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Dissolved Oxygen Meter

China's Seven Major Rivers Heavily Polluted Drinking Water, 89% Failed

Water is the source of life, but with the geometric growth of our population, the chaos of modern industrial wastewater emission misplacing, urban waste, pesticide spraying, etc. in rural areas, causing severe river pollution, already a few fresh water resources exacerbate the shortage can not be used by man. According to statistics, more than 1000 kinds of water pollution has reached 2 (2221) mainly for organic chemicals, carbide, metal objects, of which there are 765 kinds of water (190 species on human health, and 20 kinds of cancer, 23 kinds of suspect cancer , 18 kinds of tumor promoters, 56 kinds of mutation: Tumor). In China, only less than 11% of the people in line with our health standards for drinking water, while up to 65% of people drinking muddy, bitter alkaline, fluoride, arsenic, industrial pollution, infectious diseases, water. 200 million people drink tap water, 7,000 million people drink high fluoride water, 3000 million people drink water with high nitrate, high-fluoride drinking water, 5,000 million people, 1.1 billion people drink water with high hardness.

Hai Hai: the first of the seven major river pollution

Status: Haihe River Basin in northern China, including two major river systems Hai and Luan River. Haihe river system mainly by Zhang Wei River, Ziya River, Daqing River, Yongding River, Chaobai, North Canal, until the composition Jiyun, including steep Hai River, MA cheek River drainage channel until the plain; Luan river system, including Jidong Zhu River.

Under the "National Environment Quality Report "(1993) results, the Haihe River main pollutant is ammonia nitrogen, followed by permanganate index and biochemical oxygen demand, also Oil Type of pollution is very serious, increasingly seen as major pollutants. Present serious pollution of Haihe River, worse than Grade more than 50%. Cangzhou major pollution reaches the Ziya River and South Canal, the canal north of Beijing, Zhangjiakou and Tianjin Haihe of Yang.

Reasons: most of the Haihe River Basin, including Hebei province, northeastern Shanxi, Shandong Province, north of the small area in Inner Mongolia and Beijing and Tianjin, with a total area of 319,000 km 2. Average annual runoff for the 29.18 billion m, concentrated in the 7 to 10 months (about 70%), the national average per capita quantity of water is 10.5%, which is the national contradiction between water supply and demand the most prominent areas.

Haihe River as the constant increase in the use of surface water, river Discharge for the sharp drop, coupled with increased urban and industrial sewage, polluted the river average diameter ratio as high as 0.12. Many river Water pollution Serious.

Liaohe: Liaohe River water quality in general poor, worse than Grade 40.6%

Pollution reasons: First, the extensive mode of economic growth adversely affected. Liao River Basin has long formed the coal, oil, Steel And other heavy industry dominated the industrial structure, resource development strength, low efficiency, pollution emission and high strength.

Second, the low level of pollution control of industrial pollution sources. Industrial waste water basin total about 1 / 3, showing a growing trend. Paper, Chemical industry , Metallurgy, food, pharmaceutical and other polluting industries, some businesses obsolete equipment, backward technology, pollution control facilities in the event of default and more wastewater treatment facilities, inadequate, difficult to achieve a stable discharge standard.

Third Municipal Wastewater Treatment Low efficiency. As of the end of 2005, the Liaohe River Basin into 19 urban sewage treatment plants, processing 2.42 million tons / day, but the actual capacity is only about 50%, part of the sewage treatment plant after completion of a long-term can not function properly.

Fourth, the environment are not adequately regulated. Liao River Basin environmental monitoring, early warning, emergency response and environmental law enforcement capacity is weak in some areas failed to observe the phenomenon is more prominent lax enforcement of environmental law is not enough punishment, corporate waste-water treatment, excessive discharge, total discharge of the phenomenon can not be super-effective containment.

Songhua River Songhua River: flowing through the commodity grain base in the "toxic water"

Source of Songhua River Nen River North, South source Second Songhua River drainage area of 55.68 million square meters, multi-year surface runoff 73.47 billion cubic meters, is an important industrial base and commodity grain production bases. However, with the growing population and rapid development of industrial and agricultural production, Nen, the second Songhua River, the water quality of Songhua River are subject to different levels of pollution. Excessive pollution is the main project of ammonia, nitrogen, permanganate index, volatile phenol, BOD and dissolved oxygen, which is due to the discharge of urban waste water and more serious water shortages within the basin.

