Sensorex pH Measurement
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.
S272CD
Process pH Sensor
The S272CD online process pH sensor delivers reliable online monitoring for in-line or submersion installation configuration. This sensor is designed to extend sensor lifetime with double-junction technology and a durable Ryton® PPS body. Minimal maintenance required due to flat glass measurement surface. A versatile sensor for moderate and multi-purpose applications.
- Reliable performance in demanding applications: Liquid flow naturally cleans the flat pH measurement surface
- Extended sensor lifetime: Double junction technology extends sensor lifetime by preventing reference contamination
- Versatile design for many applications: 3/4″ NPT threads on both ends for submersion or in-line mounting
- One year limited warranty
S8000CD
pH Sensor Cartridge for S8000 Series pH Kits, Quick Change
Our S8000 series of pH deliver the most reliable online pH monitoring in a unique, modular package that minimizes total cost of ownership. This replacement pH sensor cartridge can be changed in a few seconds with no tools or re-wiring required. Extended sensor lifetime with ERP Reference System.
- Reliable performance in demanding applications: Liquid flow naturally cleans the flat pH measurement surface
- Lightning fast sensor changes: Modular design allows replacement cartridges to be changed in seconds without tools
- Extended sensor lifetime: ERP Reference System for reference protection against contamination
- Low total cost of ownership: All mounting hardware is reuseable. Only replace the quick-change sensor cartridge
- One year limited warranty
GT100-series
Glass Body General Purpose Process pH Electrodes
- Maximum chemical compatibility with inert glass bodies double-junction refernce and PTFE junction
- Detachable cables: Models for S8 and VP connectors
- Choose single- or double-junction
- Accurate and reliable measurements across full pH scale (0-14)
- Instantly ready for use: Extended shelf life (guaranteed for one year)
GT200- and GT300-series
Glass Body High Temperature Process pH Electrodes
- Maximum chemical compatibility with inert glass bodies double-junction reference and PTFE junction
- Detachable cables: Models for S8 and VP connectors
- Choose 120 mm or 225 mm length
- Accurate and reliable measurements across full pH scale (0-14)
- Instantly ready for use: Extended shelf life (guaranteed for one year)
S8300
Modular pH Sensors for In-line
In heavily contaminated wastewater or chemical processing applications, an inline pH probe typically wears out fast. Constantly replacing an inline pH probe can feel like a waste of time and money. We created our modular, quick disconnect S8000 sensor packages for these types of heavy duty industrial applications. The sensor can be replaced in a few seconds with no tools or re-wiring required by swapping the S8000CD Quick Change Replacement Cartridge. Reuse the cable assembly and other mounting hardware for a low cost of ownership.
- Reliable performance in demanding applications: Liquid flow naturally cleans the flat pH measurement surface
- Lightning fast sensor changes: Modular design allows replacement cartridges to be changed in seconds without tools
- Perfect for pressurized applications: Sealed, no maintenance reference design
- Low total cost of ownership: All mounting hardware is reuseable. Just replace the quick-change sensor cartridge.
- One year limited warranty
S8100
Modular Submersion Process pH Sensors
The S8100 Online Process Submersion pH Sensor delivers the most reliable online pH monitoring in a unique, modular package that minimizes total cost of ownership. Order one of four configurations below or customize to exactly what you need for your application with separate modules in the related products area below. Sensors can be changed in a few seconds with no tools or re-wiring required by swapping the S8000CD Quick Change Replacement Cartridge.
- Reliable performance in demanding applications: Liquid flow naturally cleans the flat pH measurement surface
- Lightning fast sensor changes: Modular design allows replacement cartridges to be changed in seconds without tools
- Perfect for pressurized applications: Sealed, no maintenance reference design
- Low total cost of ownership: All mounting hardware is reuseable. Only replace the quick-change sensor cartridge
- One year limited warranty
SD7500CD
Differential pH Probe, Universal
Continuous online pH monitoring in wastewater and coating industrial applications leads to contamination, and eventually will require for sensors to be replaced. A differential pH sensor utilizes a measurement technique designed specifically to extend the working lifetime of sensors in a challenging application. Replacing the sensor reference (salt bridge) and buffered electrolyte solution can prevent sensor replacements, saving time and money. Our SD7500 Series features a combination sensor output; these differential pH sensors can be used with any conventional pH/ORP transmitter.
