Sensorex pH Lab Sensors
pH, commonly used for water measurements, is a measure of acidity and alkalinity, or the caustic and base present in a given solution. It is generally expressed with a numeric scale ranging from 0-14. The value 7 represents neutrality. The numbers on the scale increase with increasing alkalinity, while the numbers on the scale decrease with increasing acidity.
Each unit of change represents a tenfold change in acidity or alkalinity. The pH value is also equal to the negative logarithm of the hydrogen-ion concentration or hydrogen-ion activity. pH values for some common solutions are listed in the table to the right.
pH3400
pH Electrode, Glass, Research Grade
In laboratory environments such as medical, biological, and materials science research groups, samples and test conditions are constantly changing, but accuracy is always critical. The pH3400 is a highly versatile glass combination pH electrode, specially designed to respond quickly and accurately to rapid temperature changes. The high sensitivity internals allow testing of low ionic samples. Safely measure samples containing heavy metals, TRIS buffer, or proteins thanks to the double junction reference design, which prevents fouling. Even test highly reactive chemicals: with a glass body, the pH3400 is inert to a wide range of chemical reactions. Sensorex RapidRenew reference design flushes away contaminants that might build up and slow response.
- Our most sensitive laboratory electrode: accurate to 0.04 pH in tests across full recommended temperature range
- Easily maximize measurement repeatability: Rapid renew reference system for quick refilling
- Safe for use with reactive chemicals: Glass bodies are inert to many chemical reactions
- Ideal for difficult sample types: Double junction reference protection for testing samples containing heavy metals, TRIS buffer, and other contaminants
- Ready for wet or corrosive environments: BNC boot protects meter connection
Recommended for: Low ionic samples, medical and pharmaceutical research, biological samples (including TRIS buffer), samples containing heavy metals.
pH3000
pH Sensor, Research-Grade. Refillable
When accuracy and repeatability are critical, such as in pharmaceutical or drinking water applications, the ideal pH electrode will quickly deliver stable measurements. The pH3000 is a research grade pH meter replacement probe specially designed to respond quickly and accurately to rapid temperature changes. The high sensitivity internals also make these electrodes the best choice for low ionic samples. The double junction reference design prevents contamination, allowing pH testing in samples containing heavy metals, proteins and enzymes, or TRIS buffer.
- Our most sensitive laboratory electrode: accurate to 0.04 pH in tests across full recommended temperature range
- Easily maximize measurement repeatability: Rapid renew reference system for quick refilling
- Extensive chemical compatibility: Constructed with durable Ultem®, proven in a range of chemical conditions
- Ideal for difficult sample types: Double junction reference protection for testing samples containing heavy metals, TRIS buffer, and other contaminants
- Virtually unbreakable: removable bulb guard protects pH glass and strain relief prevents damage to cable connection
- Ready for wet or corrosive environments: BNC boot protects meter connection
- Compatible with various meters: Versatile replacement probe works with any meter accepting a BNC pH probe
Recommended for: Low ionic samples, medical and pharmaceutical research, biological samples, samples containing heavy metals.
S1010CD
pH Electrode, Research-Grade, Sealed
In research studies or development applications where heat, moisture, or corrosive chemicals may damage equipment, pH probe durability is key. The S1010CD is durable inside and out. All the functional components – the pH glass, the meter connection, and the cable connection – are reinforced with protective elements. A double junction reference prevents contamination by heavy metals, proteins, TRIS buffer, and other contaminants.
- Our most sensitive laboratory pH probe: accurate to 0.04 pH in tests across full recommended temperature range
- Extensive chemical compatibility: Constructed with durable Ultem, proven in a range of chemical conditions
- Ideal for difficult sample types: Double junction reference protection for testing samples containing heavy metals, TRIS buffer, and other contaminants
- Virtually unbreakable: removable bulb guard protects pH glass and strain relief prevents damage to cable connection
- Minimal maintenance: Sealed reference design does not require solution refilling
- Ready for wet or corrosive environments: BNC boot protects meter connection
pH2100
pH Electrode, Flat Tip
Agar plates, skin, and electrophoresis gels are all surfaces that may be difficult to measure with a typical pH glass bulb due to concerns about breakage. To facilitate these and other surface measurements, we created the pH2100 flat tip pH electrode. It has a rugged flat measurement surface, which breaks less easily when it comes in contact with hard materials. This makes it a great choice for measuring slurries, sludges, and viscous samples as well as those containing suspended solids.