2005 11 months, CNPC Jilin Petrochemical Company in Jilin explosion, the explosion of plant only a few hundred meters from the Songhua River after the blast, about 100 tons of benzene substances (benzene, nitrobenzene, etc.) into the Songhua River, causing serious pollution of the river, along the millions of residents are affected.
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VWR Adapter, 115V for Dissolved Oxygen Meter $46.99 VWR Adapter, 115V for Dissolved Oxygen Meter

Portable Dissolved Oxygen Meter $199.99 Not only are fish, corals and invertebrates utilizing oxygen in your tank, nitrifying bacteria in your biological filter are also using O 2 Are you providing enough oxygen to satisfy both these needs? Test your water for dissolved oxygen with Milwaukee's Dissolved O 2 meter. An O 2 meter will deliver a precise and accurate electronic measurement of the oxygen content currently in your tank, so you can take action The Milwaukee O 2 meter reads form 0-19.9 ppm. Accurate to + 1.5%, you can trust the digital reading from this system Test your O 2 often, levels can fluctuate daily, due to many different circumstances within your tank's bio-system.

VWR Dissolved Oxygen Meter, Dual Display $512 VWR Dissolved Oxygen Meter Traceable. Dual Display. Meter Includes: Meter is supplied with probe with 1m (40") cable, five membranes, electrolyte solution, serial computer output, and 9V alkaline battery. Data acquisition system includes a 31/2" diskette and 0.9m (3') cable with D9F plug. Product Features: Meter simultaneously displays oxygen concentration and temperature on 13/8" digital readout. Recalls highest, lowest, and average readings with the touch of a button. A data hold button freezes the display to capture readings. Serial RS-232 output allows meter to be connected to a computer or data logger for monitoring and keeping results. PC-compatible data acquisition system (61161-386) captures, displays, and stores readings. Information can be imported into databases. A serial numbered certificate is provided from an ISO 17025 calibration laboratory to indicate instrument traceability to standards provided by the National Institute of Standards and Technology. Specifications: Temperature Range: 0 to 60°C (32 to 140°F). Temperature Accuracy: ±0.8°C (1.5°F). Resolution: 0.1°, 0.1 mg/L, 0.1%. Temperature Compensation: Automatic/0 to 60°C . Salinity Compensation: 0—39%. Dimensions: 17.8H x 7.62W x 3.2D cm (7 x 3 x 11/4"). Weight: 269 g (9.5 oz.).

Milwaukee International MINMW600 Milwaukee MW600 Dissolved Oxygen Meter $259.68 The MW600 is a compact Portable3 Dissolved Oxygen meter with Faster Micro Processor. This handy and ergonomically disigned portable meter is ideal for anyone working on a low budget and still required fast and reliable measurements. This portable meter measures Dissolved Oxygen with a Polarographicprobe and is suitable for a wide range of applications such as Educational and Aquaculture as well as water and environmental analysis. The MW600 calibrates easily in 2 points (at 100 percent saturated air and in 0 oxygen solution) and has Automatic Temperature Compensation which guarantees the highest accuracy. Other features include smaller ergonomic and lighter case design 100 percent larger and easier to read LED Display low battery warning easy to replace and screwon cap membranes and long battery life. MW600 is supplied complete with a MA840 D.O. polarographic probe with 3m cable calibration screwdriver 2 spare membranes MA9071s (30mL) electrolyte solution battery and instructions.

