$100 - $150, Apera Instruments

AI4205 T500-S1 AMCO Turbidity Standard Calibration Solution Kit (20/100/400/800NTU) for TN500 by Apera

The standards have a guaranteed one-year shelf life even if you've opened the bottle and happened not to have recapped it tightly.

The convenient submicron polymer suspensions are non-toxic primary calibration standards approved by the US EPA for drinking water analysis for turbidity.

• Standard Calibration Solution Set for Apera Instruments White Light Portable Turbidity Meters (TN500 and TN420)
• AMCO Clear® turbidity standard solutions (20.0 NTU, 100 NTU, 400 NTU, 800 NTU).
• AMCO Clear® is an EPA approved primary standard for calibration of turbidity sensors that is safe, non-toxic and disposable. It is easy-to-use with no dilution or resuspension, and it is available in a wide range of values.

901 Intellegent Magnetic Stirrer by Apera

The Apera Instruments 901 Intelligent Magnetic Stirrer features stirring speed save and recall function, so you will never lose the specific speed that meet your measuring needs, great for general laboratory water solution analysis. Powered by DC9V power adaptor or 4 AA batteries, IP54 waterproof and dustproof housing with transparent coping design, so you can use it in labs or bring it to the field. Speed range: 0-2300 rpm (no load). Working diameter: ø100 mm. Maximum stirring volume: 1000 ml. Dimension: ø100*46*48 mm. Comes with complete accessories: Magnetic stirring bars, batteries, power adaptor, holder, and electrode clamp. The stirrer meets ISO 9001:2008 standards and comes with a 2-year warranty. The company designs and manufactures laboratory analytical instruments like pH meters, conductivity meters, electrodes, and buffer solutions for over 25 years.

• Stirring speed can be saved and recalled, so you won't lose the exact stirring speed you need any more
• IP54 waterproof and dustproof housing with transparent coping design
• Powered by AC/DC adapter or 4 AA batteries, suitable for indoor/outdoor use
• Comes with complete accessories, including magnetic stirring bars, holder, electrode clamp, batteries, and power adaptor
• Meets ISO 9001:2008 standards and comes with a 2-year warranty

PH60 Premium pH Tester by Apera

The Apera Instruments PH60 Tester is the new generation premium pH tester for all kinds of regular aqueous solution's testing, such as hydroponics, aquaculture, pools & spas, water treatment, cooling towers, etc. Features ACCURATE, QUICK & RELIABLE measurements. Besides the regular glass bulb probe, there are 3 other types of replaceable probes for your choice to meet your specific testing needs.

Up to 3 points (4.00, 7.00, 10.01) of Auto Calibration with auto buffer recognition and 0 to 50°C Auto Temperature Compensation (ATC), ±0.01 pH, 0.5°C accuracy with -2.00 to 16.00 pH measuring range, auto recognition and reminders of stable values improves consistency, saving you the trouble of guessing when to manually hold measurement (auto hold function available).

Equipped with a large clear LCD with 3 backlit color (blue for measuring mode, green for calibration mode, red for heads-up), it supports dual display of temp./pH value and indications of completed calibrations (where L/M/H indicate 3 points of calibrations) and stable readings (with a smiley face).

Unique High/Low Value Heads-Up function: the screen will turn red if measurement is higher/lower than a preset value, instantly reminding you of any results that need your attention.

Great value---Comes with a complete kit of premixed calibration solutions (4.00 and 7.00), soaking solutions (3M KCL), calibration bottles, AAA batteries, and a lanyard all in a portable carrying case.

Easy menu setting, customizing your tester's functions according to your needs. Smart self-diagnosis, warning of out-of-range measurement and incorrect calibrations. IP67 waterproof and dustproof, floating on water so you don't have to worry if it falls into water by accident. 2000 hours' continuous operation (without backlit) powered by AAA batteries (with low power warning and auto power off in 8 min if no operation).

