Water Quality Products, Oakton

WD-00651-30 Traceable® pH Standard Buffer with Calibration, Clear, pH 4, 1000 mL by Oakton

Oakton pH buffers are compared against, and are traceable to, NIST Standard Reference Materials. Each bottle includes a NIST-traceable calibration report stating accuracy at 25°C to ±0.010 pH. Color-coded and colorless buffers are available in 500-mL, 1-L, or 4-L packaging sizes. Additional values and packaging sizes are available. Store at room temperature.

Certified Reference Materials (CRM) meet federal, state, and or local agencies' strictest mandates, and deliver exact calibration results for any pH meter. A2LA ISO/IEC 17025:2005 (1750.01) (Calibration Laboratory) and ISO Guide 34 (Certified Reference Material Producer) provide highest achievable levels of product production, documentation, and accuracy. Additional accreditations include ISO 31 (content) and ISO 35 (statistical analysis). ISO 9001 ensures that world-class product standards for Materials are always met.

Traceable® products are calibrated to NIST-traceable standards and ready to use as soon as you receive it. Each product goes through an intense vetting process before it can carry the Traceable name, and it includes NIST-traceable certification. This means that a 17025-accredited calibration test lab has confirmed that the product meets or exceeds all stated specifications, saving you both time and money by not having to calibrate separately. NIST-traceable calibration also helps you meet quality standards and regulatory compliance for ISO, FDA, cGMP, VFC, CAP, CLIA and Joint Commission requirements.

NIST-traceable reference materials include a calibration report from an ISO 17034 and ISO 17025 accredited laboratory

• Choose from clear or color-coded standards from common calibration points
• 1000 mL (32 fl.oz.) capacity
• Calibrate at pH 4

WD-35660-38 EC250 Waterproof Conductivity, TDS, Resistivity, and Salinity Handheld Meter by Oakton

Get easy-to-read and accurate readings with auto-hold, auto-stable, and real-time measurements with stability indicators. The Environmental Express® Oakton® 200 series of water quality meters features an electrode status indicator, which shows the condition of the electrode after each calibration. Easily view electrode condition, reading stability, measured parameter, and temperature in one screen. Don't worry about accuracy in fluctuating temperature—ATC ensures measurement accuracy. The simple user interface features adjustable auto shut-off time ranging from 1 to 30 minutes. Self-diagnosing meters display measurement and meter issues for fast fault finding and troubleshooting.

Easily take measurements and conveniently store meter and electrodes with built-in foldable stand on the back of the meter. Two grooves on the side of the meter serve as electrode holders, to hold up to 2 electrodes.

Choose from two series—the 250 series feature 500 data points while the 260 series features 1000 data points, a real-time clock, and USB communication.

• Rugged, waterproof, and dustproof with an IP67 rating for use in any environment
• Nonslip ergonomic design for comfortable handling
• Easily view measurements with large monochrome LCD with white LED backlighting
• Download and analyze data with USB output and phono jack printer connections
• Take it with you—500 hours of battery life
• Accurately measure conductivity, TDS, resistivity, salinity, and temperature

Includes

meter, and 2 AA batteries.

WD-35660-34 PH250 Waterproof pH and ORP Handheld Meter by Oakton

Get easy-to-read and accurate readings with auto-hold, auto-stable, and real-time measurements with stability indicators. The Environmental Express® Oakton® 200 series of water quality meters features an electrode status indicator, which shows the condition of the electrode after each calibration. Easily view electrode condition, reading stability, measured parameter, and temperature in one screen. Don't worry about accuracy in fluctuating temperature—ATC ensures measurement accuracy. The simple user interface features adjustable auto shut-off time ranging from 1 to 30 minutes. Self-diagnosing meters display measurement and meter issues for fast fault finding and troubleshooting.

Easily take measurements and conveniently store meter and electrodes with built-in foldable stand on the back of the meter. Two grooves on the side of the meter serve as electrode holders, to hold up to 2 electrodes.

Choose from two series—the 250 series feature 500 data points while the 260 series features 1000 data points, a real-time clock, and USB communication.