VWR SympHony Dissolved Oxygen Meter, SB70D Benchtop Meter Only $1159 VWR sympHony Dissolved Oxygen Meters Simple 3-Button Operation. Bright LCD Display with Ready Indicator. Automatic Barometric Pressure Compensation. Auto-Read and Auto-Hold Functions. VWR Three-Year Limited Warranty. Ideally suited for water laboratories as well as general lab use, these dissolved oxygen meters offer easy operation and a clear, intuitive user interface. Meters display dissolved oxygen (DO) concentration and percent DO saturation. A unique feature allows calibration to Winkler Titration, which improves accuracy by directly measuring oxygen concentration. Enhanced stability indicators, salinity correction, and automatic barometric pressure compensation simplify the measurement process for non-technical users. Up to 10 setup parameters and calibrations may be stored and password-protected, making them ideal for multiple users. Additional methods, as well as software updates, are available for download. Meters feature a fixed polarographic probe, waterproof mini-DIN locking DO probe connectors, advanced self-tests on meter operation with self-diagnostics, and 200-point data logging. Data can be downloaded to printer or computer via the RS-232 connection. Benchtop meters meet IP54 specifications for protection from water and are compatible with an optional USB interface cable. These meters are CE marked, CSA certified, and UL listed. The waterproof handheld meters meet IP67 specifications. Handheld meters also feature an extended-life battery for up to 2000 hours of uninterrupted operation. Product Specifications: Concentration Range: 0.00 to 90.00 mg/L . Concentration Resolution: 0.0, 0.00 . Concentration Accuracy: ±0.2 mg/L . Saturation Range: 0.0 to 600%. Saturation Resolution: 0, 0.0. Saturation Accuracy: ±2%. Salinity Range: 0 to 45 ppt. Barometric Pressure: 450 to 850 mm Hg. Temperature: Range: —5 to 105°C (23 to 221°F). Resolution: 0.1 up to 99.9°C, 1.0. Relative Accuracy: ±0.1°C.

VWR SympHony Dissolved Oxygen Meter, SP70D Handheld Meter Only $599 VWR sympHony Dissolved Oxygen Meters Simple 3-Button Operation. Bright LCD Display with Ready Indicator. Automatic Barometric Pressure Compensation. Auto-Read and Auto-Hold Functions. VWR Three-Year Limited Warranty. Ideally suited for water laboratories as well as general lab use, these dissolved oxygen meters offer easy operation and a clear, intuitive user interface. Meters display dissolved oxygen (DO) concentration and percent DO saturation. A unique feature allows calibration to Winkler Titration, which improves accuracy by directly measuring oxygen concentration. Enhanced stability indicators, salinity correction, and automatic barometric pressure compensation simplify the measurement process for non-technical users. Up to 10 setup parameters and calibrations may be stored and password-protected, making them ideal for multiple users. Additional methods, as well as software updates, are available for download. Meters feature a fixed polarographic probe, waterproof mini-DIN locking DO probe connectors, advanced self-tests on meter operation with self-diagnostics, and 200-point data logging. Data can be downloaded to printer or computer via the RS-232 connection. Benchtop meters meet IP54 specifications for protection from water and are compatible with an optional USB interface cable. These meters are CE marked, CSA certified, and UL listed. The waterproof handheld meters meet IP67 specifications. Handheld meters also feature an extended-life battery for up to 2000 hours of uninterrupted operation. Product Specifications: Concentration Range: 0.00 to 90.00 mg/L . Concentration Resolution: 0.0, 0.00 . Concentration Accuracy: ±0.2 mg/L . Saturation Range: 0.0 to 600%. Saturation Resolution: 0, 0.0. Saturation Accuracy: ±2%. Salinity Range: 0 to 45 ppt. Barometric Pressure: 450 to 850 mm Hg. Temperature: Range: —5 to 105°C (23 to 221°F). Resolution: 0.1 up to 99.9°C, 1.0. Relative Accuracy: ±0.1°C.

VWR SympHony Dissolved Oxygen Meter, Benchtop Meter with DO Probe 11388-374 $1469 VWR sympHony Dissolved Oxygen Meters Simple 3-Button Operation. Bright LCD Display with Ready Indicator. Automatic Barometric Pressure Compensation. Auto-Read and Auto-Hold Functions. VWR Three-Year Limited Warranty. Ideally suited for water laboratories as well as general lab use, these dissolved oxygen meters offer easy operation and a clear, intuitive user interface. Meters display dissolved oxygen (DO) concentration and percent DO saturation. A unique feature allows calibration to Winkler Titration, which improves accuracy by directly measuring oxygen concentration. Enhanced stability indicators, salinity correction, and automatic barometric pressure compensation simplify the measurement process for non-technical users. Up to 10 setup parameters and calibrations may be stored and password-protected, making them ideal for multiple users. Additional methods, as well as software updates, are available for download. Meters feature a fixed polarographic probe, waterproof mini-DIN locking DO probe connectors, advanced self-tests on meter operation with self-diagnostics, and 200-point data logging. Data can be downloaded to printer or computer via the RS-232 connection. Benchtop meters meet IP54 specifications for protection from water and are compatible with an optional USB interface cable. These meters are CE marked, CSA certified, and UL listed. The waterproof handheld meters meet IP67 specifications. Handheld meters also feature an extended-life battery for up to 2000 hours of uninterrupted operation. Product Specifications: Concentration Range: 0.00 to 90.00 mg/L . Concentration Resolution: 0.0, 0.00 . Concentration Accuracy: ±0.2 mg/L . Saturation Range: 0.0 to 600%. Saturation Resolution: 0, 0.0. Saturation Accuracy: ±2%. Salinity Range: 0 to 45 ppt. Barometric Pressure: 450 to 850 mm Hg. Temperature: Range: —5 to 105°C (23 to 221°F). Resolution: 0.1 up to 99.9°C, 1.0. Relative Accuracy: ±0.1°C.

