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.

American Sigma, Inc.
Manufacturer of open channel flow meters, water quality monitors, wastewater samplers and sewer system management software.

Hach Co.
Reagents and instrumentation for water testing and water quality analysis, including portable systems (test strips, test kits, portable labs), laboratory instruments (spectrophotometers, colorimeters, turbidimeters), and process analyzers (turbidity, particle count, hardness, alkalinity, chlorine, pH/ORP, ammonium, nitrates, silica, and others).

Rickly Hydrological Company
Online catalog of Rickly Hydrological Company, manufacturer of USGS Stream Gaging, Sediment Sampling, and Stage Measurement instrumentation equipment.

Manufacturer of Water Quality Measuring Instruments
Water Quality Measuring Instruments such as pH meters, ORP meters, TDS/Conductivity meters, dissolved oxygen meters.

Sensorex
Quality ORP (REDOX) electrodes and other specialty sensors for pH, Conductivity and dissolved O2. For portable, laboratory and industrial process applications.

HD Supply Inc.
Supplies Hester Dendy multiple plate benthic invertebrate samplers direct from the manufacturer.

Turner Designs
A comprehensive site of fluorometers, luminometers, and oil in water monitors used in environmental, biotechnology, and industrial applications.

Advanced Measurements and Controls, Inc.
Providing environmental monitoring equipment for water quality, hydrology, stream gaging, stage, and meteorology. Includes sensors, dataloggers, sediment sampling devices, current meters, and fish tags.

Environmental Plug
Markets torque locking well plugs for groundwater environmental monitoring applications. Bright colour, large ID lettering, liquid tight, easy to use, low cost and developed by Geologists.

IQ Scientific Instruments
State-of-the-art non-glass pH systems with ISFET silicon-chip sensor technology. A full line of non-glass pH meter and probe are displayed.

McNab Water Monitoring Systems
Instruments to measure conductivity, salinity, and pH.

Biospherical Instruments Inc.
A research-oriented company that designs and manufactures state-of-the-art submersible and ground-based optical instruments for monitoring reservoir water quality.

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

Hydrolab
Multiprobes and displays for surveys, profiling, remote, unattended monitoring of any array of water quality parameters in fresh, salt, ground, waste waters to 200 meters.

Heron Instruments
Manufactures and sells portable groundwater monitoring instrumentation, including water level and oil/water interface meters.

YSI
Designs, manufactures and distributes water quality and environmental monitoring equipment, temperature probes, temperature measurement equipment, thermistors, CO2 sensors, glucose analyzers, and lactate analyzers.

D-Tec Corporation
Design and manufacture of storm water samplers. Simple and reliable solution for remote monitoring applications. Collection within the first thirty minuntes of flow.

Global Water Instrumentation, Inc.
Manufactures and markets water level loggers and sensors, velocity meters, flow meters, water quality sensors, samplers, data recorders, meteorological instruments, and related devices.

HydroWatch
Remote water monitoring equipment for unattended monitoring of water depths, flow rates, water temperatures and precipitation.

ESI Environmental Sensors Inc.
Specializes in the design, manufacture and distribution of instrumentation and systems for moisture monitoring sensors and systems for landfill closure, agriculture, civil engineering and oil/gas applications.

Bright Dyes Dye Tracing Products
Fluorescent dye tracing products for use in groundwater flow tracing, leak detection, septic and sewer inspections and similar applications.

Solinst Groundwater Instruments
Manufactures high quality hydrogeological and hydrological instrumentation. Groundwater monitoring instruments include water level indicators, level and water quality data loggers, groundwater samplers, oil/water interface probes, drive-point piezometers and complete monitoring systems, including multilevel systems.

HydroTechnics, Inc.
Technical information and case histories for the VECTOR: an in-situ ground water velocity sensor and software system capable of remotely monitoring changes in the flow vector.

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.

Topac Conductivity Meters and Probes
Instruments for measuring conductivity, salinity, dissolved oxygen, pH and temperature.