• Rugged, waterproof, and dustproof with an IP67 rating for use in any environment
• Nonslip ergonomic design for comfortable handling
• Easily view measurements with large monochrome LCD with white LED backlighting
• Download and analyze data with USB output and phono jack printer connections
• Take it with you—500 hours of battery life
• Accurately measure pH, ORP and temperature

Includes

meter, and 2 AA batteries.

WD-27003-00 Self-cleaning pH Electrode, CPVC Housing, 10-ft Cable, BNC by Oakton

No more solid buildups

• Flat surface prevents buildups, while fluid flow cleans surface for longer life
• Use with most meters and controllers - BNC connector and ATC element work with a variety of units
• Double junction for difficult applications

WD-35660-12 PH260 Waterproof pH and ORP Handheld Meter Kit by Oakton

Get easy-to-read and accurate readings with auto-hold, auto-stable, and real-time measurements with stability indicators. The Environmental Express® Oakton® 200 series of water quality meters features an electrode status indicator, which shows the condition of the electrode after each calibration. Easily view electrode condition, reading stability, measured parameter, and temperature in one screen. Don't worry about accuracy in fluctuating temperature—ATC ensures measurement accuracy. The simple user interface features adjustable auto shut-off time ranging from 1 to 30 minutes. Self-diagnosing meters display measurement and meter issues for fast fault finding and troubleshooting.

Easily take measurements and conveniently store meter and electrodes with built-in foldable stand on the back of the meter. Two grooves on the side of the meter serve as electrode holders, to hold up to 2 electrodes.

Choose from two series—the 250 series feature 500 data points while the 260 series features 1000 data points, a real-time clock, and USB communication.

• Rugged, waterproof, and dustproof with an IP67 rating for use in any environment
• Nonslip ergonomic design for comfortable handling
• Easily view measurements with large monochrome LCD with white LED backlighting
• Download and analyze data with USB output and phono jack printer connections
• Take it with you—500 hours of battery life
• Accurately measure pH, ORP and temperature

Includes

meter, electrode, calibration solutions, and 2 AA batteries.

WD-35635-15 T-100IR Portable Infrared Turbidity Meter Kit by Oakton

The Oakton T-100 series portable turbidity meters feature five calibration points—0 NTU, 20 NTU, 100 NTU, 400 NTU, and 800 NTU. The 0 NTU uses laboratory distilled or deionized water, while the other four calibration points are configured using high molecule polymer standard solutions included in the kits. The meters also include normal and continuous measurement modes, parameter setup, data recall, real-time clock, calibration date check, automatic power off, and low voltage indication. The continuous measure mode allows you to automatically generate average, maximum and minimum measured values in a data storage interface, suitable for sample solutions with rapid settling and continuous measurement changes.

The large TFT color screen displays a blue background for measurement mode, green background for calibration mode, and features operation guides for easy calibration and measurement. Up to 200 sets of data can be stored on the meter. A USB interface cable can transfer this data to your computer for future analysis.

• Auto-ranging from 0 to 1000 NTU (FNU)
• Stores up to 200 sets of data
• Suitable for field use—meets IP67 water-resistant requirements
• Infrared light source delivers high accuracy across entire range
• Meets performance criteria as specified by ISO 7027 (DIN EN 27027) method

Includes

Six 25 x 60 mm sample test cuvettes, five 60-mL polymer standard calibration solutions (0.0, 20, 100, 400, and 800 NTU), 10 mL of silicone oil, microfiber wiping cloth, PCLink software on USB flash drive, hard carrying case, rechargeable Lithium battery and USB cable with power adapter.

WD-27504-10 Cole-Parmer® Combination Ion-Selective Electrode (ISE), Copper (Cu+2) by Oakton

Whether your application involves end point determinations in potentiometric titrations or continuous monitoring of specific ions, we can help you find the right electrode for the job. These fast and accurate electrodes do not require an external reference - they're easier to use than separate sensing and reference half-cell electrodes. All Cole-Parmer electrodes are double-junction combination ion-selective electrodes and are convenient to use in places where two electrodes won't fit. All electrodes include a 30-mL bottle of reference solution, a reference filling pipette, 1-m cable, BNC connector, and an instruction manual. Solid-state electrodes also have twelve polishing strips.

Economy Epoxy Electrodes have a durable epoxy body and are well-suited for portable field applications. Outer reference chamber is silver-free and resists contamination. These electrodes are refillable.