The meter is CE certified and comes with a 2-YEAR Warranty (6 months for the probe). The company designs and manufactures scientific analytical instruments like meters and sensors for pH, conductivity, turbidity, and dissolved oxygen for over 25 years, and meets ISO 9001:2008 Standards.

• Easy Auto Calibration with buffer recognition; Auto Temp. Compensation (ATC) ensures accuracy in variant temperatures (0-50.0°C); Accuracy: ±0.01 pH, 0.5°C, Range: -2.00 to 16.00 pH
• 3 types of replaceable probes for your choice, aiming at pH measurements for different substances.
• AUTO recognition of stable values (optional Auto HOLD function available) improves consistency so you don t have to guess when to manually hold measurement
• LARGE CLEAR LCD with 3 backlit color (indicating 3 different modes), dual display of temp./pH, and REMINDERS of completed calibrations and stable readings
• COMPLETE KIT with READY-TO-USE calibration solutions, calibration bottles, storage solutions, AAA batteries, and a lanyard all in a premium portable carrying case

LabSen 823 Glass Combination pH/Temp. Electrode for Dairy Products and Liquid Food by Apera

Backed by proprietary Swiss sensor technologies and materials, the LabSen® 823 Glass Combination pH/Temperature Electrode/Probe is designed for testing pH for dairy products such as milk, cream, yogurt, and other liquid food such as mayonnaise, jam, BBQ sauce, syrup, etc.

Silver Ion Trap Reference System+Protelyte Electrolyte - The LabSen 823 pH/Temperature Electrode/Probe adopts a Silver Ion Trap reference system and Protelyte reference solution. On top of the Long-Life reference system, a silver ion trap is added to prevent the junction from being blocked or contaminated by proteins.

LabSen unique blue hemispherical glass membrane - faster response time, better repeatability, and built tough, highly resistant to general impact (totally differentiates from the traditional fragile glass bulb membrane); and can be tested in high-temperature samples (up to 225°F).

Patented pH/Temperature combination structure - The temperature element is placed in an independent cavity under the pH glass membrane. With the built-in heat conducting medium, the temperature sensing speed can be increased by 40%, hence the response time and stability of the pH electrode are greatly improved.

Compatible with Apera Instruments' meters such as PH700, SX823-B, MP511, PH800, and PC800. May NOT work with other brands' meters because the temperature unit might be incompatible.

The electrode is backed up with a 6-month warranty by Apera Instruments.

• Proprietary pH sensor technology and materials from Switzerland
• Designed for milk and other liquid food that contain proteins
• Silver Ion Trap Reference System + Protelyte reference solution, preventing the electrode from being contaminated by proteins
• Patented pH/Temperature combination structure, increasing the temperature response time by 40% compared to a conventional isolated built-in thermistor
• Unique LabSen hemispherical glass membrane, which has a faster response rate, better repeatability, and built tough

AI802G GS2-E Replacement EC Probe for GS2 EC/ppm Pen by Apera

Built with the Swiss spear glass membrane and anti-contamination PTFE junction, GS2-E spear pH probe is designed for high-accuracy direct soil pH measurement.

Also works well with other soft solid samples such as fruits, meats, cheese, etc. and general water solutions.

This probe is compatible with the following Apera tester models:

• GroStar GS1, GS2, GS4
• PH60, PH60F, PH60S, PC60
• PH60-Z, PH60F-Z, PH60S-Z, PC60-Z

PH60F Premium pH Pocket Tester for Surface Testing by Apera

The Apera Instruments PH60F Pocket pH Tester simply tests ph level for skin, fabrics, paper, and other surface in an ACCURATE, QUICK, & REILABLE manner (Also works great for regular aqueous solution's pH testing). The flat probe has a Triple-Junction structure that prevents clogging, and is replaceable.