VWR SympHony Dissolved Oxygen Meter, SP70D Handheld Meter with DO Probe 11388-374 $945 VWR sympHony Dissolved Oxygen Meters Simple 3-Button Operation. Bright LCD Display with Ready Indicator. Automatic Barometric Pressure Compensation. Auto-Read and Auto-Hold Functions. VWR Three-Year Limited Warranty. Ideally suited for water laboratories as well as general lab use, these dissolved oxygen meters offer easy operation and a clear, intuitive user interface. Meters display dissolved oxygen (DO) concentration and percent DO saturation. A unique feature allows calibration to Winkler Titration, which improves accuracy by directly measuring oxygen concentration. Enhanced stability indicators, salinity correction, and automatic barometric pressure compensation simplify the measurement process for non-technical users. Up to 10 setup parameters and calibrations may be stored and password-protected, making them ideal for multiple users. Additional methods, as well as software updates, are available for download. Meters feature a fixed polarographic probe, waterproof mini-DIN locking DO probe connectors, advanced self-tests on meter operation with self-diagnostics, and 200-point data logging. Data can be downloaded to printer or computer via the RS-232 connection. Benchtop meters meet IP54 specifications for protection from water and are compatible with an optional USB interface cable. These meters are CE marked, CSA certified, and UL listed. The waterproof handheld meters meet IP67 specifications. Handheld meters also feature an extended-life battery for up to 2000 hours of uninterrupted operation. Product Specifications: Concentration Range: 0.00 to 90.00 mg/L . Concentration Resolution: 0.0, 0.00 . Concentration Accuracy: ±0.2 mg/L . Saturation Range: 0.0 to 600%. Saturation Resolution: 0, 0.0. Saturation Accuracy: ±2%. Salinity Range: 0 to 45 ppt. Barometric Pressure: 450 to 850 mm Hg. Temperature: Range: —5 to 105°C (23 to 221°F). Resolution: 0.1 up to 99.9°C, 1.0. Relative Accuracy: ±0.1°C.

Winkler Test for Dissolved Oxygen $70.1 High Quality Content by WIKIPEDIA articles The Winkler test is used to determine the concentration of dissolved oxygen in water samples. Dissolved Oxygen, abbreviated D.O., is widely used in water quality studies and routine operation of water reclamation facilities. An excess of manganese salt, iodide and hydroxide ions are added to a water sample causing a white precipitate of Mn(OH)2 to form. This precipitate is then oxidized by the dissolved oxygen in the water sample into a brown manganese precipitate. In the next step, a strong acid (either hydrochloric acid or sulfuric acid) is added to acidify the solution. The brown precipitate then convert the iodide ion to Iodine. The amount of dissolved oxygen is directly proportional to the titration of Iodine with a thiosulfate solution Author: Surhone, Lambert M./ Timpledon, Miriam T./ Marseken, Susan F. Binding Type: Paperback Number of Pages: 98 Publication Date: 2010/07/19 Language: English Dimensions: 6.00 x 9.02 x 0.23 inches

Spo2, Dissolved Oxygen, and Cardiac Information on a Medical Monitor $39.99 Greg Spo2, Dissolved Oxygen, and Cardiac Information on a Medical Monitor - Photographic Print

VWR SympHony Dissolved Oxygen Probe $671.65 Features of the VWR SympHony Dissolved Oxygen Probe: Dissolved oxygen probe with temperature sensor designed for laboratory and field use. Minimum sample flow: 20 cm/sec. Temperature range: -5 to 45°C Length: 100mm Lead length: 3m