Laboratory Glass Electrodes are double-junction in design, with a glass body that provides high-quality measurements for your laboratory applications. Improved glass seal enhances performance and reliability. Sealed inner junctions and refillable outer junctions accommodate special reference fill solutions - ideal for low-concentration measurements. Use electrodes with a meter that has a resolution of 0.1 mV for the most accurate results. Many meters in our "pH/Ion Meters" section have 0.1 mV resolution; several also give direct readings in ppm. For monitoring ions not listed below, call our Application Specialists for more electrode application information.

• Cost-effective choices that are easy to use
• Easily fit into small spaces - no additional reference electrode is needed
• Copper (Cu⁺²) ISE with epoxy body

WD-27502-03 Cole-Parmer® Ion-Selective Electrode (ISE), Ammonium, Double-Junction, BNC by Oakton

Whether your application involves end point determinations in potentiometric titrations or continuous monitoring of specific ions, we can help you find the right electrode for the job. These fast and accurate electrodes do not require an external reference - they're easier to use than separate sensing and reference half-cell electrodes. All Cole-Parmer electrodes are double-junction combination ion-selective electrodes and are convenient to use in places where two electrodes won't fit. All electrodes include a 30-mL bottle of reference solution, a reference filling pipette, 1-m cable, BNC connector, and an instruction manual. Solid-state electrodes also have twelve polishing strips.

Economy Epoxy Electrodes have a durable epoxy body and are well-suited for portable field applications. Outer reference chamber is silver-free and resists contamination. These electrodes are refillable.

Laboratory Glass Electrodes are double-junction in design, with a glass body that provides high-quality measurements for your laboratory applications. Improved glass seal enhances performance and reliability. Sealed inner junctions and refillable outer junctions accommodate special reference fill solutions - ideal for low-concentration measurements. Use electrodes with a meter that has a resolution of 0.1 mV for the most accurate results. Many meters in our "pH/Ion Meters" section have 0.1 mV resolution; several also give direct readings in ppm. For monitoring ions not listed below, call our Application Specialists for more electrode application information.

• Cost-effective choices that are easy to use
• Easily fit into small spaces - no additional reference electrode is needed
• Ammonium (NH₄⁺) ISE with glass body

WD-35635-20 Replacement Turbidity Calibration Solution Kit: 20, 100, 400, and 800 NTU Standards by Oakton

• Includes one each of 60-mL HPDE bottle of four NTU standards

WD-27003-04 Cole-Parmer® Self-cleaning pH Electrode, CPVC Housing, 1 k Ohms RTD by Oakton

• Flat surface prevents buildups, while fluid flow cleans surface for longer life
• Use with most meters and controllers - BNC connector and ATC element work with a variety of units
• Double junction for difficult applications

WD-35419-31 PH 550 Replacement pH Electrode with Temperature Sensor by Oakton

Replace electrodes when they break, no longer hold calibration, cannot be rehydrated, or are not compatible with your sample.

WD-35613-25 pH 100 Portable pH meter with pH and Temperature Probes by Oakton

The new addition to the Environmental Express Oakton product line features updates to measuring water quality easier and faster. The larger display is 2.75 in. by 2.0 in. for better viewing angle, and has indicators for battery life, stability, and calibration. It also shows both the parameter and temperature measurements at the same time. The pH 100 meter measures pH, mV, ORP, and temperature.

The built-in microprocessor chip enables advanced functions, such as auto calibration, auto temperature compensation, parameter setting, self-diagnosis, auto power-off, and low-battery reminders. The meter uses advanced digital processing technology, intelligently improving the response time and accuracy of your measurements. Stable reading and auto lock display modes are available.

• Measured parameter and temperature shown on display at same time
• Utilizes same electrodes as Oakton 6+ series
• Stability, calibration, and low-battery indicators
• Waterproof and dust-resistant IP57 rating – great for use under harsh environments

INCLUDES

Meter includes three AA batteries.

pH 100 portable pH meter, plastic combination pH electrode, and temperature probe

WD-27504-24 Cole-Parmer® Combination Ion-Selective Electrode (ISE), Perchlorate (ClO4) by Oakton

Whether your application involves end point determinations in potentiometric titrations or continuous monitoring of specific ions, we can help you find the right electrode for the job. These fast and accurate electrodes do not require an external reference - they're easier to use than separate sensing and reference half-cell electrodes. All Cole-Parmer electrodes are double-junction combination ion-selective electrodes and are convenient to use in places where two electrodes won't fit. All electrodes include a 30-mL bottle of reference solution, a reference filling pipette, 1-m cable, BNC connector, and an instruction manual. Solid-state electrodes also have twelve polishing strips.