Up to 3 points (4.00, 7.00, 10.01) of Auto Calibration with auto buffer recognition and 0 to 50°C Auto Temperature Compensation (ATC), ±0.01 pH, 0.5°C accuracy with -2.00 to 16.00 pH measuring range, auto recognition and reminders of stable values improves consistency, saving you the trouble of guessing when to manually hold measurement (auto hold function available).

Equipped with a large clear LCD with 3 backlit color (blue for measuring mode, green for calibration mode, red for heads-up) supports dual display of temp./pH value and indications of completed calibrations (where L/M/H indicate 3 points of calibrations) and stable readings (with a smiley face).

Unique High/Low Value Heads-Up function: the screen will turn red if measurement is higher/lower than a preset value, instantly reminding you of any results that need your attention.

Great value---Comes with a complete kit of premixed calibration solutions (4.00 and 7.00), soaking solutions (3M KCL), calibration bottles, AAA batteries, and a lanyard all in a portable carrying case.

Easy menu setting, customizing your tester's functions according to your needs. Smart self-diagnosis, warning of out-of-range measurement and incorrect calibrations. IP67 waterproof and dustproof, floating on water so you don't have to worry if it falls into water by accident. 2000 hours' continuous operation (without backlit) powered by AAA batteries (with low power warning and auto power off in 8 min if no operation).

The meter is CE certified and comes with a 2-YEAR Warranty (6 months for the probe). The company designs and manufactures scientific analytical instruments like meters and sensors for pH, conductivity, turbidity, and dissolved oxygen for over 25 years, and meets ISO 9001:2008 Standards.

• Easy-to-install Replaceable FLAT sensor, Triple-Junction structure prevents clogging, designed for Skin, Fabrics, Paper, and other flat surface pH testing, also works great for micro-volume and regular liquid pH measurement
• Easy Auto Calibration with auto buffer recognition (1 to 3 points); Auto Temperature Compensation (ATC)
• Unique High/Low Value HEADS-UP function, instantly reminding you of any results that need your attention with a red backlight
• LARGE CLEAR LCD with 3 backlit color (indicating 3 different modes), DUAL display of temp./pH, and REMINDERS of completed calibrations and stable readings
• COMPLETE Kit with READY-TO-USE calibration buffer solutions, calibration bottles, storage solutions, AAA batteries, and a lanyard all in a portable carrying case

AI101G GS1 pH Pen Tester Kit by Apera

GroStar® Premium Pen Testers are designed specifically for the horticultural market. GroStar's intelligent design reduces the guesswork so you can easily manage your crops success.

Features of GS1 Premium pH Pen:

• Measures pH and temperature
• Premium probe technologies and materials ensure high accuracy and durability with minimal maintenance
• Easy-to-use design and fast calibration adjustment
• Double junction replaceable probe, so you don't have to discard the entire pen when the probe reaches its end of life
• Large 3-color backlit screen gives you clear information
• IP67 waterproof rating
• Powered by AAA batteries with auto off function
• Automatic temperature compensation

Includes:

• 2-year warranty (instrument)
• 1-year warranty (probe)
• pH 7 & pH4 calibration solution (50ml bottle each)
• KCL storage solution (10ml bottle)
• Lanyard and user manual

AI103G GroStar GS3 EC/500ppm/700ppm Pen Tester Kit by Apera

GroStar® Premium Pen Testers are designed specifically for the horticultural market. GroStar's intelligent design reduces the guesswork so you can easily manage your crops success.

Features of GS3 Premium EC Pen:

• Measures conductivity EC, PPM (500), PPM (700) and temperature
• Premium probe technologies and materials ensure high accuracy and durability with minimal maintenance
• Titanium alloy sensor designed for high accuracy EC measurement
• Easy-to-use design and fast calibration adjustment.
• Large 3-color backlit screen gives you clear information
• IP67 waterproof rating
• Replaceable probe
• Powered by AAA batteries with auto off function
• Automatic temperature compensation

Includes:

• 2-year warranty (instrument)
• 1-year warranty (probe)
• 2.77 EC standard calibration solution (50ml bottle)
• Lanyard and user manual

AI3101 LabSen 211 Glass-body pH Electrode for General Water Solutions (TRIS compatible) by Apera

Built with proprietary sensor technology and materials from Switzerland, Apera LabSen 211 pH Electrode is ideal for professional lab and field pH measurement of general water solutions.

