2724-2726 pH/ORP Electrodes

Data Sheet
User's Manual

The Signet 2724-2726 pH and ORP Electrodes features a patented reference electrode design and uses the unique foul-proof patented DryLoc® connector. The large area PE reference junction and pathway is constructed to increase the total reference effectiveness and ensures long service life.

The DryLoc connector with foul-proof gold plated contacts readily connects the sensor to the mating 2760 preamplifier or the 2750 sensor electronics. The robust Ryton® threaded sensor body and choice of flat pH, bulb pH, or flat ORP sensing elements provides broad range of chemical compatibility for a wide variety of applications.

There are two optional sensing versions, HF and LC, available. The quick temperature response is available in either a PT-1000 or 3KΩ temperature sensor and allows compatibility with all Signet pH/ORP instruments. The 2724-2726 electrodes are general-purpose sensors ideal for a wide range of applications. The sensors incorporate ¾” NPT or ISO 7/1 R¾ threads for installing into standard pipe-tees. They can also be mounted directly into Signet standard fittings.

Features:

• Designed for use with 2750 Sensor
• Foul-proof connector
• Gold-plated contacts
• Durable CPVC body
• Self-cleaning flat versions reduce risk of glass breakage
• Large reference volume and solid polymer electrolyte
• Temperature sensor included in pH electrodes
• DI option for pure water
• HF option for pH

Applications:

• Water & Wastewater Treatment
• Neutralization Systems
• Scrubber Control
• Effluent Monitoring
• Surface Finishing
• Heavy Metal Removal and Recovery
• Toxics Destruction
• Sanitization Systems
• Commercial Pools & Spas
• Aquatic Animal Life Support Systems
• Process Control

2750/2760 DryLoc pH/ORP Sensor Electronics and Preamplifiers

2750 Data Sheet
2750 Manual

2760 Data Sheet
2760 Manual

The Signet 2750 and 2760 pH/ORP Sensor Electronics and Preamplifiers, featuring DryLoc® connectors, provide a variety of functions to suit various requirements.

The 2760 is a preamplifier that allows any DryLoc® pH/ORP electrode to work with most Signet instruments. It is also sold as a simple connector for use with other manufacturers' instruments that do not require a preamplified signal.

The 2750 comes with the same pre-amplified signal as the 2760, but features two different outputs: a two-wire 4 to 20mA loop output, or a digital (S3L) output which allows for longer cable lengths and is compatible with the Signet 8900 Multi-Parameter Controller. The 2750 devices self-configure for pH or ORP operation via automatic recognition of the electrode type. The optional EasyCal feature allows simple push-button calibration and includes an LED indicator for visual feedback.

The DryLoc® electrode connector found on both models quickly forms a robust assembly for submersible and in-line installations. NEMA 4X junction enclosures are integral parts of the 2750 in-line version and are also available as accessories for both Models 2750 (submersible version) and 2760.

Features:

• In-line integral mount and submersible installation versions
• Automatic temperature compensation
• Auto configuration for pH or ORP operation
• Optional EasyCal calibration aid
• Automatic buffer recognition
• Junction boxes for convenient wiring
• Compatible with 3719 pH/ORP Wet-Tap

• Water/Wastewater Treatment
• Neutralization Systems
• Scrubber Control
• Effluent Monitoring
• Surface Finishing
• Flocculent Coagulation
• Heavy Metal Removal and Recovery
• Toxics Destruction
• Sanitization Systems
• Pool & Spa Control
• Aquatic Animal Life Support Systems

2754-2757 pH/ORP Electrodes

Data Sheet
User's Manual

The Signet 2754-2757 pH and ORP Electrodes feature a unique foul-proof DryLoc® connector with gold-plated contacts designed specifically for use with the Signet 2750 and 2760 Sensor Electronics and preamplifiers. These dependable and highly responsive electrodes feature a large reference chamber volume and intelligent positioning of internal elements that combine to extend the service life. The electrodes are offered with either flat or bulb sensing elements. The flat versions allow sediment and particles to sweep past the measurement surface, minimizing the risks of abrasion, breakage and coating. The bulb versions can be used for general purpose applications and are also offered with a glass or plastic body for use with the 3719 Wet-Tap assembly.