Economy Epoxy Electrodes have a durable epoxy body and are well-suited for portable field applications. Outer reference chamber is silver-free and resists contamination. These electrodes are refillable.

Laboratory Glass Electrodes are double-junction in design, with a glass body that provides high-quality measurements for your laboratory applications. Improved glass seal enhances performance and reliability. Sealed inner junctions and refillable outer junctions accommodate special reference fill solutions - ideal for low-concentration measurements. Use electrodes with a meter that has a resolution of 0.1 mV for the most accurate results. Many meters in our "pH/Ion Meters" section have 0.1 mV resolution; several also give direct readings in ppm. For monitoring ions not listed below, call our Application Specialists for more electrode application information.

• Cost-effective choices that are easy to use
• Easily fit into small spaces - no additional reference electrode is needed
• Perchlorate (ClO₄^-) ISE with epoxy body

WD-35419-28 pH 550 Benchtop pH Meter Kit with Probe, Stand, and pH Buffers by Oakton

The PH 550 benchtop pH meter features a microprocessor chip which provides automatic temperature compensation, data storage, parameter setup, and Max/Min reading display. The meter offers a pH range from 0 to 14 and a three-point automatic calibration, with the ability to recognize standard buffer solutions (USA or NIST series). The advanced digital processing technology improves meter response time and measuring accuracy. A stable reading display icon appears when the measuring value is stable.

The 3-in-1 combination pH electrode measures pH and temperature simultaneously. The compact meter includes a detachable electrode holder and three bottles of pH buffer solution. It has a dustproof and spillproof rating of IP54. Connectors are protected by silicone seal caps.

Oakton® pH Buffer Bottles have pH/temperature tables printed on the labels for accurate calibrations

• Manufactured under ISO 9000 quality guidelines and traceable to NIST standards
• If unopened, shelf life is 2 years; once opened, use pH 4 and pH 7 within 90 days, pH 10 within 30 days
• Store buffers away from direct sunlight.
• Color coded for quick visual reference: pH 4.01 buffer in red, pH 7.00 buffer in yellow, pH 10.01 buffer in blue

KEY FEATURES

• Automatically recognizes calibration solutions
• Compact design saves valuable benchtop space
• Data logging allows you to store and recall up to 50 groups of data
• IP54-rated housing is dust- and spill-proof
• Bundled kit for convenience and savings!
• All Oakton pH buffers are traceable to NIST standard reference materials
• Buffer solutions help you calibrate pH instruments to ensure accuracy

INCLUDES

Plastic 3-in-1 combination pH electrode, electrode holder, pH standard buffer solutions (4.00/7.00/10.01 pH, 500 mL each), and 9 VAC power adapter.

WD-00652-46 Traceable® Conductivity and TDS Standard, Individually-Tested, 100 μS; 500 mL by Oakton

• Oakton® Traceable® conductivity and TDS standards have detailed labels: KCl, NaCl, and 442 conversions, temperature corrections, and certified values referenced to 25°C-convenient!!
• Average accuracy at 25°C is ±0.25 microsiemens for 1, 5, 10 microsiemen (μS) solutions, or ±0.25% for all other solutions. The tested uncertainty is shown on the certificate, whichever is greater
• Conductivity options range from 1 to 200,000 μS/cm
• Individually-tested solutions are certified by the bottle - each bottle is analyzed for the best accuracy

METHODS SUPPORTED

Certified reference material meets test requirements for Federal, State, and local agencies, CAP, ASTM, NCCLS, CLSI, ACS, CLIA, AOAC, EPA, APHA, AWWA, WEF, USGS, USP, and ISO. Traceable® Conductivity Standards complies with and is essential for use in these official methods: AOAC 973.40, EPA 120.1, Standard Method 2510 (APHA, AWWA, WEF), ISO 7888, DIN 38404, ASTM D1125, USGS I-1780, USP 645, and for A2LA/NVLAP accreditations/ISO 9000 certifications. Material may be used to calibrate all conductivity meters and to determine all conductivity cell constants.