Fisher MSA Miniox Oxygen Meter $692.5 Fisher MSA Miniox Oxygen Meter

Total Dissolved Solids (TDS) Meter $64.65 Use this TDS meter to check the performance of your water filter and check for hardness. Make sure you always drink pure water with this handy meter.Check the performance of your water filterCheck for hardness (1grain=17ppm)Make sure you always drink pure water Hold function: Saves measurements for convenient reading and recording Auto-off function: Turns off meter after 10 minutes of non-use to conserve batteriesDual Range: Measures from 0-999ppm, with a resolution is 10ppm, indicated by drinking x10image Factory calibrated Range: 0-9990 ppmAccuracy: +/- 2-percent Requires two 1.5-volt batteries (Button Cell)Size: 5.5 inches x 0.9 inches x 0.55 inches Weight: 32g (1.13 ounces)

Dissolved Gas Concentration in Water $140 Aquacultural, oceanographic, and fisheries engineering, as well as other disciplines, require gas solubility data to compute the equilibrium concentration. These calculations, for example, can affect the output of aquacultural production or assist in environmental consulting. Until now, published solubility information has not been available in a consistent and uniform manner in one location. This book presents solubility concentrations of major atmospheric gases (oxygen, nitrogen, argon, carbon dioxide), noble gases (helium, neon, krypton, xenon), and trace gases (hydrogen, methane, nitrous oxide) as a function of temperature, salinity, pressure, and gas composition in a variety of formats. Data, equations, and theory are explained so that the user is able to understand the calculations and problems. Furthermore, data and solubility information are presented in a range of units to make them accessible across disciplines. This book will help the reader to look at a problem from a quantitative viewpoint and better understand carbonate chemistry. Revised from the earlier edition to include more accurate carbon dioxide tables and separate sections on the solubility of noble gases, trace gases, and oxygen in brines to provide a single resource for gas solubility data. This book is essential for all students and practitioners working in aquatic fields. A single source for highly accurate and comprehensive tables for gas solubility in aquatic systems Information provided in tables, equations, and computer programmes Theory is presented to better understand the equations and calculations

HM Digital TDS3 Total Dissolved Solids Handheld Meter with Carrying Case $43.04 TDS3 is a TDS Water Meter With Carrying Case. Ideal for all water purification applications wastewater regulation aquaculture hydroponics and colloidal silver. Perfect for both consumer or commercial use. Carry one in your pocket or toolbox at all times. Ideal for commercial use. Includes a carrying case with belt clip. TDS3 Water Tester measures the amount of Total Dissolved Solids in water and other solutions. Highly efficient and accurate due to its advanced microprocessor technology. Hold Function: saves measurements for convenient reading and recording. Autooff function: the meter shuts off automatically after 10 minutes of nonuse to conserve batteries. Measurement Range: 09990 ppm. From 0999 ppm the resolution is in increments of 1ppm. From 1000 to 9990 ppm the resolution is in increments of 10ppm indicated by a blinking x10 image. Builtin digital thermometer. Display: large and easytoread LCD screen. TDS Meters can be recalibrated with a miniscrewdriver. Also available in x10 mode: reads in increments only of 10 ppm (09990 ppm). TDS Range: 0 9990 ppm (mg/L). Temp. Range: 0 80 degrees Celsius. Resolution: 1 ppm 1 degree Celsius (also available in 10 ppm). Accuracy: +/ 2. ATC: Builtin sensor for Automatic Temperature Compensation of 1 to 50 degrees Celsius (33 to 122 degrees Fahrenheit). Power source: 2 x 1.5V button cell batteries (included). Battery life: 1000 hours of usage.

