Nestec Services

Nestec flow switches and indicators are part of ABLE Instruments’ in-house product portfolio, following the acquisition of Nestec Services Ltd. This trusted range of mechanical flow detection devices is fully supported by ABLE’s sales, service, and technical infrastructure in the UK and Ireland.

With more than 40 years of engineering behind them, Nestec flow switches and indicators have earned a strong reputation for reliability, simplicity, and robustness across a wide range of flow monitoring applications. Originally developed to meet the needs of chemical dosing systems, they are now widely used in utilities, OEM equipment, process plants, offshore installations, and harsh industrial environments.

The Nestec range includes reed switch, magnetic piston, and proximity-based flow switches, as well as compact indicators suitable for visual and signal-based flow confirmation. Many models are available with IP67 or IP68 environmental protection, flameproof (ATEX) housings, or intrinsically safe output options for hazardous area use.

Have a particular application in mind? We’d welcome a call on +44 (0) 1189 169 420

UK Engineering, UK Support

As the home of Nestec, ABLE Instruments offers:

  • Full product traceability and documentation
  • Application engineering and selection support
  • Product customisation (thread types, materials, enclosures)
  • Ongoing availability of spares and direct replacements
  • Field installation and commissioning advice

Our experienced team ensures seamless specification and integration of Nestec flow products into both legacy and new systems.

Product Highlights

  • Series 3000 / 3000E: Compact reed switch flow switches for low-flow dosing lines, IP67 rated
  • Series 4000: Reed switch-based indicators for general-purpose flow detection
  • Series 5000: Magnetic piston switches with optional flameproof housings for ATEX applications
  • Series 8000: Submersible IP68 proximity flow switches for wet environments
  • Series 21000 / 22000: High-sensitivity pulse and proximity switches for control integration

Designed for easy installation and minimal maintenance, these devices provide highly repeatable switching under pulsating, turbulent, or intermittent flow conditions. They are commonly used in:

  • Chemical dosing systems
  • HVAC and chilled water loops
  • Heat exchangers and pump protection
  • Water treatment systems
  • Oil, fuel, and hydraulic flow monitoring
  • Offshore skids and harsh environments

Whether you’re replacing an existing Nestec switch, specifying new equipment, or upgrading to flameproof protection, ABLE Instruments ensures continuity, support and direct access to the complete Nestec range.

Showing all 6 results

Nestec 4000 Series Flow Switch

Reed switch flow switch for cooling, dosing and OEM applications.

  • Brand: Nestec Services

  • P/N: 4000 Series

  • Lead Time: Contact us for info

Nestec 8000 Series Flow Switch

Pressure-tight flow switch for hydraulic and heavy-duty applications.

  • Brand: Nestec Services

  • P/N: 8000 Series

  • Lead Time: Contact us for info

Nestec 21000 Series Flow Switch

High-flow piston switch for 2″ pipelines and large volumes.

  • Brand: Nestec Services

  • P/N: 21000 Series

  • Lead Time: Contact us for info

Nestec 22000 Series Flow Switch

Inline piston flow switch with SPDT output and 1″ connections.

  • Brand: Nestec Services

  • P/N: 22000 Series

  • Lead Time: Contact us for info