A2LA ACCREDITATION ISO/IEC 17025:2005 (1750.01)

To assure accuracy an individually serial-numbered Traceable® Certificate is supplied to indicate traceability to standards provided by NIST (National Institute of Standards and Technology) and/or a National Standards Laboratory. A2LA accredited certification provides the highest achievable level of quality assurance, documentation, and accuracy. Conductivity Standards are produced in an A2LA accredited ISO/IEC 17025:2005 (1750.01) calibration laboratory. Additional certifications include ISO 31 (certificate content) and ISO 35 (statistical analysis), plus ISO 9001 (certified quality manufacturer).

• All Oakton® Traceable® conductivity standards are NIST-traceable reference materials
• Supplied with a calibration report from an ISO 17034 and ISO 17025 accredited laboratory
• These standard solutions let you calibrate conductivity instruments to ensure accuracy
• If unopened, shelf life is one year; once opened, shelf life will vary by solution value
• Use when readings are expected to be around 100 μS/cm

INCLUDES

temperature compensation chart, TDS conversion chart, and NIST-traceable calibration certificate with data.

WD-53024-53 Dissolved Oxygen Meter Zero Oxygen Sachets, 10/PK by Oakton

Replace electrodes when they break, no longer hold calibration, cannot be rehydrated, or are not compatible with your sample.

WD-00651-06 Traceable® pH Standard Buffer with Calibration, Red, pH 4; 500 mL by Oakton

Oakton pH buffers are compared against, and are traceable to, NIST Standard Reference Materials. Each bottle includes a NIST-traceable calibration report stating accuracy at 25°C to ±0.010 pH. Color-coded and colorless buffers are available in 500-mL, 1-L, or 4-L packaging sizes. Additional values and packaging sizes are available. Store at room temperature.

Certified Reference Materials (CRM) meet federal, state, and or local agencies' strictest mandates, and deliver exact calibration results for any pH meter. A2LA ISO/IEC 17025:2005 (1750.01) (Calibration Laboratory) and ISO Guide 34 (Certified Reference Material Producer) provide highest achievable levels of product production, documentation, and accuracy. Additional accreditations include ISO 31 (content) and ISO 35 (statistical analysis). ISO 9001 ensures that world-class product standards for Materials are always met.

Traceable® products are calibrated to NIST-traceable standards and ready to use as soon as you receive it. Each product goes through an intense vetting process before it can carry the Traceable name, and it includes NIST-traceable certification. This means that a 17025-accredited calibration test lab has confirmed that the product meets or exceeds all stated specifications, saving you both time and money by not having to calibrate separately. NIST-traceable calibration also helps you meet quality standards and regulatory compliance for ISO, FDA, cGMP, VFC, CAP, CLIA and Joint Commission requirements.

NIST-traceable reference materials include a calibration report from an ISO 17034 and ISO 17025 accredited laboratory

• Choose from clear or color-coded standards from common calibration points
• 500 mL (16 fl.oz.) capacity
• Calibrate at pH 4
• Easily identify red color-coded formula

WD-00652-24 Traceable® Conductivity and TDS Standard, Batch-Tested, 10 μS; 500 mL by Oakton

• Oakton® Traceable® conductivity and TDS standards have detailed labels: KCl, NaCl, and 442 conversions, temperature corrections, and certified values referenced to 25°C-convenient!!
• Average accuracy at 25°C is ±0.25 microsiemens for 1, 5, 10 microsiemen (μS) solutions, or ±0.25% for all other solutions. The tested uncertainty is shown on the certificate, whichever is greater
• Conductivity options range from 1 to 200,000 μS/cm
• Batch-tested solutions are lot certified; a few bottles from a single lot are analyzed

METHODS SUPPORTED

Certified reference material meets test requirements for Federal, State, and local agencies, CAP, ASTM, NCCLS, CLSI, ACS, CLIA, AOAC, EPA, APHA, AWWA, WEF, USGS, USP, and ISO. Traceable® Conductivity Standards complies with and is essential for use in these official methods: AOAC 973.40, EPA 120.1, Standard Method 2510 (APHA, AWWA, WEF), ISO 7888, DIN 38404, ASTM D1125, USGS I-1780, USP 645, and for A2LA/NVLAP accreditations/ISO 9000 certifications. Material may be used to calibrate all conductivity meters and to determine all conductivity cell constants.

