GF 3-9900-01 Signet Process Transmitter with Hot-Swap Modules

I. Product Overview (Overview)

The GF 3-9900-01 is the flagship multi-function process transmitter from Signet, a brand under Georg Fischer (GF). It features an innovative hot-swappable modular design, capable of receiving, processing, and outputting signals from various GF Signet sensors (including flow, pH/ORP, conductivity/resistivity, temperature, pressure, etc.). Its core value lies in simplifying system integration, reducing inventory, and lowering total cost of ownership, making it an ideal central unit for multi-parameter monitoring and control in fields such as water treatment, chemical processing, food & beverage, pharmaceuticals, and industrial process control.

II. Core Advantages & Features (Key Features & Benefits)

Revolutionary Modular Design:

Hot-swap Functionality: Allows online replacement or upgrade of input/output modules without powering down or interrupting the process, significantly enhancing system availability and maintenance convenience.

Versatile All-in-One Device: A single 3-9900-01 main unit, paired with different 3-9901-xx (input) and 3-9902-xx (output) modules, can adapt to almost any measurement requirement. Eliminates the need for dedicated transmitters for each sensor type.

Reduced Spare Parts Inventory: Only requires stocking a small number of universal main units and modules instead of a large quantity of different single-function transmitter models.

Powerful Functionality & Compatibility:

Universal Input: Compatible with all mainstream GF Signet sensors (e.g., Signet 2551, P51530-P2, 8900/8950 series, etc.), supporting parameters like flow, pH, conductivity, temperature.

Flexible Output: Provides dual-channel isolated 4-20mA analog output, relay alarm output, and Modbus RTU digital communication (RS-485), enabling easy integration into PLC, SCADA, or DCS systems.

Dual-line Backlit Display: Large LCD screen simultaneously displays measured values, units, status, and custom labels, ensuring clear and intuitive on-site reading.

Data Logging & Diagnostics: Built-in data logging function stores process trends. Features comprehensive sensor and system self-diagnostics.

Robust, Reliable & User-Friendly:

Robust Housing: Polycarbonate housing with a high protection rating of IP66 / NEMA 4X, suitable for harsh industrial environments.

Multiple Power Supply Options: Supports wide-range 85-265 VAC or 18-36 VDC power input, accommodating different global power standards.

Intuitive Menu Navigation: Easy configuration, calibration, and data viewing via front-panel keys and a clear menu structure.

Module Auto-Recognition: Automatically identifies inserted modules and loads the corresponding configuration, simplifying the setup process.

III. System Components (System Components)

A complete GF 3-9900-01 system typically includes:

3-9900-01: Transmitter main unit (includes display and core processor).

3-9901-xx: Input module (e.g., 3-9901-F1 for Signet flow sensors, 3-9901-P1 for pH sensors, etc.).

3-9902-xx: Output module (e.g., 3-9902-A2 for dual 4-20mA output, 3-9902-R2 for dual relay output, etc.).

Installation Kit & Sensors: Corresponding sensors (e.g., flow meters, pH electrodes, etc.) and mounting hardware.

IV. Technical Specifications Summary (Technical Specifications)

Input Type: Depends on the selected input module (flow pulse, pH/ORP mV, conductivity, RTD, etc.).

Output Type: Depends on the selected output module (dual isolated 4-20mA, dual relay, Modbus RTU RS-485).

Display: Dual-line, 16 characters per line, backlit LCD.

Power Supply: 85-265 VAC, 50/60 Hz or 18-36 VDC.

Protection Rating: IP66 / NEMA 4X.

Ambient Temperature: -20°C to 60°C (-4°F to 140°F).

Communication Protocol: Modbus RTU (standard, implemented via output module).

V. Typical Application Scenarios (Typical Applications)

Reverse Osmosis (RO) / Deionized Water (DI) Systems: Simultaneous monitoring of product water flow, pH, conductivity, and pressure.

Cooling Water Systems: Monitoring circulating flow, pH, and conductivity for blowdown and chemical feed control.

Chemical Processes: Centralized monitoring and control of pH, flow, and temperature across multiple reactors.

Wastewater Treatment: Monitoring pH, ORP (Oxidation-Reduction Potential), and flow at various stages of the treatment process.

Food & Beverage Production Lines: Monitoring flow, conductivity, and temperature during CIP (Clean-in-Place) procedures.

VI. Why Choose the GF 3-9900-01?

Choosing the GF 3-9900-01 means you are selecting:

Unparalleled System Flexibility: One device addresses multiple measurement needs, easily adapting to process changes.

Maximum Uptime: Hot-swap design enables maintenance and upgrades without process shutdown.

Simplified Procurement & Inventory Management: Reduces spare parts complexity and cost.

Reliable Quality & Global Support from GF Signet.