Gurley Precision Instruments

Manufacturers of hydrological current meters and accessories for open channels, rivers and streams. Products include Price and pygmy meters, digital indicators and headphone sets, support systems, including cranes and sounding reels.

Marschalk Corporation

Manufacturer of System 1 ground water sampling products for low flow, and pneumatic pumping systems for remediation - since 1978

Optek-Danulat, Inc.,

Manufacturer of turbidity meters, colorimeters, and suspended solids monitors for in-line process control measuring of liquids and gasses.

QED Environmental Systems

Supplier of pumping systems and equipment for groundwater sampling and remediation.

Robin Instruments Ltd.

Suppliers of instumentation for water analysis, both portable and Process (On-line).

SIBAK Industries

Manufacturer of unique sampling tools, particularly for sampling contaminated groundwater without introducing turbidity, causing volatilization, or requiring wells to be purged.

Southern DataStream

Specializes in monitoring equipment, data collection and analysis for agricultural engineering, water management, and water quality. Products include stage loggers, stilling wells, and data collection units.

Stormwater Online

Resource for stormwater managers to order sampling kits, lab analysis, and other supplies. Includes system for tracking and reminders, with contacts in Los Alamitos, California.

TeleDevices LLC

Offers automatic samplers, telemetry, SDADA systems, flow meters and other products for remote monitoring of rainfall, stormwater, and other hydrologic parameters. Includes specifications and online manual.

Turbidimeter.net

Turbidimeters, turbidity standards, and other water related testing equipment. Spectrum analysis and colorimeters.