LabSen S-type hemispherical glass membrane - low resistance and high firmness, rendering fully stabilized readings in 15 to 30 seconds, and is yet 10 times stronger than traditional glass membranes, highly resistant to general impact, eliminating the chance of accidental breakage.

Long-Life Reference System - composed of a glass tube, AgCl, and a reference silver wire. The top end of the slim glass tube is stuffed with cotton, which prevents the reaction between AgCl and electrolyte when the temperature changes. It improves the stability of reference electrode and extends the service life of the electrode.

The electrode uses a standard BNC connector, compatible with any pH meters that use BNC connectors. No temperature sensor is built-in. Users need to have a separate temperature probe (ex: Apera MP500) to enable ATC or manually input temperature to achieve temperature compensation.

• Proprietary sensor technology and premium materials from Switzerland
• Built with LabSen S-type hemispherical glass membrane, featuring low resistance (fast response) and high firmness
• No more air bubbles inside the glass membrane thanks to the Swiss blue gel electrolyte.
• Long-Life Reference System improves the stability of reference electrode and extends the service life of the electrode
• Compatible with TRIS buffers

AI3109 LabSen 831 Glass-body pH Electrode for Strong Acid Samples and HF (Hydrofluoric) Acid by Apera

Built with proprietary sensor technology and premium materials from Switzerland, Apera LabSen 831 HF pH Electrode is designed for professional pH measurement of solutions containing HF (Hydrofluoric) acid, and other strong acidic solutions.

LabSen HF glass membrane - designed for accurate measurement in strong acid samples, and is resistant to hydrofluoric corrosion, good for 1000 times of measurement (measurement time<1 minute, and HF concentration should be less than 0.1mol/L or 0.2% wt%)

Built tough - The hemispherical glass membrane is 10 times stronger than traditional glass membranes, and highly resistant to general impact, saving the electrode from accidental damage.

Silver Ion Trap Reference System - On top of the Long-Life reference system, a silver ion trap is added to further prevent junction clogs.

The electrode uses a BNC connector, compatible with any pH meters that use BNC connectors. No temperature sensor is built-in. Users need to have a separate temperature probe (ex: Apera MP500) to enable ATC or manually input temperature to realize temperature compensation.

• Proprietary pH sensor technology and premium materials from Switzerland
• LabSen HF glass membrane designed for accurate measurement in strong acid samples, and is resistant to hydrofluoric corrosion
• Silver Ion Trap Reference System
• LabSen's sturdy glass membrane is 10 times stronger than traditional glass membranes
• The blue gel electrolyte eliminates the chance of any air bubbles inside the sensor

802 Heating Magnetic Stirrer/Stir Plate by Apera

The Apera Instruments 802 Heating Magnetic Stirrer is designed to perform safe and reliable heated stirring with easy-to-use functions and features. Suitable for small volume sample (up to 1000ml) solution's heated stirring. The overheating protection makes sure the stirrer stops heating when the surface temperature exceeds 150°C. The ceramic heating unit heats the surface to 120°C within 5 minutes. Good insulation and long service life. It adopts the heat-resistant housing, which is made with mirror-style stainless steel, making it highly resistant to pollution and chemical erosion. The powerful heat-resistant magnetic steel prevents stir bars from bouncing, and even enables low viscosity solutions' stirring.