- Ideal for surface measurements and slurries: rugged flat measurement tip resists breakage
- Great for testing unknown sample types: double junction electrode reference design prevents contamination
- Durable and Versatile: Ultem® body offers enhanced chemical compatibility and booted BNC protects meter connection
- No maintenance required: sealed gel filled reference design
- One year limited warranty
pH2400
pH Electrode, Glass, Extended Life
Environmental, wastewater, and other sampling applications may expose electrodes to unknown contaminants. Over time, exposure to contaminants such as heavy metals and reactive chemicals, will take a toll on a sensor’s functional components. The best sensors for these types of applications are built to safely handle contaminants to maximize working lifetime. Our pH2400 is a glass electrode with double junction reference design to prevent fouling by sample contaminants that interact with Silver (Ag). The refillable reference junction allows users to replace the liquid fill solution as it becomes depleted or contaminated, instead of replacing the whole sensor.
- Accurate measurements across full pH scale (0-14)
- Maximum chemical compatibility: glass electrode bodies are inert to most reactions
- Extended lifetime: Refillable reference junction allows sensor maintenance, saving replacement costs
- Great for wet or corrosive environments: BNC boot protects meter connection
- Compatible with any meter accepting BNC
- Instantly ready for use: Shipped in storage bottle for long shelf life – guaranteed for one year
- One year limited warranty
pH1400
pH Electrode, Glass, Light Duty
Whether you are a student measuring pH in a lab or a business owner monitoring plant or crop health, you need a pH probe that will consistently deliver accurate measurements. If you deal with a wide variety of chemicals or any aggressive substances, a glass pH probe like our pH1400 is a safe choice due to the chemically inert properties of glass. This basic, single junction electrode has a refillable reference cell, allowing users to maintain measurement precision throughout instrument lifetime.
- Accurate measurements across full pH scale (0-14)
- Easily maximize measurement repeatability: refillable reference cell with liquid solution
- Maximum chemical compatibility: glass probe body is inert to most reactions
- Compatible with a variety of pH meters: use this probe with any pH meter accepting BNC
- Instantly ready for use: Shipped in storage bottle for long shelf life – guaranteed for one year
- One year limited warranty
pH2000
pH Sensor, Laboratory, Extended Life
Applications such as environmental and wastewater sampling involve some uncertainty about what samples may contain. When dealing with unknown or unpredictable sample types, you need a durable pH probe you can trust to deliver accurate measurements regardless of the contaminants you encounter. The pH2000 has a double junction reference design to prevent reference fouling by heavy metals and other sample contaminants. When you travel to remote sites to collect data, it is especially important that obtaining the measurements you need is hassle free. The pH2000 features an Ultem® body and a booted meter connection for durability in the field. The sealed reference design requires no maintenance. Compatible with any meter accepting a BNC connector.
- Durable and low maintenance: Ultem® body construction, reinforced meter connection, and sealed reference design
- Great for testing unknown sample types: Double junction reference protection prevents reference cell contamination
- Accurate measurements across full pH scale (0-14)
- Instantly ready for use: Shipped in storage bottle for long shelf life – guaranteed for one year
- Compatible with any meter accepting a BNC connector
- One year limited warranty
pH1600
Laboratory pH Electrode
The Sensorex pH1600 is one of our most popular laboratory pH electrodes, due to its reliability and low maintenance design.
- Durable and chemically compatible Ultem® body
- Reliable and accurate over the full range of pH measurements
- No refilling or maintenance required with sealed gel-filled design
- Instantly ready for use, and has one year guaranteed shelf life
- One year limited warranty
pH1000
pH Sensor, Polycarbonate Laboratory
Whether you need to measure pH in your swimming pool, aquarium, or hydroponics garden, you need a probe that will deliver accurate measurements day in and day out. This low maintenance, low cost pH sensor provides reliable readings in a range of environments, from greenhouses to science classrooms. This sensor stands up to the usual wear and tear with its durable polycarbonate body and built-in protection for the pH glass measuring surface. Compatible with all pH meters accepting a BNC connector.
