The MP Electronics Intrinsically Safe Duplexer Controller (ISD-D) is engineered for safe, reliable duplex pump control in hazardous environments. Designed for wastewater lift stations, wet wells, and industrial applications, this controller ensures intrinsically safe operation while delivering advanced control and monitoring capabilities.

The ISD-D manages two pumps in an alternating (lead/lag) configuration, promoting even wear and improving system longevity. With intrinsically safe inputs for conductance probes or float switches, it is ideal for classified areas where safety compliance is critical.

Built with solid-state reliability, integrated alarm functionality, and SCADA-ready communication options, the ISD-D provides seamless integration into modern control systems while maintaining the highest safety standards.

Key Features 

• Intrinsically safe design for hazardous/classified locations
• Controls and alternates two pumps (duplex system)
• Compatible with conductance probes and float switches
• High-level alarm output with visual indication
• Lead/Lag alternation for balanced pump usage
• Fail-safe circuitry for dependable operation
• SCADA-ready (Modbus or integration-ready depending on configuration)
• LED indicators for system status and diagnostics
• Compact, panel-friendly design

Specifications 

• Model: ISD-D
• Type: Intrinsically Safe Duplexer Controller
• Voltage: (Typically 120V AC – confirm per configuration)
• Inputs: Intrinsically safe probe or float inputs
• Outputs: Dual pump control relays + alarm relay
• Application: Hazardous locations / classified environments
• Mounting: Panel mount
• Construction: Solid-state electronics

Applications 

• Hazardous wastewater lift stations
• Wet wells in classified areas
• Chemical processing facilities
• Oil & gas environments
• Industrial fluid handling systems
• Confined space pump control