• Safe, Reliable & Economical choice for a small heating stirrer
• Smooth speed control (0 to 2300 RPM, Max. stirring capacity: 1000ml)
• Heating the stirring surface to 120°C (248°F) within 5 minutes at fixed power
• The overheating protection makes sure the heating stops when the surface temperature exceeds 150°C (302°F)
• Two-year warranty and CE Certified

EC60 Premium EC/TDS/Salinity Pocket Tester by Apera

The Apera Instruments EC60 Pocket EC/TDS/Salinity Tester simply tests all kinds of regular EC measurements in an ACCURATE, QUICK, and RELIABLE manner. The applications include hydroponics, tap/drinking water, pools & spas, education, water treatment, environmental monitoring, etc. Up to 3 points of Auto Calibration with auto buffer recognition and 0 to 50°C Auto Temperature Compensation (ATC), 0.01 mS/±1% F.S, 0.5°C accuracy with measuring range of 0-200.0 μS/cm, 0-2000 μS/cm, 0-20.00 mS/cm, 0-50.0°C.

APERA's unique BPB (Brush-Resistant Platinum Black) sensor adopts a special processing technology, which minimizes electrode polarization, expands measuring range, and increases firmness of the electrode, hence ensuring a much higher accuracy and consistency in a wide-range conductivity measurement than traditional stainless steel electrodes, and is easy to clean. The probe is replaceable and easy to install so that you don't have to buy a whole new meter once the probe retires.

Auto recognition and indication of stable values improves consistency, saving you the trouble of guessing when to manually hold measurement. With an large clear 180° viewing angle screen with 2 backlit color (blue for measuring mode and green for calibration mode), it supports dual display of temp./EC value and indications of completed calibrations (where M/H indicate 2 points of calibrations) and stable readings (with a smiley face).

Easy menu setting, customizing your tester functions according to your needs (switch of temperature unit, TDS factor setting, Switch of salinity unit, auto hold on/off). Smart self-diagnosis, warning of out-of-range/preset measurement and incorrect calibrations.

Comes with a complete kit. IP67 waterproof and dustproof, floating on water. 1000 hours' continuous operation powered by AAA batteries (with low power warning and auto power off in 8 min if no operation).

Warranty: 2 years for the meter, 6 months for the probe.

• APERA's unique Replaceable BPB (Brush-resistant Platinum Black) probe ensures high accuracy and consistency in a wide-range conductivity measurement
• EASY Auto Calibration with auto buffer recognition; Auto Temp. Compensation (ATC) ensures accuracy in variant temperatures (0-50.0°C)
• LARGE CLEAR LCD with 2 backlit color (indicating 2 different modes), DUAL Display of temp./EC, and indications of completed calibrations and stable readings
• EASY Switch from EC to TDS/Salinity with customizable TDS factor (0.40-1.00)
• Complete kit with ready-to-use calibration solutions, calibration bottles, AAA batteries, and a lanyard all in a portable carrying case

EC60-Z Smart Pocket Conductivity/TDS/Salinity/Resistivity Tester Kit by Apera

• The next-generation water tester designed for seamless water test experience. Professional measurements for conductivity (EC), TDS (ppm), salinity (ppt), resistivity, and temperature now become easier than ever.
• Just connect the tester to your smartphone via Bluetooth in the ZenTest mobile App (Free download in iOS App Store/Google Play Store), the step-by-step smart guide will lead you to become a water test professional with just a few taps.
• Save and share your measurement and calibration data right on the palm of your hand via email. Data will never get lost thanks to the cloud-based data system

F501-S 3-in-1 Fluoride Electrode (built-in temperature sensor) by Apera

The F501-S Fluoride Ion Electrode is the replacement electrode for Apera Instruments WS100/WS200 Fluoride Meter. It's featured with a 3-in-1 combination structure, which provides a convenient user experience and reliable measuring performance. Connector: 8-pin; Cable length: 3 ft.