A2LA ACCREDITATION ISO/IEC 17025:2005 (1750.01)

To assure accuracy an individually serial-numbered Traceable® Certificate is supplied to indicate traceability to standards provided by NIST (National Institute of Standards and Technology) and/or a National Standards Laboratory. A2LA accredited certification provides the highest achievable level of quality assurance, documentation, and accuracy. Conductivity Standards are produced in an A2LA accredited ISO/IEC 17025:2005 (1750.01) calibration laboratory. Additional certifications include ISO 31 (certificate content) and ISO 35 (statistical analysis), plus ISO 9001 (certified quality manufacturer).

• All Oakton® Traceable® conductivity standards are NIST-traceable reference materials
• Supplied with a calibration report from an ISO 17034 and ISO 17025 accredited laboratory
• These standard solutions let you calibrate conductivity instruments to ensure accuracy
• If unopened, shelf life is one year; once opened, shelf life will vary by solution value
• Use when readings are expected to be around 10 μS/cm

INCLUDES

temperature compensation chart, TDS conversion chart, and NIST-traceable calibration certificate with data.

WD-35604-15 EC 100 Portable Conductivity Meter Kit with Case, EC/ATC Probe, and Solutions by Oakton

The new addition to the Environmental Express Oakton product line features updates to measuring water quality easier and faster. The larger display is 2.75 in. by 2.0 in. for better viewing angle, and has indicators for battery life, stability, and calibration. It also shows both the parameter and temperature measurements at the same time. The EC 100 meter measures conductivity, TDS, salinity, and temperature.

The built-in microprocessor chip enables advanced functions, such as auto calibration, auto temperature compensation, parameter setting, self-diagnosis, auto power-off, and low-battery reminders. The meter uses advanced digital processing technology, intelligently improving the response time and accuracy of your measurements. Stable reading and auto lock display modes are available.

• Measured parameter and temperature shown on display at same time
• Stability, calibration, and low-battery indicators
• Waterproof and dust-resistant IP57 rating – great for use under harsh environments

INCLUDES

Meter includes three AA batteries.

EC 100 portable conductivity meter, plastic conductivity electrode, temperature probe, 50 mL conductivity calibration solutions (84μS, 1413μS, & 12.85 mS, carrying case)

WD-35653-14 Conductivity Calibration Pouches, 12.88 mS; 20/Pk by Oakton

Single-use 20-mL pouches are sealed to ensure freshness - take these convenient standard solutions anywhere! Don't worry about transferring solution into another container - calibrate directly from the pouch.

A μS-to-ppm conversion table is printed on each pack for quick reference.

Sealed for freshness and easy travel

• Tear off a corner, or the entire top - opens wide enough for all probe types
• Notched corners for easy opening from either side
• Calibrate to 12,888 μS or 12.888 mS

EW-27505-00 Cole-Parmer Replaceable Membrane ISE Probe; Ammonium by Oakton

Membrane replacement saves time and the expense of electrode replacement — ideal for continuous or frequent sample analysis. The durable outer epoxy body is ideal for field applications and the PVC membranes are color coded for easier identification. To sense a new ion, interchange membranes of the same type. Simply replace the worn membrane without removing any other component of the electrode. The replaceable membrane is not part of the liquid junction, so adding the new membrane will not affect it. The reference electrolyte won t leak during membrane replacement. These double-junction combination electrodes require no external reference. Electrodes are refillable with an outer silver-free reference fill.

Electrodes with PVC Membranes include one sensing module (in place), reference fill solution, internal fill solution, BNC connector with 3-ft cable, and instruction manual.

Electrodes with Solid-State Membranes include one sensing module (in place), polishing strips, reference fill solution, BNC connector with 3-ft cable, and instruction manual.