Croft Instrument Systems
Supplies instrments for the pulp and paper industry, including optical consistency transmitters, suspended solids meters, turbidity meters, and color intensity meters for paper pulp, wastewater, effluent and sludge filtrate measurement.

Sunburst Sensors, LLC
Manufactures autonomous optical chemical sensors for in situ monitoring of carbon dioxide, pH and other chemical properties in ocean and fresh water.

GeoInsight
Makers direct push water sampler, small-diameter well devices, and other groundwater sampling and monitoring apparatus.

Westbay Instruments Incorporated
Designs and manufactures a multi-level instrumentation system for investigating and monitoring groundwater conditions, allowing the monitoring of multiple zones in a single borehole. Includes extensive technical information about field applications of the system.

Environmentalpumps.com
Rents, sell and services submersible pumps and related equipment for the environmental and water supply industries. Division of SAIC.

Aquatic Life Ltd.
Seller of a comprehensive selection of environmental sampling and monitoring apparatus. Winnipeg, Canada, or buy online.

QED Environmental Systems
Supplier of pumping systems and equipment for groundwater sampling and remediation.

Aqua Bailers, Inc.
Manufacturers of high-quality bailers and other ground water and well sampling equipment. Online catalog and ordering information.

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.

Arjay Engineering Ltd
Manufacturers of level monitors and controls, ppm oil in water monitors, leak detection and alarms, open channel flow monitors and gas detection systems.

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

Waterra UK Limited
UK based company manufacturing and selling a range of groundwater monitoring and sampling equipment for use in groundwater investigation, remediation and monitoring programmes.

Instrumentation Northwest, Inc.
Manufactures, sells, and rents water resource tools and environmental monitoring products, including water quality sensors, dataloggers, level sensors, submersible pumps and multi-parameter meters.

Bennett Sample Pumps, Inc.
Description, technical specifications, pricing and contact information for Bennett sample pump, reels and tube bundles, used for groundwater sampling.

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

Eureka Environmental Engineering
Manufacturer of multiparameter instruments which monitor water quality, including dissolved oxygen, specific conductance, pH, ORP, and stage levels.

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

Manning Environmental Inc.
Manufacturer of fluid samplers and associated equipment. Builds both peristaltic and vacuum samplers, and accessories.

CheckLight Ltd.
Developes quality control bioassays to monitor various parameters of water quality including toxicity screening, biocide activity, BOD, and bacterial regrowth potential (AOC).

Advanced Polymer Systems Inc.
Water and turbidity standards, turbidimeters and spectrophotomers, scientific instruments for the waste and drinking water plants.

Hf Scientific Inc.
Turbidimeter manufacturer making instruments for the waste and drinking water plants.

Van Essen Instruments
Offers water monitoring products including ground water, rain water, and sewage system overflow sensors.

Stevens Water Monitoring Systems Inc.
Manufacture of water level sensors, water quality sensors, soil moisture sensors, water flow measurement, and basic weather monitoring sensors.

In-Situ, Inc.
Supplies water level and water quality instrumentation for hydrologic monitoring equipment and field data logging of water level and quality.

Durham Geo Enterprises
Manufacturers storm water samplers and groundwater remediation pumps.

Environmental Service Products, Inc.
Manufacturer of medical grade PVC bailers, direct push liners, and drum thiefs. Website offers more groundwater products including HDPE and teflon bailers, descriptions, and ordering information.

Genesis Alert Systems
Offers monitoring systems to detect early indications of oil spills, bio-terror, hazardous waste and algae blooms.

Partech Instruments LTD
Offers water measurement instruments for suspended solids, turbidity, sludge blanket levels, dissolved oxygen, chemical analysers, and level transmitters.

Aquatrak Corporation
Manufacturer of liquid level determination for measuring tides, sea state, river stages, ground water, head and tail water, and tank ullage. Proven technology characterized by accuracy (±3 mm), reliability, versatility, and durability.

Geoscientific Ltd.
Distributor of environmental monitoring instruments and global positioning systems.