2774-2777 Threaded DryLoc® pH-ORP Electrodes

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 PTFE double reference junction with KNO3 in the front chamber to block various poisoning ions. Embedded positioning of the temperature element in the pH 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.

Fields of Application:

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

Advantages:

• 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

Download tech sheet 2774-2777

2764-2767 Differential DryLoc® pH-ORP Electrodes

The Signet 2764-2767 Differential pH & ORP electrodes are built with the DryLoc® 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, ensuring 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 (S2-) and metals. To ensure long service life, the reference features a refillable electrolyte chamber and a replaceable equitransferant salt bridge. The patented porous PTFE 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 3 KΩ, 300Ω, or PT1000 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 to Signet's 8900 Multi-Parameter Controller. The electrodes can also be used with the Model 2760 preamplifier to connect to the Signet's 5700 or 8750 instruments.

Fields of Application:

• Plating Baths
• Textile Dye Process
• Harsh Chemical Applications
• Heavy metal Removal and Recovery
• Toxics Destruction
• Surface Finishing

Advantages:

• Field-proven differential design for stable measurements in the most aggressive applications
• Water-tight DryLoc connector with foulproof gold contacts
• PTFE 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

Download tech sheet 2764-2767

3719 pH-ORP Wet-Tap

The Signet 3719 pH/ORP Wet-Tap allows installation and removal of pH or ORP electrodes (2756 /2756) without the need for process shutdown during routine electrode maintenance and calibration. Process isolation is achieved with a double O-ring seal on a unique and compact retraction assembly; no separate valve is required. A camactivated automatic locking mechanism, SafeLoc™, and the short stroke design help to assure operator safety. The wet-tap unit can be mounted at any angle and can be used with the Signet DryLoc Wet-Tap electrode.

Fields of Application:

• Aquatic Animal Life Support Systems
• Recreational Water Monitoring
• Water & Wastewater Treatment
• Effluent Monitoring
• Neutralization Systems
• Sanitisation Systems
• Pool and Spa Control

Advantages:

• Removes electrodes from pressurized systems for routine service or replacement
• Automatic process isolation upon electrode retraction - no separate valve required
• Space saving 45 mm (1.75 in.) short-stroke design
• Sealed pneumatic dampening for smooth and safe operation
• SafeLoc™: Camactivated automatic locking mechanism (patent pending)
• Compatible with DryLoc Electrodes for use with 2750 pH/ORP Sensor or 2760 DryLoc pH/ORP Preamplifiers and Connectors
• Large reference volume for long electrode life
• Protects electrode sensing surface from breakage
• pH electrode includes integrated temperature sensor
• Low profile Clamp-on Saddle Fittings for convenient installation in ASTM pipe sizes 2.5 to 12 in.

Download tech sheet 3719

Use 2756 pH electrode or 2757 ORP

2714 and 2716 CPVC body General Purpose Electrodes

NOTE

Model 3-2714 and 3-2716 pH electrodes should not be used except as replacements. Until 2015.

Model 3-2715 and 3-2717 ORP electrodes should not be used except as replacements. Until 2015

- the required 2-2720 pre-amp has been discontinued as is NOT available from the factory - March2010

pH Probe - requires Pre-Amp - see below

Model 3-2714 - flat surface resists fouling - for use in most industrial applications 

Model 3-2714-HF - flat surface in applications with trace hydrofluoric acid 

Model 3-2716 - bulb type provides the best choice for most applications for pool/spa and surface waters 

Model 3-2716-DI - bulb type for use with pure water 

Features

• Twist and lock with Pre-Amp (Model 2720)
• Double junction combination electrode
• Reference: Ag/AgCl
• Platinum sensing surface
• Porous UHMW polyethylene ref. junctions
• May be used inline or submerged
• CPVC construction - Double Viton O-Rings seals

3-2715 Flat ORP electrode - resists fouling for most heavy industrial applications. 

3-2717 Bulb ORP electrode - for general service use.   

Signet Model 2720 Pre-Amp is now obsolete available in limited supply 

• 3-2720 with 3/4" FNPT connection - Price:   $ 300.00 May 2010

Use with the above probes to increase the signal strength that allows the probe to be mounted a great distance from the controller.   This device forms the top half of the twist and lock holder for the pH electrode. The CPVC housing has a 3/4" FNPT thread that allows the probe assembly to be submerged.  Includes 15 foot cable - may extend up to 400 feet.

This pre-amp is also used with Model 2715 and 2717 ORP electrodes.