The choice of a PT-1000 or 3KO temperature sensor allows compatibility with all Signet pH/ORP instruments.

The 2754-2757 electrodes are the flagship sensors of the Signet pH/ORP product line. They are all-purpose sensors ideal for a wide range of universal applications.

Features:

• Designed for use with 2750 Sensor
• Foul-proof connector
• Gold-plated contacts
• Durable CPVC body
• Self-cleaning flat versions reduce risk of glass breakage
• Large reference volume and solid polymer electrolyte
• Temperature sensor included in pH electrodes
• DI option for pure water
• HF option for pH

Applications:

• Water & Wastewater Treatment
• Neutralization Systems
• Scrubber Control
• Effluent Monitoring
• Surface Finishing
• Heavy Metal Removal and Recovery
• Toxics Destruction
• Sanitization Systems
• Commercial Pools & Spas
• Aquatic Animal Life Support Systems
• Process Control

2764-2767 Differential DryLoc pH/ORP Electrodes

Data Sheet
User's Manual

The Signet 2764-2767 Differential pH & ORP electrodes are built with the DryLocT connector a Ryton® body and TeflonT reference junction to handle even the most extreme and harshest of chemical applications.

These differential electrodes use field-proven 3-electrode differential technique: the pH and reference electrodes are measured against a ground electrode, insuring a steady and stable signal. A key feature is the reference electrode, which is protected in a glass half-cell embedded in the reference chamber and is protected from compounds that may contain sulfides (H2S) and metals. To ensure long service life, the reference features a refillable electrolyte chamber and a replaceable equitransferant salt bridge. The patented porous TeflonT reference junction resists fouling, clogging and chemical attack.

Other elements of the design are the solution ground, the pH/ORP electrodes, and the temperature element. The solution ground eliminates noisy measurements by draining electrical current away from the reference electrode. The pH/ORP electrodes are designed with a flat or bulb measurement surface, and a temperature device that is positioned at the tip of the measurement surface, making the temperature response of T95% less than 1 minute. Various temperature devices offered include 3KO, 300O, or PT-1000 RTD. The electrodes are used with the Signet 2750 Sensor Electronics, which provide a blind 4 to 20 mA output or use the digital (S3L) output to connect Signet's 8900 Multi-Parameter Controller. The electrodes can also be used with the Model 2760 preamplifier to connect to Signet's 5700 or 8750 instruments.

Features:

• Field-proven differential design for stable measurements in the most aggressive applications
• Water-tight DryLoc connector with foulproof gold contacts
• Porous Teflon™ reference junction
• Rebuildable reference electrode
• Solution ground
• Integral temperature sensor. Quick temperature response
• Easy sensor replacement using DryLoc™ electrode connector
• Compatible with other suppliers' instruments

Applications:

• Water and Wastewater Treatment
• Coagulation and Flocculation
• Plant Effluent
• Plating Baths
• Scrubbers
• Textile Dye Process
• Harsh Chemical Applications
• Heavy metal Removal and Recovery
• Toxics Destruction
• Surface Finishing

2774-2777 Threaded DryLoc pH/ORP Electrodes

Data Sheet
User's Manual

The Signet 2774 - 2777 pH and ORP Electrodes feature a unique foulproof DryLoc™ connector with goldplated contacts designed specifically for use with the Signet 2750 and 2760 preamplifiers, sensor electronics, and connectors. These dependable and highly responsive electrodes feature a TeflonT double reference junction and a large reference chamber that combine to extend the service-life. Embedded positioning of the temperature element in the pH/ORP sensing tip allows the temperature response to be quick and accurate. The electrodes are offered with either flat or bulb style sensing elements. The flat versions allow sediment and particles to sweep past the measurement surface, minimizing risks of abrasion, breakage and coating. The bulb versions can be used for general purpose applications. Due to the specially designed chambers which keep electrolyte in place, all versions can be mounted at any angle, even inverted.