• Replace worn membranes quickly
• Extend the useful life of your electrodes

EW-27505-12 Cole-Parmer Replaceable Membrane ISE Probe; Nitrate by Oakton

Membrane replacement saves time and the expense of electrode replacement — ideal for continuous or frequent sample analysis. The durable outer epoxy body is ideal for field applications and the PVC membranes are color coded for easier identification. To sense a new ion, interchange membranes of the same type. Simply replace the worn membrane without removing any other component of the electrode. The replaceable membrane is not part of the liquid junction, so adding the new membrane will not affect it. The reference electrolyte won't leak during membrane replacement. These double-junction combination electrodes require no external reference. Electrodes are refillable with an outer silver-free reference fill.

Electrodes with PVC Membranes include one sensing module (in place), reference fill solution, internal fill solution, BNC connector with 3-ft cable, and instruction manual.

Electrodes with Solid-State Membranes include one sensing module (in place), polishing strips, reference fill solution, BNC connector with 3-ft cable, and instruction manual.

• Replace worn membranes quickly
• Extend the useful life of your electrodes

WD-00651-00 Traceable® pH Standard Buffer with Calibration, Clear, pH 4; 500 mL by Oakton

Oakton pH buffers are compared against, and are traceable to, NIST Standard Reference Materials. Each bottle includes a NIST-traceable calibration report stating accuracy at 25°:C to ±0.010 pH. Color-coded and colorless buffers are available in 500-mL, 1-L, or 4-L packaging sizes. Additional values and packaging sizes are available. Store at room temperature.

Certified Reference Materials (CRM) meet federal, state, and or local agencies' strictest mandates, and deliver exact calibration results for any pH meter. A2LA ISO/IEC 17025:2005 (1750.01) (Calibration Laboratory) and ISO Guide 34 (Certified Reference Material Producer) provide highest achievable levels of product production, documentation, and accuracy. Additional accreditations include ISO 31 (content) and ISO 35 (statistical analysis). ISO 9001 ensures that world-class product standards for Materials are always met.

Traceable® products are calibrated to NIST-traceable standards and ready to use as soon as you receive it. Each product goes through an intense vetting process before it can carry the Traceable name, and it includes NIST-traceable certification. This means that a 17025-accredited calibration test lab has confirmed that the product meets or exceeds all stated specifications, saving you both time and money by not having to calibrate separately. NIST-traceable calibration also helps you meet quality standards and regulatory compliance for ISO, FDA, cGMP, VFC, CAP, CLIA and Joint Commission requirements.

NIST-traceable reference materials include a calibration report from an ISO 17034 and ISO 17025 accredited laboratory

• Choose from clear or color-coded standards from common calibration points
• 500 mL (16 fl.oz.) capacity
• Calibrate at pH 4

WD-00651-02 Traceable® pH Standard Buffer with Calibration, Clear, pH 7; 500 mL by Oakton

Oakton pH buffers are compared against, and are traceable to, NIST Standard Reference Materials. Each bottle includes a NIST-traceable calibration report stating accuracy at 25°C to ±0.010 pH. Color-coded and colorless buffers are available in 500-mL, 1-L, or 4-L packaging sizes. Additional values and packaging sizes are available. Store at room temperature.

Certified Reference Materials (CRM) meet federal, state, and or local agencies' strictest mandates, and deliver exact calibration results for any pH meter. A2LA ISO/IEC 17025:2005 (1750.01) (Calibration Laboratory) and ISO Guide 34 (Certified Reference Material Producer) provide highest achievable levels of product production, documentation, and accuracy. Additional accreditations include ISO 31 (content) and ISO 35 (statistical analysis). ISO 9001 ensures that world-class product standards for Materials are always met.

Traceable® products are calibrated to NIST-traceable standards and ready to use as soon as you receive it. Each product goes through an intense vetting process before it can carry the Traceable name, and it includes NIST-traceable certification. This means that a 17025-accredited calibration test lab has confirmed that the product meets or exceeds all stated specifications, saving you both time and money by not having to calibrate separately. NIST-traceable calibration also helps you meet quality standards and regulatory compliance for ISO, FDA, cGMP, VFC, CAP, CLIA and Joint Commission requirements.

NIST-traceable reference materials include a calibration report from an ISO 17034 and ISO 17025 accredited laboratory

• Choose from clear or color-coded standards from common calibration points
• 500 mL (16 fl.oz.) capacity
• Calibrate at pH 7