OAKTON Instruments
Oakton brand products provide incredible quality at economical prices. Whether you are performing water analysis in the lab or in the field, our products are designed with the end users requirements at top of mind. The Oakton line includes handheld portable meters, pocket testers, benchtop meters, and specialty pH/mV meters plus ISE electrodes and ISFET electrodes that handle specific ion applications and harsh environments.
- 800-343-5319
+1 843-881-6560 - +1 843-881-3964
- info@environmentalexpress.com
- sales@environmentalexpress.com
- 2345A Charleston Regional Parkway
Charleston, SC 29492
United States of America
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Product
ORPTestr® 5 Waterproof Pocket Tester
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The pocket-sized OPR tester has a replaceable single-junction sensor which can be easily switched out, allowing you to save money by using the tester body over and over again. A large LCD makes viewing measurements easy and features a three-color backlight indicating operational mode—blue for measurement, green for calibration and red for alarm condition. It is ideal for checking dirty water, heavy metals, sulfides, and organic materials. Additional features include hold function to lock in measurements, self-diagnostic error message, and status icons for measurement stability and low battery voltage. The IP67-rated housing features an easy-to-grip design and floats if accidentally dropped in water when sensor cap is on. Powered by four AAA batteries, the testers can operate up to 400 hours continuously. To conserve power, the unit will auto power-off after 8 minutes of nonuse.
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Product
pH 620 Waterproof Meters
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These waterproof handheld meters feature a –2.00 to 20.00 pH range with 0.001 pH resolution. Combined with accuracies up to ±0.002 pH, these meters provide a new benchmark in our pH meter line. Store up to 500 data sets in the meter‘s memory. Time-and-date stamping meets Good Laboratory Practice (GLP) standards.The pH 620 meters offer the latest in pH calibration capabilities including up to six calibration points, a user-settable “calibration due” alarm, and up to 15 buffer options with auto-buffer recognition of USA, NIST, DIN, and PWB standards. The infrared (IrDA) wireless technology makes PC downloading more convenient and easier. Dual powerup allows you to use batteries while out in the field or the optional AC power adapter while in the lab.As always, our waterproof meters are IP67 rated for protection against both dust and water, even with no probes attached.
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Product
pHTestr® 50 Waterproof Pocket pH Tester,
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The Oakton pHTestr 50 has a replaceable double junction sensor for longer life, an expanded number of applications, and easy maintenance. Double-junction electrode sensor handles wastewater and solutions containing sulfides, heavy metals, and TRIS. Electrode sensor offers a clog-resistant Kynar® junction and a recessed, glass pH bulb to protect against breakage. Valox sensor housing resists most chemicals. The keypad clicks to confirm operation, and allows access to a variety of functions. Calibrate up to three pH points with the auto-buffer recognition at both USA and NIST standard buffers. Additional features include an automatic temperature compensation (ATC), hold function, auto-off function, self-diagnostic error messages, and a three-segment battery-life indicator.
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Product
pH 450 Waterproof Portable Meter
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Backlit, rugged waterproof meter is ideal for any environment!*Intuitive, user-friendly icons — electrode status displays pH slope*Grip-Clip™ electrode holder quickly and easily secures electrode to side of beaker or container*USB or RS-232 output for up to 500 data sets*Extended battery life or optional universal power adapter*Built-in stand with wall mount option allows for easy benchtop measurement or storage
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Product
250 and 260 Series pH Handheld Meter Kits
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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 (scroll thru on meter) while the 260 series features 1000 data points, a real-time clock, and USB communication for data down loads.
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Product
pHTestr® 5 Waterproof Pocket Testers
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These pocket-sized testers have a replaceable single-junction sensor which can be easily switched out, allowing you to save money by using the tester body over and over again. A large LCD makes viewing measurements easy and features a three-color backlight indicating operational mode—blue for measurement, green for calibration and red for alarm condition. Additional features include hold function to lock in measurements, self-diagnostic error message, and status icons for measurement stability and low battery voltage. The IP67-rated housing features an easy-to-grip design and floats if accidentally dropped in water when sensor cap is on. Powered by four AAA batteries, the testers can operate up to 400 hours continuously. To conserve power, the unit will auto power-off after 8 minutes of nonuse.
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Product
pHTestr® 10 Waterproof BNC Pocket pH Tester
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Simply choose the electrode best suited for your application, connect the pHTestr BNC 10, calibrate, and measure. Change electrodes to suit your application without having to purchase another meter. Order electrodes separately. Large display and tactile keypad allow for easy calibration along with USA and NIST auto-buffer recognition. Hold function freezes reading on the display for easy recording. Additional features include Valox® sensor housing, self-diagnostic error messages, a battery-life indicator, and an auto-off function to maximize battery life.