- Reliable measurement performance: True differential pH measurement technology uses solution ground
- Extended lifetime: Buffered electrolyte reference solution resists fouling
- High accuracy measurements: Differential measurements virtually eliminate ground loop measurement errors
- Use with any transmitter or controller: Self-powered unit is compatible with any conventional pH transmitter
- Resists aggressive chemicals: Constructed of durable Ryton® Polyphenylene Sulfide (PPS)
- Two Year limited Warranty
SD7000CD
Differential pH Probe, 5-Wire
Our SD7000 series of differential pH electrode offers unsurpassed pH measurement accuracy by minimizing reference junction fouling and eliminating ground loops. These units deliver greater reliability and less required maintenance than a conventional combination pH sensor. Extended sensor lifetime can be achieved by replacing the sensor reference (salt bridge). Reliably measures pH in environments with rapid temperature changes with built-in quick response automatic temperature compensation (ATC).
- Reliable measurement performance: True differential pH measurement technology using solution ground
- Direct-fit Compatibility: Replacement sensor for several popular Hach® & Water Analytics® models
- Perfect for pressurized applications: Sealed, no maintenance reference design
- Built for difficult applications: Constructed of chemically-resistant Ryton Polyphenylene Sulfide (PPS)
- Two year limited warranty
SD7420CD
Differential pH Probe, Direct 4-20mA Output
Applications such as pulp and paper or dye manufacturing and industrial wastewater treatment may expose pH probes to harsh conditions and chemicals. A differential pH probe utilizes a special measurement technique, which extends the working lifetime of the sensor in challenging applications. Replacing the sensor reference (salt bridge) and buffered electrolyte solution can extend working lifetime, which saves timely, costly replacements. Our SD7420CD features differential sensor technology with a direct 4-20mA output, so it can be integrated into control systems without the use of a transmitter or controller.
- Reliable measurement performance: True differential pH measurement technology using solution ground
- High accuracy measurements: Differential measurement technique virtually eliminates ground loop measurement error
- No transmitter or controller required: Direct 4-20mA output for simple integration
- Resists aggressive chemicals: Constructed of durable Ryton® Polyphenylene Sulfide (PPS)
- Automatic temperature compensation: Accurate measurements even with rapid temperature changes
- Two Year limited Warranty
S675
pH Sensor Kit, Hot Tap Insertion Assembly
Users installing into large tanks, large process lines and scrubber lines will appreciate this hot tap assembly sensor kit. Adjustable insertion depth up to 12” ensures sensor is in flow for best results. Designed in CPVC for a user friendly cost compared to expensive stainless models, the S675 hot tap insertion assembly is well suited for most water and wastewater treatment applications. Incorporates optional automatic temperature compensation (ATC) with 1000Ω RTD. Supplied with 10 foot cable. Kit also includes (1) S656CD Flat Surface pH Cartridge. The BV-1 Ball Valve (sold separately) facilitates removal from system without need for shutdown.
- Durable CPVC construction: Durable design suitable for most applications
- Simple maintenance: Remove sensors for cleaning and maintenance without system shutdown
- Easy installation: Mount in any orientation for ease of accessibility
- One year limited warranty
S656CD
pH Sensor Cartridge (Hot Tap, Insertion)
Users installing into large tanks, large process lines and scrubber lines will appreciate this flat surface self cleaning hot tap pH sensor for use with our S675 hot tap (aka wet tap or insertion) assembly. The sensor features flat surface, self-cleaning pH glass for extended maintenance cycles. Protective feet protect against breakage against ball valve or side walls. A unique feature of this sensor is mounting orientation. It can be mounted in any direction whereas most pH sensor should be mounted 5 degrees above the horizontal plane. With the quick disconnect BNC, sensors can be changed in seconds should replacement be required. Designed for use with our S675 Assembly and a BV-1 Ball Valve for a complete hot tap pH measurement solution.
- Reliable CPVC construction: Durable design with built-in measurement glass protection
- Extended sensor lifetime: Double junction reference protection ensures long sensor lifetime
- Easy installation: Mount in any orientation for ease of accessibility
- Simple maintenance: Remove sensors for cleaning and maintenance without system shutdown
- One year limited warranty
S651CD
pH Electrode, Flat-Surface, Submersible
This submersible pH electrode is ideal for tanks, flumes and sewer lines. Three versions available: general purpose, HF-resistant, or low-conductivity models. The self-cleaning, flat-surface design makes the S651CD resistant to coating, increasing time between maintenance cycles. Based on our popular S650CD, the S651CD features protective feet to guard the pH glass against breakage. Double junction reference protection extends the lifetime of the sensor. Should a replacement sensor be required, the electrode is equipped with quick disconnect BNC connections to minimize downtime due to electrode maintenance. Designed for use with our S653 Cable Assembly for a complete Submersible Flat-Surface, Self-Cleaning pH measurement solution.