LabSen 213 Glass Combination pH/Temp. Electrode for General Water Solutions (TRIS compatible) by Apera

Backed by proprietary Swiss sensor technology and materials, the Apera Instruments LabSen® 213 Glass 3-in-1 pH/Temp. Electrode is designed for general water solutions in scientific research and quality control. This electrode is compatible with TRIS buffer solutions.

LabSen® unique blue hemispherical glass membrane - faster response time, better repeatability, and built tough, highly resistant to general impact (totally differentiates from the traditional fragile glass bulb membrane); and can be tested in high-temperature samples (up to 225°F).

Long-Life Reference System - composed of a glass tube, AgCl, and a reference silver wire. The top end of the slim glass tube is stuffed with cotton, which prevents the reaction between AgCl and electrolyte when the temperature changes. It improves the stability of the reference electrode and extends the service life of the electrode.

The patented pH/Temperature combination structure - The temperature element is placed in an independent cavity under the pH glass membrane. With the built-in heat-conducting medium, the temperature sensing speed can be increased by 40%, hence the response time and stability of the pH electrode are greatly improved.

Compatible Apera Instruments' meters: PH700, SX823-B, MP511, PH910, PH950, PH850, PH8500, PH820. May NOT work with other brands' meters because the temperature unit might be incompatible.

The electrode is backed up with a 6-month warranty fulfilled by Apera Instruments.

• Proprietary pH sensor technology and materials from Switzerland
• Unique LabSen® blue hemispherical glass membrane - fast response rate and impact-resistant
• Patented pH/Temperature combination structure, increasing the temperature response time by 40% compared to a conventional isolated built-in thermistor
• Say goodbye to air bubbles inside the bulb thanks to the Swiss blue inner gel solution.
• Long-Life Reference System, improving the stability of the reference electrode and prolong the service life of the electrode

LabSen 231 Glass-body pH Electrode for Wastewater, Suspension, Emulsion by Apera

Backed by proprietary Swiss sensor technology and materials, the LabSen 231 Combination pH Electrode is ideal for testing emulsion, suspension, wastewater, and samples containing protein and sulfide. Its 2-pore double junction structure and solid electrolyte make it hard to be contaminated and highly resistant to compression.

• Long-Life Reference System - The LabSen 231 pH electrode adopts a long-life reference system, which is composed of a glass tube, AgCl and a reference silver wire. The top end of the slim glass tube is stuffed with cotton, which prevents the reaction between AgCl and electrolyte when the temperature changes. It improves the stability of reference electrode and extends the service life of the electrode.
• Polymer Electrolyte - The polymer electrolyte is in direct contact with test samples. The anti-pressure capacity can reach up to 6 bars, making it ideal for testing suspension and wastewater.
• Special Glass Membrane - The LabSen 231 pH electrode adopts a hemispherical glass membrane, which is highly resistant to general impact (the traditional glass bulb membrane is a lot more fragile), and can be tested in high-temperature samples (up to 176°F).

LabSen 333 POM Combination pH/Temp. Electrode for Wastewater Treatment by Apera

Backed by proprietary Swiss pH sensor technology and materials, the LabSen® 333 3-in-1 pH/Temp. The electrode is temperature compensated pH electrode and is designed for testing wastewater, emulsion, suspension, and samples containing protein and sulfide (This is a replacement probe for Apera Instruments SX811-WW Portable pH Meter for Wastewater).

LabSen unique blue hemispherical glass membrane - faster response time, better repeatability, and built tough, highly resistant to general impact (totally differentiates from the fragile conventional glass bulb membrane).

Long-Life Reference System - The LabSen 333 pH electrode adopts a long-life reference system, which is composed of a glass tube, AgCl, and a reference silver wire. The top end of the slim glass tube is stuffed with cotton, which prevents the reaction between AgCl and electrolyte when the temperature changes. It improves the stability of reference electrode and extends the service life of the electrode.

Polymer Electrolyte - The solid polymer electrolyte is in direct contact with test samples. The anti-pressure capacity can reach up to 6 bars, making it ideal for testing suspension and wastewater. No more frustrating clogged junctions.

