Aquatic Life Ltd.
- Seller of a comprehensive selection of environmental sampling and monitoring apparatus. Winnipeg, Canada, or buy online.
- http://www.aquaticlife.ca/

Scientific Instruments, Inc
- Manufacturer of hydrologic instrumentation used for stream gaging and sediment and water quality studies. Also supply optical and electronic surveying instruments for use in land surveying, geodetic, GIS, and construction fields.
- http://www.scientif.com/

Optek-Danulat, Inc.,
- Manufacturer of turbidity meters, colorimeters, and suspended solids monitors for in-line process control measuring of liquids and gasses.
- http://www.optek.com/

Environmental Testing and Research Laboratories
- Includes information on testing services.
- http://www.etrlabs.com/

Kerfoot Technologies
- Manufactures and sells remediation, monitoring and sampling equipment for groundwater and soils.
- http://www.kva-equipment.com

GeoPump, Inc.
- Low-flow and micro-flow pumping devices for ground water monitoring. Also offers well-logging systems and pumps for use in remediation projects. Descriptions of product lines.
- http://www.geopump.com/

McNab Water Monitoring Systems
- Instruments to measure conductivity, salinity, and pH.
- http://www.themcnab.com/water_monitoring_system.htm

Geoscientific Ltd.
- Distributor of environmental monitoring instruments and global positioning systems.
- http://www.geoscientific.com/

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.
- http://www.aquatrak.com/

Partech Instruments LTD
- Offers water measurement instruments for suspended solids, turbidity, sludge blanket levels, dissolved oxygen, chemical analysers, and level transmitters.
- http://www.partech.co.uk/

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.
- http://www.clearview-bailer.com

Durham Geo Enterprises
- Manufacturers storm water samplers and groundwater remediation pumps.
- http://www.durhamgeo.com

In-Situ, Inc.
- Supplies water level and water quality instrumentation for hydrologic monitoring equipment and field data logging of water level and quality.
- http://www.in-situ.com/

Stevens Water Monitoring Systems Inc.
- Manufacture of water level sensors, water quality sensors, soil moisture sensors, water flow measurement, and basic weather monitoring sensors.
- http://www.stevenswater.com/

Van Essen Instruments
- Offers water monitoring products including ground water, rain water, and sewage system overflow sensors.
- http://www.vanessen.com

Hf Scientific Inc.
- Turbidimeter manufacturer making instruments for the waste and drinking water plants.
- http://www.hfscientific.com/

Advanced Polymer Systems Inc.
- Water and turbidity standards, turbidimeters and spectrophotomers, scientific instruments for the waste and drinking water plants.
- http://www.apsstd.com

CheckLight Ltd.
- Developes quality control bioassays to monitor various parameters of water quality including toxicity screening, biocide activity, BOD, and bacterial regrowth potential (AOC).
- http://www.checklight.co.il

Manning Environmental Inc.
- Manufacturer of fluid samplers and associated equipment. Builds both peristaltic and vacuum samplers, and accessories.
- http://www.manning-enviro.com/

Turbidimeter.net
- Turbidimeters, turbidity standards, and other water related testing equipment. Spectrum analysis and colorimeters.
- http://www.turbidimeter.net

Eureka Environmental Engineering
- Manufacturer of multiparameter instruments which monitor water quality, including dissolved oxygen, specific conductance, pH, ORP, and stage levels.
- http://www.eurekaenvironmental.com

SIBAK Industries
- Manufacturer of unique sampling tools, particularly for sampling contaminated groundwater without introducing turbidity, causing volatilization, or requiring wells to be purged.
- http://www.sibak.com

Bennett Sample Pumps, Inc.
- Description, technical specifications, pricing and contact information for Bennett sample pump, reels and tube bundles, used for groundwater sampling.
- http://www.bennettsamplepump.com/

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.
- http://www.inwusa.com/

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.
- http://www.waterrauk.com/

Robin Instruments Ltd.
- Suppliers of instumentation for water analysis, both portable and Process (On-line).
- http://www.robin-instruments.co.uk/

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.
- http://www.arjayeng.com/

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.
- http://www.teledevices.com

Aqua Bailers, Inc.
- Manufacturers of high-quality bailers and other ground water and well sampling equipment. Online catalog and ordering information.
- http://www.aquabailers.com

QED Environmental Systems
- Supplier of pumping systems and equipment for groundwater sampling and remediation.
- http://www.qedenv.com

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
- http://www.westbay.com/

GeoInsight
- Makers direct push water sampler, small-diameter well devices, and other groundwater sampling and monitoring apparatus.
- http://www.geoinsightonline.com

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.
- http://www.sunburstsensors.com/

Croft Instrument Systems
- Supplies instruments 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.
- http://www.croftinst.com/home.htm

Topac Conductivity Meters and Probes
- Instruments for measuring conductivity, salinity, dissolved oxygen, pH and temperature.
- http://www.topac.com/conductivity_directory.html

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.
- http://www.gurley.com/GPIhydro/

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 pi
- http://www.solinst.com

Bright Dyes Dye Tracing Products
- Fluorescent dye tracing products for use in groundwater flow tracing, leak detection, septic and sewer inspections and similar applications.
- http://www.brightdyes.com

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.
- http://www.esica.com

HydroWatch
- Remote water monitoring equipment for unattended monitoring of water depths, flow rates, water temperatures and precipitation.
- http://www.hydrowatch.com

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.
- http://www.globalw.com/

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.
- http://www.dteccorp.com/

YSI
- Designs, manufactures and distributes water quality and environmental monitoring equipment, temperature probes, temperature measurement equipment, thermistors, CO2 sensors, glucose analyzers, and lactate analyzers.
- http://www.ysi.com

Heron Instruments
- Manufactures and sells portable groundwater monitoring instrumentation, including water level and oil/water interface meters.
- http://www.heroninstruments.com

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.
- http://www.hydrolab.com/

Marschalk Corporation
- Manufacturer of System 1 ground water sampling products for low flow, and pneumatic pumping systems for remediation - since 1978
- http://www.marschalk.com

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.
- http://www.biospherical.com/

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.
- http://www.phmeters.com

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.
- http://environmentalplug.com/

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.
- http://www.advmnc.com

Turner Designs
- A comprehensive site of fluorometers, luminometers, and oil in water monitors used in environmental, biotechnology, and industrial applications.
- http://www.turnerdesigns.com

HD Supply Inc.
- Supplies Hester Dendy multiple plate benthic invertebrate samplers direct from the manufacturer.
- http://www.hdsupply.com

Manufacturer of Water Quality Measuring Instruments
- Water Quality Measuring Instruments such as pH meters, ORP meters, TDS/Conductivity meters, dissolved oxygen meters.
- http://www.eutechinst.com

Rickly Hydrological Company
- Online catalog of Rickly Hydrological Company, manufacturer of USGS Stream Gaging, Sediment Sampling, and Stage Measurement instrumentation equipment.
- http://www.rickly.com

American Sigma, Inc.
- Manufacturer of open channel flow meters, water quality monitors, wastewater samplers and sewer system management software.
- http://www.americansigma.com

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.
- http://www.southerndatastream.com