- Very fast response time: Platinum measurement surface for fast response time and stable readings
- No maintenance required: Sealed, no maintenance reference design
- Durable construction: Polycarbonate body is built for frequent lab or field use
- Instantly ready for use: Shipped in storage bottle for long shelf life – guaranteed for one year
- One year limited warranty
S450CD/FC40
pH Detector Kit for HPLC, FIA, IEF
The pH Detectors are designed for use with a variety of instrumental techniques such as FIA, HPLC and IEF and are also used to continuously monitor the pH of low volume flows in bench scale chemical systems. The pH detector system is specially designed to achieve ultra fast response times. A flat surface pH electrode (S450CD) located at the top of the flow cavity allows for very low internal volumes. The resulting rectangular cross-section flow path has no protruding parts which could interfere with a clean sweeping flow.
- pH Detector system for HPLC, FIA, and IEF applications
- Perfect for low volume flow measurements
- Ultra fast response time
- Flow cell and inlet/outlet fittings included
pH2500
pH Electrode, Flat Surface Glass
Surfaces like paper, leather, electrophoresis gels and agar plates may be difficult to measure with traditional pH glass bulbs due to concerns about breakage. A flat electrode like our pH2500, is ideally suited for these types of pH measurements as well as measurements of suspended sludges and slurries. In addition to its specially designed measurement surface, the pH2500 features double junction construction, which prevents contamination and allows testing of samples containing heavy metals or proteins.
- Perfect for gels and slurries: Flat electrode measurement surface designed for testing special sample types
- Accurate measurements across full pH scale (0-14)
- Highly adaptable: Compatible with any pH meter accepting BNC
- Low maintenance: Gel-filled electrode reference design with double junction to prevent contamination
- Instantly ready for use: Shipped in storage bottle for long shelf life – guaranteed for one year
- One year limited warranty
S450
pH Probe, Flat Surface
The S450C and S450CD are flat surface pH probes designed for use in low volume flow applications. These probes are commonly used as part of a pH detector system in laboratory applications such as high pressure liquid chromatography. Available in a cost effective single junction design or with a double junction design for measuring solutions containing compounds that react with silver (Ag).
- Perfect for low volume flow measurements
- Commonly used as part of a pH detector system
- Available with single or double junction design
- Use with any pH/mV meter accepting a BNC connector
pH2200
pH Sensor, Spear Tip
Looking to measure the pH of soil, meat, or cheese? A standard pH sensor with bulb shaped glass won’t effectively pierce the surface of these semi-solids; the pH glass may even crack. That’s why we’ve created the pH2200 spear tip pH sensor, specially designed to penetrate semi-solid surfaces for effective pH measurement. The sensor is assembled with a bio-friendly Ultem® body, making it safe for use in food and soil. Use this durable pH sensor at home or in the field with any pH meter accepting a BNC connector.
- Rugged spear tip measurement surface for piercing semi-solid samples
- Bio-friendly Ultem® body for safe measurements in food and soil
- Long-lasting with built-in protection against protein contamination
- No refilling or maintenance required with sealed gel-filled design
- Instantly ready for use and shipped in storage bottle for long shelf life
Replacement 3-in-1 pH/Reference/Temperature Electrodes
Finding 3-in-1 electrodes for older meters can be a challenge. Sensorex 3-in-1 combination electrodes are excellent choices for applications requiring pH, reference, and automatic temperature compensation (ATC). The 3-in-1 electrode operates like three separate electrodes, at a value price, you would pay for only one electrode.
These electrodes are designed to retrofit the original factory electrodes supplied with your meter but at substantial savings. Built into the body is an ATC element compatible with your meter. Combine the ATC element with the Sensorex durable and proven epoxy body pH electrode and you will get a premium quality direct fit: a 3-in-1 replacement pH electrode.