HM Digital TDS4 Total Dissolved Solids Pocket Size Meter $41.55 This TDS tester is ideal for all water purification applications wastewater regulation aquaculture hydroponics and colloidal silver. This TDS4 Pocket Size Meter is the smallest and lightest TDS meter in the market. The Sleek design of the TDS4 is perfect for personal or commercial use. The TDS4 Tester comes with advanced microprocessor technology. Hold Function: Saves measurements for convenient reading and recording. Autooff function: The meter shuts off automatically after 10 minutes of nonuse to conserve batteries. Measurement Range: 09990 ppm. From 0999 ppm the resolution is in increments of 1 ppm. From 1000 to 9990 ppm the resolution is in increments of 10 ppm indicated by a blinking x10 image. Display: Large and easytoread LCD screen. Factory Calibrated: The meter is calibrated with a 342 ppm NaCl solution and can be recalibrated with a miniscrewdriver. Range: 0 9990 ppm (mg/L). Resolution: 1 ppm. Accuracy: +/ 2. Conversion Factor: NaCl (avg. 0.5). ATC: Builtin sensor for Automatic Temperature Compensation of 1 to 50 degrees Celsius (33 to 122 degrees Fahrenheit). Power Source: 2 x 1.5V button cell batteries (included) (357A). Battery Life: 1000 hours of usage. Dimensions: 5.5 H x 0.9 W x 0.55 D.

Shopzeus USA zeusd1EPST1456269 Saltwater Labs Dissolved Oxygen Mini Lab 60 Tests $40.34 Dissolved Oxygen is a vital element to test in any pond undergoing an algae bloom or treatmEnt Maintaining natural oxygen levels is essential to every biological function happening in an aquarium or pondRed Sea Test kits offer easy to use color charts for proper interpretation You do not have to look at slightly varried shades of pink or yellow when you use a Red Sea kit. Performs 60 tests. Titration test with chart for proper level identification

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HM Digital AquaPro Handheld Water Total Dissolved Solids Tester AP1 $47.29 The AquaPro Water Quality Tester measures total dissolved solids and temperature. This TDS Meter has automatic temperature compensation (ATC). The Water Tester AP1 comes with a waterresistant housing. The AquaPro AP1 measurement range is 05000 ppm. The AquaPro Water Tester AP1 by HM Digital ofers push button digital calibration. This AquaPro water tester features autooff function datahold function and lowbattery indicator. The AquaPro AP1 features a large and easytoread LCD screen and can read temperatures simultaneously. The AP1 is factory calibrated. The AquaPro Water Tester is calibrated with a 342 ppm NaCl solution. This meter can be recalibrated with digital calibration using the push buttons rather than a screwdriver. The AP1 TDS meter also includes a cap and batteries. TDS Range: 05000 ppm (mg/L). Temperature Range: 080 degrees C; 32176 degrees F. Resolution: 1 ppm. Temperature Resolution: 0.1 degrees C/F. Accuracy: +/ 2. Conversion Factor: NaCl (avg. 0.5). Calibration: Digital calibration by push button. Water resistant housing. Power Source: 1 x 3V button cell (included) (model CR2032). Dimensions: 5.9 H x 1.1 W x 0.5 D.

Auto Meter Oxygen (O2) Sensor Kit $111.95 For Air/Fuel ratio gauges. Includes sensor, weather pack harness and weld fitting. Item 2244. Visit our Auto Meter Accessories section or our Auto Meter Store to browse our large selection of high quality racing instruments.

Tribest WD1109048 Pure Water T.D.S Meter $64.94 Total Dissolved Solids Meter. Handheld with soft pouch and pocket clip. Used for testing the amount of dissolved solids in your water from 1999 parts per million. Digital screen provides accurate measurements.

Meter $6 Meter

Computation of Dissolved Gas Concentration in Water As Functions of Temperature, Salinity and Pressure (Hardcover) $252.13 Aquacultural, oceanographic, and fisheries engineering, as well as other disciplines, require gas solubility data to compute the equilibrium concentration. These calculations, for example, can affect the output of aquacultural production or assist in environmental consulting. Until now, published solubility information has not been available in a consistent and uniform manner in one location. This book presents solubility concentrations of major atmospheric gases (oxygen, nitrogen, argon, carbon dioxide), noble gases (helium, neon, krypton, xenon), and trace gases (hydrogen, methane, nitrous oxide) as a function of temperature, salinity, pressure, and gas composition in a variety of formats. Data, equations, and theory are explained so that the user is able to understand the calculations and problems. Furthermore, data and solubility information are presented in a range of units to make them accessible across disciplines. This book will help the reader to look at a problem from a quantitative viewpoint and better understand carbonate chemistry. Revised from the earlier edition to include more accurate carbon dioxide tables and separate sections on the solubility of noble gases, trace gases, and oxygen in brines to provide a single resource for gas solubility data. This book is essential for all students and practitioners working in aquatic fields.A single source for highly accurate and comprehensive tables for gas solubility in aquatic systemsInformation provided in tables, equations, and computer programmesTheory is presented to better understand the equations and calculations