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Product
ION 100 Portable Ion Meter
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The new addition to the Environmental Express Oakton product line features updates to measuring water quality easier and faster. The larger LCD display is 2.75 in. by 2.0 in. for a better viewing angle, and has indicators for battery life, stability, and calibration. The ION 100 meter measures pH, mV, ion concentration of 16 commonly measured ions, and temperature. The microprocessor-based meter features automatic calibration, automatic temperature compensation, function setup, self-diagnostics, automatic power-off, and low voltage display. The meter uses advanced digital processing technology, intelligently improving the response time and accuracy of your measurements. Easily switch units among pX, mol/L, and mg/L (ppm).
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Product
pH 100 Portable pH Meter
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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.
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Product
pHTestr® 50 Waterproof Pocket pH Tester,
Premium 50 Series
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The Oakton pHTestr 50 has a replaceable double junction sensor for longer life, an expanded number of applications, and easy maintenance. Double-junction electrode sensor handles wastewater and solutions containing sulfides, heavy metals, and TRIS. Electrode sensor offers a clog-resistant Kynar® junction and a recessed, glass pH bulb to protect against breakage. Valox sensor housing resists most chemicals. The keypad clicks to confirm operation, and allows access to a variety of functions. Calibrate up to three pH points with the auto-buffer recognition at both USA and NIST standard buffers. Additional features include an automatic temperature compensation (ATC), hold function, auto-off function, self-diagnostic error messages, and a three-segment battery-life indicator.
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Product
pHTestr® 30+ Waterproof Pocket Tester
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Waterproof pHTestr 30 is great for outdoor applications such as taking pH measurements in lakes and streams. Designed to float in water, you can even attach a line to the housing for easy retrieval. Valox sensor housing resists most chemicals.The pHTestr 30 has a replaceable sensor for easy maintenance. pHTestr 30 purchased before Oct. 2019 use replacement sensor 35624-38. pHTestr 30 purchased after Oct. 2019 use replacemenr sensor 35634-03. Double-junction electrode sensor handles wastewater and solutions containing sulfides, heavy metals, and TRIS. Electrode sensor offers a clog-resistant Kynar® junction and a recessed, glass pH bulb to protect against breakage.The keypad clicks to confirm operation, and allows access to a variety of functions. Calibrate up to three pH points with the auto-buffer recognition at both USA and NIST standard buffers. Additional features include a automatic temperature compensation (ATC), hold function, auto-off function, self-diagnostic error messages, and a three-segment battery-life indicator.
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Product
pH 5+ Handheld pH Meters
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These meters are perfect for fast, accurate results. Automatic temperature compensation (ATC) ensures accuracy from 0 to 80°C. Meters include a protective rubber boot that also acts as a meter stand.
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Product
pH 700 Benchtop pH Meter
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The easy-to-use, microprocessor-based pH 700 benchtop meter measures pH, mV, relative mV, and temperature. The large, dual-display LCD provides excellent visibility—even from a distance. Automatic temperature compensation (ATC) maintains reading accuracy even with fluctuating temperatures. Five-point pH calibration, with automatic buffer recognition for both USA (pH 1.68, 4.01, 7.00, 10.01, 12.45) and NIST (pH 1.68, 4.01, 6.86, 9.18, 12.45) pH buffers, makes for easy calibration no matter which requirement you need to meet. Meter features HOLD, ATC, selectable °F or °C measurement, recall of electrode slopand offset, and electrode diagnostics. The convenient pull-out quick reference card keeps procedures handy at all times. Meter accepts any pH or ORP electrodes with a BNC connector.
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Product
PH350 Waterproof Single-Channel pH and ORP Smart Handheld Meter Kit
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Get easy-to-read and accurate readings with auto-hold, auto-stable, and real-time measurements with stability indicators. The Environmental Express® Oakton® 300 series multiparameter meters utilize smart sensor technology with sensor heads that feature a built-in digital circuit for automatic sensor recognition. Sensor information including sensor ID, calibration data, and measurement setup is stored in sensor head and viewable on the meter display when sensor is connected. Sensor heads are easy to connect and disconnect with waterproof push-lock connector. Sensor cartridges (pH and EC) are replaceable for a cost-efficient and environmentally friendly system. Blue LED light on the sensor head functions as a reading stability indicator, flashing until the reading is stable. Meter stores up to 10,000 data sets with date-and-time stamp for accurate and easy analysis. Quickly transfer data from meter to computer seamlessly via USB cable or wirelessly via Wi-Fi. Easily take measurements and conveniently store meter and electrodes with built-in foldable stand on the back of the meter. Three grooves on the meter serve as electrode holders, to hold up to three electrodes simultaneously.
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pH 6+ Handheld pH Meters
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High +/-0.01 pH accuracy at an economical price*Convenient, compact design*Up to five-point push-button calibration with autobuffer recognition*Displays pH or mV and temperature with the press of a button

















