Description
The GE WES5302-111 is a specialized water quality analyzer and controller designed for precise monitoring of key parameters in industrial and municipal water systems. As part of GE’s Water & Environmental Solutions (WES) portfolio, this compact yet robust unit targets applications requiring reliable measurement of turbidity, chlorine, or suspended solids with integrated control capabilities. The GE WES5302-111 combines sensor input processing, alarm management, and relay control in a single NEMA 4X/IP66 enclosure, featuring an intuitive interface for field operations and seamless integration with plant control systems. Engineered for continuous operation in demanding environments, it employs advanced optical compensation algorithms to maintain accuracy despite fouling or ambient light interference. The “-111” suffix designates specific I/O configurations including dual analog outputs and three programmable relays, enabling standalone control of chemical feed pumps, alarms, or valve actuators without external PLCs. The GE WES5302-111 delivers exceptional value by reducing complexity in targeted water quality applications while meeting EPA and ISO 7027 compliance requirements.

GE WES5302-111
Technical Specifications
| Parameter Name | Parameter Value |
| Product Model | WES5302-111 |
| Manufacturer | GE (General Electric) |
| Product Type | Water Quality Controller/Analyzer |
| Primary Measurements | Turbidity, Chlorine (Free/Total), Suspended Solids |
| Measurement Range | Turbidity: 0-1000 NTU; Chlorine: 0-20 ppm |
| Accuracy | ±2% of reading or 0.1 NTU (whichever greater) |
| Analog Outputs | 2 x 4-20mA (isolated, assignable) |
| Relay Outputs | 3 x SPDT (5A @ 240V AC) |
| Sensor Inputs | 1 x digital sensor interface (GE Smart Protocol) |
| Communication | Modbus RTU (RS-485), HART |
| Display | Backlit LCD with status LEDs |
| Enclosure Rating | NEMA 4X/IP66 (fiberglass-reinforced polyester) |
| Operating Temperature | -10°C to +55°C |
| Power Supply | 100-240V AC, 50/60 Hz |
| Certifications | CE, UL, ISO 7027 |
| Dimensions | 250 x 250 x 120 mm (HxWxD) |
Main Features and Advantages
Self-Optimizing Measurement: The GE WES5302-111 features adaptive optical compensation that automatically adjusts for lens fouling and ambient light interference, reducing maintenance frequency by up to 40% compared to conventional turbidimeters. Its integrated wiper system (optional) enables automated cleaning cycles configurable via time or drift thresholds.
Simplified Control Logic: With three programmable relays and two analog outputs, the unit executes local control strategies like chlorine dosing proportional to flow rate or high-turbidity diversion valve activation without external controllers. Pre-configured application templates accelerate deployment for common scenarios like filter breakthrough detection.
Diagnostic Intelligence: Continuous sensor health monitoring detects abnormal response times or signal degradation, triggering predictive maintenance alerts. On-board event logging stores 10,000 time-stamped records for compliance reporting and trend analysis.
Seamless Integration: HART overlay on analog outputs allows simultaneous digital communication with DCS systems while maintaining 4-20mA compatibility. The GE WES5302-111 supports GE’s Smart Sensors with plug-and-play recognition, storing calibration history directly in the sensor head.
Application Field
The GE WES5302-111 excels in targeted water quality applications:
Drinking Water Treatment: Monitors filter effluent turbidity and controls backwash cycles when exceeding 0.3 NTU thresholds, ensuring Safe Drinking Water Act compliance.
Wastewater Discharge: Measures suspended solids in final clarifiers and triggers diversion valves during permit excursions.
Swimming Pool/Spa Management: Maintains free chlorine residuals (1-3 ppm) via proportional control of chemical feed pumps.
Cooling Tower Blowdown: Optimizes cycles of concentration by correlating turbidity with TDS levels, reducing water waste.
Industrial Process Water: Guards against particulate contamination in manufacturing rinse water for electronics or pharmaceuticals.

GE WES5302-111
Related Products
GE TSL-18 Turbidity Sensor: Optical sensor with automatic air bubble rejection for WES5302-111 integration.
GE CL-17 Free Chlorine Analyzer: Standalone chlorine monitor compatible with WES5302-111 via Modbus.
GE WES5301-100: Base model without relay outputs for monitoring-only applications.
Emerson 1081 Turbidity Controller: Successor platform with enhanced diagnostics post-GE acquisition.
GE WES5302-112: Advanced variant featuring fourth relay and Ethernet/IP communication.
GE AQS-1 Auto Cleaning System: Integrated wiper and air blast assembly for WES5302-111.
GE WES-CAL Turbidity Standards: Formazin solutions for calibration validation.
Installation and Maintenance
Pre-installation preparation: Mount vertically in vibration-free location with sensor cable path avoiding sharp bends. Verify grounding continuity using<10>
Maintenance recommendations: Clean optical windows monthly with soft cloth and isopropyl alcohol. Validate calibration quarterly using NIST-traceable standards. Test relay operations bimonthly via simulated alarms. Replace O-rings annually on immersed sensors. Monitor diagnostic logs for signal stability trends indicating lens fouling.



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