosms, capture evasive organisms, and passively collect animals in “hard to sample” aquatic environments.

Laboratory Equipment

Laboratory Equipment
ARI supplies a line of Laboratory Equipment that enables one to split, elutriate, settle, and count raw field samples collected with our Water, Sediment and Plankton Samplers.