Compatible with Apera Instruments' meters such as PH700, SX823-B, MP511, PH800, PC800. May NOT work with other brands' meters because the temperature unit might be incompatible.

The electrode is backed up with a 6-month warranty fulfilled by Apera Instruments.

• Unique LabSen blue glass membrane from Switzerland, faster response rate, better repeatability, and impact-resistant
• Polymer Electrolyte, ideal for testing wastewater and suspension. No more clogged junction.
• Long-Life Reference System, improving the stability of reference electrode and prolong the service life of the electrode
• POM housing, highly resistant to corrosions

LabSen 821 Glass-body pH Electrode for Dairy Products and Liquid Food by Apera

Backed by proprietary Swiss sensor technologies and materials, the LabSen® 821 Combination pH Electrode/Probe is designed for testing the pH for dairy products such as milk, cream, yogurt, and other liquid food such as mayonnaise, jam, BBQ sauce, syrup, etc.

Silver Ion Trap Reference System+Protelyte Electrolyte - The LabSen® 821 pH Electrode/Probe adopts a Silver Ion Trap reference system and Protelyte reference solution. On top of the Long-Life reference system, a silver ion trap is added to prevent the junction from being blocked or contaminated by proteins.

LabSen unique blue hemispherical glass membrane - faster response time, better repeatability, and built tough, highly resistant to general impact (totally differentiates from the traditional fragile glass bulb membrane); and can be tested in high-temperature samples (up to 225°F).

The electrode uses a BNC connector, compatible with any pH meters that use BNC connectors, such as Apera Instruments MP511, PH850, PH8500, PH700, PH910, PH950, PH820 and PC820. The temperature sensor is not built-in. Users need to have a separate temperature probe (ex: Apera Instruments MP500) to enable ATC or manually input temperature to realize temperature compensation.

The electrode is backed up with a 6-month warranty by Apera Instruments.

• Proprietary pH sensor technology and materials from Switzerland
• Designed for milk and other liquid food that contain proteins
• Unique LabSen® hemispherical glass membrane, which has a faster response rate, better repeatability, and built tough
• Silver Ion Trap Reference System + Protelyte reference solution, preventing the electrode being contaminated by proteins
• Standard BNC Connector

LabSen 841 Glass-body pH Electrode for Strong Base Solutions by Apera

Backed by proprietary Swiss sensor technology and materials, the LabSen® 841 Glass Combination pH Electrode/Probe is designed for pH measurements for strong base solutions (10-14 pH).

Special Glass Membrane - The LabSen 841 pH Electrode/Probe adopts a special H glass membrane, which has better accuracy and repeatability in strong base solutions; the hemispherical sensor is also built tough and highly resistant to general impact (completely different from the traditional fragile glass bulb membrane).

Silver Ion Trap Reference System - The LabSen 841 pH Electrode/Probe adopts a Silver Ion Trap reference system. On top of the Long-Life reference system, a silver ion trap is added to prevent the junction from being blocked by silver sulfide.

The electrode uses a BNC connector, compatible with any pH meters that use BNC connectors, such as Apera Instruments MP511, PH850, PH8500, PH700, PH800, PC800, PH820 and PC820. The temperature sensor is not built-in. Users need to have a separate temperature probe (ex: Apera Instruments MP500) to enable ATC or manually input temperature to realize temperature compensation.

The electrode is backed up with a 6-month warranty by Apera Instruments.

• Proprietary pH sensor technology and materials from Switzerland
• Unique LabSen® H glass membrane, which has a faster response rate, better repeatability in strong base solutions (10-14 pH)
• Silver Ion Trap Reference System - On top of the Long-Life reference system, a silver ion trap is added to prevent the junction being blocked by silver sulfide
• Standard BNC Connector
• 6-Month Warranty fulfilled by Apera Instruments