Cable Protection for Rheonics Teletube Sensors : Rheonics Support

What products are involved?

SRV and SRD sensors with Tri-Clamp connections

What is the purpose of this article?

The goal of this article is to explain how to protect the M12 connector and cable on Rheonics Teletube sensors, ensuring that the complete assembly achieves the required ingress protection and mechanical robustness in the field. It will guide users on how to properly use cable protection with Rheonics Teletube sensor probes.

The goal is to protect the M12 connector and cable on Rheonics teletube sensors so that the complete assembly achieves the required ingress protection and mechanical robustness in the field. Learn how to assemble the SR-Teletube here.

Figure 1. Rheonics Teletube Type-SR sensor

TABLE OF CONTENTS

1. Basic Teletube Cable Protection
- 1.1. Integrated Strain Relief & Sealing
2. Full Teletube Cable and Connector Protection

1. Basic Teletube Cable Protection

For the SRx-TT-CAB, shown in Figure2, basic cable protection for a Teletube sensor is achieved in the probe by securing and sealing the cable at the point where it emerges from the cable gland(CG-TT). This provides essential safeguards.

Figure 2. Basic Teletube Cable Protection SRx-TT-CAB (Cable Gland End)

1.1. Integrated Strain Relief & Sealing

When a suitable IP-rated cable gland (e.g., IP67 polyamide or nickel-plated brass) is installed, it provides:

Strain Relief: Prevents tension on the sensor cable from damaging the internal connections at the sensor electronics housed within the Teletube.
Environmental Seal: Seals the entry point, protecting the sensor's internal wiring and electronics from dust, moisture, and splashes common in many industrial environments.
Internal Cable Protection (Inherited): By design, the Teletube's extension tubes inherently act as a protective conduit for the cable segment running inside the long probe, shielding it from the process environment and mechanical damage within the total probe’slength.

Figure 3. SRD-…-E1-FT-…-X8

2. Full Teletube Cable and Connector Protection

Full cable and connector protection for a Teletube sensor extends beyond basic sealing at the gland shown above, It requires a comprehensive mechanical, environmental, and chemical safeguarding for the entire cable run in harsh or demanding conditions. This ensures the highest level of reliability and longevity for the sensor system.

To achieve full protection, the Teletube's cable gland end is integrated into a more extensive protection system:

Enhanced Cable Gland Systems: Utilize high-grade, often metal (e.g., stainless steel), IP68 or higher rated cable glands. These provide superior resistance to corrosion, impact, and prolonged immersion, ensuring a robust seal at the Teletube's exit point.

Figure 4. Cable glands CG-TT for teletube sensor

Dedicated Cable Gland Adapters: For specific mounting requirements or to seamlessly integrate with external conduits, specialized cable gland adapters can be used with the Teletube's cable gland end.
External Conduit Systems (Flexible or Rigid):
- Flexible Conduits: The cable exiting the Teletube's gland can be routed through flexible metallic or non-metallic conduits (e.g., liquid-tight, corrugated polyamide, or braided steel). These conduits connect directly to the robust cable gland through an AT-TT threaded connection, offering continuous protection against abrasion, cuts, crushing, and even rodent damage along the entire path of the cable to the control system.

Figure 5. SRx-X1-34N-TT probe with AT-TT and Flexible conduit.