Dissolved Organic Carbon $68.51 High Quality Content by WIKIPEDIA articles Dissolved organic carbon (DOC) is a broad classification for organic molecules of varied origin and composition within aquatic systems. The dissolved fraction of organic carbon is an operational classification. Many researchers place the dissolved/colloidal cutoff at 0.45 micrometers, but 0.22 micrometers is also typical. Author: Miller, Frederic P./ Vandome, Agnes F./ McBrewster, John Binding Type: Paperback Number of Pages: 78 Publication Date: 2010/09/09 Language: English Dimensions: 6.00 x 9.02 x 0.19 inches

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Liquatec PM3000 TDS Pocket Meter $46.37 Features:. The Liquatec PM3000 TDS Pocket Meter measures total dissolved solids in water from 1 to 2 999 ppm. The PM3000 Pocket TDS Meter comes with a plastic carrying case for easy transport and safe storage. With its extended range of 12 999 ppm the Liquatec PM3000 meter can work with most any well water application with out the need of two different meters. Obtain reliable and accurate measurements of your water source with the PM3000. Ideal for water treatment as well as other industrial and commercial application. This model is lightweight and simple to operate. The PM3000 auto shutoff function shuts the meter off automatically after 15 minutes of nonuse to conserve batteries. The Liquatec PM3000 TDS Meter display is a large and easytoread LCD screen. The Liquatec PM3000 TDS Meter is factory calibrated so recalibration is not necessary for initial testing. Recalibration can be done easily with a watch screwdriver. Recalibration instructions are included with the TDS Meter. The Liquatec Total Dissolved Solids Meter can be used in the following applications:. 1. Water Purification. 2. Reverse Osmosis. 3. Distillation. 4. DeIonization. 5. Pool Spa Maintenance. 6. Aquariums. 7. Plating Industry. 8. Cooling Towers Boilers. 9. Photographic Labs. Specs:. Auto ShutOff after 15 minutes of nonuse. Automatic Temperature Compensation. TDS Range: 12 999 ppm. Resolution: 1 ppm. Accuracy: +/ 5 77F (25C). Battery (included): Single 3V Lithium CR2032. Battery Life: 30hrs. Weight: 1.3oz (37g). Size(LxWxH): 5.8 x 1.2 x 0.6 in (146 x 30 x 15mm).

EC Dipstick Meter: HY $66.3 EC Dipstick (formerly Nutrawand) by Control Wizard Products.New Name! New Label! Same Easy to Use Meter! Now with the 4 most popular scales: EC, CF, 500:1ppm, and 700:1ppm! No matter what meters you have used in the past, the EC Dipstick can read just like it. EC Dipstick (formerly Nutrawand) by Control Wizard Products dissolved salts pen, measures conductivity in both PPM, EC and CF. No calibration required, auto on/off. Very Nice!Over the years Control Wizard Products' EC Dipstick (formerly Nutrawand) has proven to be a rugged performer and great conductivity meter that everyone that owns one seems to love. Why, well they just seem to work harder the more demanding the situation. It's great for greenhouse use where high moisture situations exist or in classrooms where students are learning how to care for tools. The meter is waterproof to 1 meter for short periods of time. Its new electronics allow for hassle free operation. It does not require calibration like other meters. Calibration is all handled internally within its electronic brain. Each time you replace batteries it recalibrates itself. Wow, how cool is that? The savings in calibration solution over 5 years alone makes this meter a real buy. It measures conductivity in 4 scales: EC, CF and 2 PPM scales. EC stands for electrical conductivity, PPM stands for parts per million and CF stands for conductivity factor. Conductivity factor is simply ten times the EC reading for easy reference (1.5 EC reads 15 CF). Another feature that's a real advantage is with just a glance, the EC Dipstick allows you to easily read all scales at once. Well-placed blinking LED lights show you the conductivity of your nutrient from a brightly printed scale. This is one instance that new technology has actually made the product easier and more fun to use instead of hideously more complicated and time consuming. Want icing on your cake? This meter uses three inexpensive AA flashlight batteries. This meters worthiness should be a no-brainer for all growers young and old. This meter comes with a limited two-year warranty with your original sales receipt.