Flow switch NJ NJV

Mechanical Flow Indicator / Switch for Water and Viscosity-Stable Oils

The NJ / NJV from Senseca is a robust mechanical flow indicator and switch designed for continuous monitoring of water (NJ) and viscosity-stable oils (NJV) in industrial applications. Operating on the spring-supported piston measuring principle, it features a magnetically coupled display with an optional reed switch for simultaneous visual flow indication and switching. The hermetically sealed display remains isolated from the process medium, ensuring reliable, maintenance-free performance even with dark or contaminated fluids.

Key Features:

  • 🌊 Spring-Supported Piston Technology

    Provides accurate and repeatable flow indication with low pressure loss and reliable switching performance.

  • 📊 Integrated Flow Indicator

    Magnetically coupled analog display delivers continuous visual monitoring while remaining isolated from the process medium.

Key Features:

  • ⚡ Optional Reed Switch

    Available with an optional reed switch for dependable flow monitoring and switching in industrial control systems.

  • 🛢️ Water & Oil Versions

    NJ is designed for water applications, while NJV is optimized for viscosity-stable oils from 30 to 200 mm²/s.

  • 🛡️ Rugged Industrial Construction

    Nickel-plated brass housing with a hermetically sealed display ensures long service life and reliable operation, even with dark or contaminated media.

Applications:

  • 💧 Water Distribution Systems

    Ideal for monitoring water flow in industrial pipelines and utility systems.

  • 🛢️ Hydraulic & Lubrication Systems

    Suitable for monitoring viscosity-stable oil flow in hydraulic and lubrication circuits.

  • 🏭 Industrial Process Automation

    Provides simultaneous visual flow indication and switching for manufacturing processes.

  • ⚙️ Pump & Equipment Protection

    Helps verify flow conditions and protects pumps, heat exchangers, and critical process equipment.

Why Choose This Solution?

The NJ / NJV combines reliable flow indication and switching in a compact, maintenance-free design for industrial liquid monitoring.

Dual Functionality

Flow indication and switching in one device.

Maintenance-Free

Mechanical operation without external power.

Rugged Design

Hermetically sealed display with durable brass construction.

Industrial Applications

Ideal for water systems, hydraulic circuits, lubrication systems, and industrial automation.

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Product Details