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Conductivity probe – 1/2″ NPT, 5 m cable

This conductivity probe is designed for precise monitoring of liquid conductivity under demanding process conditions. It is supplied with a 1/2" NPT process connection and a 5 m factory-fitted measurement cable, making it ready for plug-and-play integration with your existing PLC or control system.

The robust construction withstands both high temperatures and significant pressures, and the proven materials make the probe suitable for everything from raw-water and wastewater applications to chemical process lines.

Part no. FRE7100

Quick delivery
Multiple variants in stock
Suitable for demanding work environments
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Features and Benefits:

  • Wide measurement range — choose from multiple cell constants (10, 1, 0.1, 0.05, 0.02, or 0.01 cm⁻¹) for optimal accuracy at both low and high conductivities.
  • Pressure and temperature resistant — up to 6.9 bar at 100 °C (Polypro) and up to 34.5 bar at 100 °C with stainless-steel fitting, enabling safe measurement in hot and high-pressure processes.
  • Built-in temperature sensor (NTC 10 kΩ @ 25 °C) provides automatic temperature compensation for stable readings across a wide range.

Specifications:

  • Process connection: 1/2" NPT (Polypro; option 316 SS or Kynar)
  • Cable: 5 m, 24 AWG, stripped and tinned
  • Max. pressure / temp.: 34.5 bar @ 100 °C (Polypro) · 10.3 bar @ 120 °C (Kynar) · 34.5 bar @ 100 °C (316 SS)
  • Cell constants: 10, 1, 0.1, 0.05, 0.02, 0.01 cm⁻¹ (model CS10)
  • Temperature comp. element: 10 kΩ NTC @ 25 °C (options Pt100, Pt1000, Ni100, etc.)
  • Wetted materials: Insulator — Teflon · Electrodes — 316 SS (Monel, Titanium, Hastelloy optional) · O-ring — EPR
  • Electrical connection: 5-wire (white: outer electrode, black: inner, clear: shield, red/green: temp.)

With a single probe you get the flexibility to handle both ultra-clean and heavily loaded liquids without compromising accuracy. The compact 1/2" NPT connection fits directly into standard process piping, and the 5 m pre-terminated cable makes installation quick — no soldering or special connectors. Chemically resistant materials (Teflon insulator, 316 SS electrodes, and EPR O-ring) deliver long service life and minimize maintenance, even in aggressive media. Meanwhile, built-in temperature compensation prevents errors when process temperature fluctuates, reducing the need for frequent recalibration over time.

The probe helps you optimize process control by providing reliable, temperature-compensated conductivity data — whether dosing cleaning chemicals, monitoring salinity in rinse water, or controlling ion-exchange systems. Its high pressure and temperature tolerance means fewer probe replacements and less downtime in demanding operating environments, while the chemical-resistant design extends lifetime and lowers total cost of ownership.

In short: a robust, precise, and installation-friendly solution that keeps your processes firmly under control.

A reliable gas detection system starts with a thorough assessment of your workplace environment. With years of experience identifying risk areas and designing tailored solutions, we can help determine whether this product is the right fit for your needs.

Whether you need this product as a standalone solution or as part of a larger system, we’ll make sure it’s aligned with your workplace’s specific requirements. We work closely with you to ensure the solution meets both safety standards and the unique challenges of your operations.

Learn more about how we can help you find the right solution here.

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