- Flat surface design resists coating
- Double junction reference protection extends sensor lifetime
- Use with our S653 Cable Assembly for quick and easy maintenance
- Reliable CPVC construction
- One year limited warranty
pH6000
Process pH Sensor, Light Duty
The pH6000 is a light duty pH probe for continuous monitoring of surface water and ground water, including environmental and industrial source water monitoring. The durable Ultem®body permits use in the field, while conferring chemical compatibility. Double junction reference protection allows use in environments that contain reference fouling contaminants, including heavy metals. Fully integrated cable comes in a 10 foot (3 meter) standard length, with custom cables available by request.
- Durable and low maintenance: Ultem® body construction, reinforced meter connection, and sealed reference design
- Allows monitoring in variable chemical environments: 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
S660CD
pH Sensor, for 600 series assemblies
pH5000
pH Sensor, Polycarbonate Swimming Pool
Maintaining proper pH in a swimming pool is critical to chlorine sanitizing activity. Our pH5000 swimming pool pH sensor is reliable and easy to use – perfect for most swimming pool pH testing applications. The durable polycarbonate body stands up to the usual wear and tear, with built in protection for the measuring pH glass. No maintenance is required to keep the sensor working, with a convenient sealed gel reference design.
- 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 continuous swimming pool pH monitoring
- Instantly ready for use: Shipped in storage bottle for long shelf life – guaranteed for one year
- One year limited warranty
S420C/BTD
pH Sensor, Extended Life Strantrol Direct-Fit Replacement
Our S420 series of pH sensors deliver reliable online pH monitoring as a direct-fit replacement for Strantrol pH sensors W2T4677 or W2T4675. Extended sensor lifetime is achieved through a large electrolyte reservoir. Durable CPVC construction with built-in protection for the pH measuring surface. Booted BNC connector included with optional cable lengths. Compatible with all pH meters accepting a BNC connector.
- Reliable measurement performance: Durable CPVC construction for reliable online performance
- Direct-fit Compatibility: Replacement sensor for several popular Strantol models
- Perfect for pressurized applications: Sealed, no maintenance reference design
- Instantly ready for use: Shipped in storage bottle for long shelf life – guaranteed for one year
- One year limited warranty
S465C
pH Sensor, Extended Life Acu-Trol Direct-Fit Replacement
Our S465 series of pH sensors deliver reliable online pH monitoring as a direct-fit replacement for Acu-Trol pH sensor 744000260 (AKpH-FB). Extended sensor lifetime is achieved through a large electrolyte reservoir. Durable PPS construction with built-in protection for the pH measuring surface. Booted BNC connector included with optional cable lengths. Designed for use with Acu-Trol® controllers AK110, AK600, AK2100.
- Reliable measurement performance: Durable PPS construction for reliable online performance
- Direct-fit Compatibility: Replacement sensor for several popular Acu-Trol® models
- Perfect for pressurized applications: Sealed, no maintenance reference design
- Instantly ready for use: Shipped in storage bottle for long shelf life – guaranteed for one year
- One year limited warranty
* Acu-Trol is a registered trademark of Pentair. No affiliation, endorsement or sponsorship is stated or implied.
S222CD
pH Sensor, Light-Duty Online Process
Our S222 series of pH sensors are flexible for light-duty in-line or submersion online pH monitoring and control applications. Replace this light duty pH sensor in seconds with the quick disconnect BNC design. For use with the S653 series cable assembly, which comes equipped with 1/2″ NPT threads for easy submersion installation. For in-line use, install with a 3/4″ mounting gland (Sensorex FC75P; sold separately). For complete kit, purchase S222CD Light-Duty Online Process pH Sensor Kit.
- Reliable performance in light-duty applications: Recessed bulb design ensures reliable performance
- Lightning fast sensor changes: Modular design allows replacement cartridges to be changed in seconds without tools
- Perfect for pressurized applications: Sealed, no maintenance reference design
- Low total cost of ownership: All mounting hardware is reuseable. Only replace the quick-change sensor cartridge
- One year limited warranty
S222CD
pH Sensor Kit, Light-Duty Online Process
Our S222 series of pH sensors are flexible for light-duty in-line or submersion online pH monitoring and control applications. Replace sensors in seconds with the quick disconnect BNC design. This pH electrode kit includes S222CD pH electrode and S653 Cable Assembly. S653 cable assembly comes equipped with 1/2″ NPT threads for easy submersion installation. For in-line use, install with a 3/4″ mounting gland (Sensorex FC75P; sold separately).
- Reliable performance in light-duty applications: Recessed bulb design ensures reliable performance
- Lightning fast sensor changes: Modular design allows replacement cartridges to be changed in seconds without tools
- Perfect for pressurized applications: Sealed, no maintenance reference design
- Low total cost of ownership: All mounting hardware is reuseable. Only replace the quick-change sensor cartridge
- One year limited warranty