Features:

• Durable DryLoc™ connector with gold plated contacts
• Special design allows mounting at any angle
• Quick temperature response
• High temperature versions available
• Easy sensor replacement using DryLoc™ electrode connector
• Mounts into standard 3/4 inch threads

Applications:

• Water Treatment & Water Quality Monitoring
• Demineralizer, Regeneration & Rinse
• Cooling Tower and Boiler Protection
• Aquatic Animal Life Support Systems
• Pool and Spa Control
• Neutralization Systems

2720/2721 Preamplifier

Data Sheet
User's Manual

Pre-amplification is required to protect the output signal of pH & ORP electrodes from a wide variety of electromagnetic interference common in industrial environments. The Signet 2720 Pre-amplifier is installed locally, at the sensing point, to maximize this protection while allowing cable extensions up to 120 m (400 ft.). Signet's unique twist-lock design simplifies installation and maintenance by providing for the quick connection and disconnection of electrodes. And the CPVC body is virtually unbreakable for extended service-life in both submersible and in-line applications. If remote pre-amplification is necessary (e.g., tank temperature > 80° C), or if connecting to another manufacturer's electrode, use the Signet 2721 Remote Pre-amplifier.

Features:

• Twist-lock design allows quick connect/disconnect of sensors
• Local pre-amplification for submersible and in-line installations
• Unbreakable CPVC body
• Designed for use with Signet pH & ORP Twist-lock Electrodes to assure signal integrity up to 120 m. (400 ft.)

Applications:

• Water & Wastewater Treatment
• Neutralization Systems
• Scrubber Control
• Effluent Monitoring
• Surface Finishing
• Flocculent Coagulation
• Heavy Metal Removal and Recovery
• Toxics Destruction
• Sanitization Systems
• Commercial Pools & Spas
• Aquatic Animal Life Support Systems
• Process Control

3719 pH/ORP Wet-Tap

Data Sheet
User's Manual

The Signet 3719 pH/ORP Wet-Tap allows installation and removal of pH or ORP electrodes without the need for process shutdown during routine electrode maintenance and calibration. Process isolation is achieved with a doe is required. A camactivated automatic locking mechanism, SafeLoc™, and the short stroke design help to assure operator safety.

Features:

• Removes electrodes from pressurized systems for routine service or replacement
• Automatic process isolation upon electrode retraction - no separate valve required
• Space saving 45mm (1.75 in.) short-stroke design
• Sealed pneumatic dampening for smooth and safe operation
• SafeLocT: Camactivated automatic locking mechanism (patent pending)
• Compatible with Twist-Lock and DryLocT Electrodes for use with 2720 Preamplifier or 2750 pH/ORP Sensor
• Large reference volume for long electrode life
• Protects electrode sensing surface from breakage
• pH electrode includes integrated temperature sensor
• Suitable for mounting in any orientation
• Low profile Clamp-on Saddle Fittings for convenient installation in ASTM pipe sizes 2.5 to 12 in.

Applications:

• Aquatic Animal Life Support Systems
• Recreational Water Monitoring
• Scrubber Control
• Water & Wastewater Treatment
• Effluent Monitoring
• Neutralization Systems
• Surface Finishing
• Heavy Metal Removal
• Sanitization Systems
• Toxics Destruction

2759 pH/ORP System Tester

Data Sheet
User's Manual

The Signet 2759 pH/ORP Simulator is a battery-powered millivolt generator that simulates pH values of 4, 7 and 10, plus ORP values of ±700 mV. This device is useful as a troubleshooting aid and for general verification of system operation. However, it is not a substitute for periodic system calibration with pH buffers or test solutions. Accessory adapter cables (sold separately) enable the 2759 to connect directly to Signet 2720 and 2760 preamplifiers, or 2750 pH/ORP Sensor Electronics. The adapters include a selector switch for pH or ORP simulation. The switch triggers automatic sensorrecognition software in Signet pH/ORP instrumentation.

Features:

• Battery powered millivolt generator
• Simulates pH and ORP values
• High impedance input simulates preamplified signal
• Verifies system functionality
• Compatible with 2720, 2750 and 2760 preamplifiers
• Connects to any Signet pH/ORP instrument
• Verifies preamplifier or instrument electronics