+GF+ Signet 3-2724-00 pH Electrode Industrial Standard Flat-Surface pH Measurement

The +GF+ Signet 3-2724-00 is a high-performance flat-surface pH electrode designed to excel in the most demanding applications, from wastewater treatment to chemical processing. As part of the renowned 2724-2726 series from Georg Fischer (GF), this electrode combines patented design innovations with robust materials to deliver reliable, long-lasting performance .

What is the +GF+ Signet 3-2724-00?

The 3-2724-00 is a flat-surface pH sensor featuring a built-in Pt-1000 automatic temperature compensation (ATC) element and a rugged 3/4" NPT (M) thread for straightforward installation . It utilizes a patented DryLoc® connector system with gold-plated contacts, ensuring a secure, corrosion-resistant, and foul-proof connection to Signet 2750 sensor electronics or 2760 preamplifiers .

Unlike traditional bulb-style electrodes, the flat-surface design of the 3-2724-00 offers a distinct advantage: self-cleaning capability. In fluids containing abrasive or fibrous materials, the flat surface is less prone to coating and fouling, significantly reducing maintenance requirements and extending sensor life in tough environments .

Key Features & Benefits

The +GF+ Signet 3-2724-00 is engineered for reliability and precision. Verified by multiple industrial suppliers and the manufacturer, its core features include:

Flat-Surface Sensing Element: Ideal for applications with high suspended solids or abrasive wear, providing a self-cleaning effect and resistance to coating .

Patented DryLoc® Connector: Features gold-plated contacts for a corrosion-proof, waterproof, and secure connection, ensuring signal integrity and ease of installation .

Chemically Resistant Ryton® Body: Constructed from rugged Ryton® (PPS) plastic, offering broad chemical compatibility for use in aggressive industrial solutions .

Integrated Pt-1000 Temperature Sensor: Provides accurate, automatic temperature compensation across the entire operating range for precise pH readings .

Wide Operating Range: Capable of measuring from 0 to 14 pH at temperatures from -10°C to 85°C (14°F to 185°F) and pressures up to 6.89 bar (100 psi) .

Easy Installation: The standard 3/4" NPT threads allow for direct mounting into Signet standard fittings, tees, or custom weldments, and the sensor can be installed at any angle, even inverted .

Extended Reference Life: Features a large-volume PE reference junction and patented reference design that maximizes electrolyte volume and resists fouling, leading to a longer operational lifespan .

Technical Specifications

Specification Details

Part Number 3-2724-00 

Type Flat-Surface pH Electrode 

Measurement Range pH 0 to 14 

Temperature Sensor Pt-1000 RTD (Automatic Temperature Compensation) 

Wetted Materials Ryton® (PPS), Glass, UHMW PE, FPM 

Process Connection 3/4" NPT (Male) 

Electrical Connection DryLoc® (Gold-plated contacts) 

Max. Temperature/Pressure -10°C to 85°C @ 6.89 bar (14°F to 185°F @ 100 psi) 

Efficiency >97% @ 25°C (77°F) 

Compatibility Signet 2750 Electronics, 2760 Preamplifier 

Certifications RoHS compliant, Manufactured under ISO 9001 

Why Choose a Flat-Surface Electrode?

Selecting the correct pH sensor geometry is critical for system performance. The flat glass of the 3-2724-00 offers significant advantages over traditional bulb electrodes in specific applications :

Superior Abrasion Resistance: In streams containing sand, grit, or other particulates, a bulb can be quickly eroded or shattered. The flat surface withstands this wear.

Self-Cleaning Action: The smooth profile minimizes areas where fibers or solids can accumulate, reducing the need for frequent manual cleaning.

Impact Resistance: The flat shape is inherently more robust against physical shock and vibration in the pipeline.

The 3-2724-00 is the preferred choice when you need a sensor that combines the accuracy of laboratory-grade measurement with the physical toughness required for industrial inline applications .