Sensor Tube Body: Temperature Range -40°C to 200°C

Component Specifications

Definition

The Sensor Tube Body is a critical structural component in sensor tube/bypass assemblies, designed to provide a stable, protected environment for sensing elements (such as pressure, temperature, or flow sensors). It ensures accurate measurement by maintaining proper alignment, minimizing external interference, and facilitating fluid flow through defined pathways. Typically integrated into bypass configurations, it allows for representative sampling of process media while protecting sensitive instrumentation from direct exposure to harsh conditions.

Working Principle

The Sensor Tube Body operates by creating a controlled flow path that directs a representative sample of the process fluid past embedded sensing elements. In bypass configurations, it diverts a small portion of the main flow through the tube, where sensors measure parameters like pressure, temperature, or flow rate. The body's geometry and material properties ensure minimal pressure drop, prevent turbulence, and maintain thermal stability, enabling precise and reliable measurements that reflect the main process conditions.

Materials

Stainless steel (AISI 316L/304), Hastelloy, Titanium, or engineered plastics (PTFE, PEEK) depending on corrosion resistance, temperature, and pressure requirements. Surface finish: Ra ≤ 0.8 μm for hygienic applications.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Length	100-1000 mm
Diameter	6-50 mm
Wall Thickness	1-5 mm
Connection Type	Threaded (NPT, BSP), Flanged, Clamp
Pressure Rating	Up to 100 bar
Temperature Range	-40°C to 200°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 1127, DIN 11850

Parent Products

This component is used in the following industrial products

Sensor Tube/Bypass

A precision component within a Mass Flow Controller that houses the thermal sensor and provides a calibrated flow path for accurate gas measurement.

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Engineering Analysis

Risks & Mitigation

Material corrosion leading to contamination
Improper installation causing measurement drift
Fatigue failure under cyclic pressure
Thermal expansion mismatch with sensors

FMEA Triads

Trigger: Corrosive process media
Failure: Wall thinning or pitting, leading to leaks or sensor damage
Mitigation: Use corrosion-resistant materials (e.g., Hastelloy), apply protective coatings, and implement regular inspection schedules.

Trigger: Vibration from machinery
Failure: Cracking or loosening of connections, resulting in inaccurate readings
Mitigation: Design with reinforced mounts, use vibration-damping materials, and ensure proper installation torque.

Trigger: Thermal cycling
Failure: Expansion/contraction causing sensor misalignment or seal failure
Mitigation: Select materials with matched thermal coefficients, incorporate expansion joints, and control process temperature gradients.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.1 mm on diameter, ±0.5 mm on length

Test Method

Hydrostatic pressure testing per ISO 1127, dimensional verification with CMM, material certification to ASTM standards

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

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Manufacturers of Sensor Tube Body

Manufacturer profiles associated with Sensor Tube Body.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the primary function of a Sensor Tube Body?

It provides a protected, stable environment for sensing elements, ensuring accurate measurement by controlling fluid flow and minimizing external interference in industrial systems.

How does a Sensor Tube Body differ from a standard pipe?

Unlike standard pipes, it is precision-engineered with specific geometries, materials, and surface finishes to optimize sensor performance, reduce turbulence, and maintain calibration integrity.

Can Sensor Tube Bodies be customized for different industries?

Yes, they are often customized in material, size, and connection types to meet industry-specific requirements such as hygiene in food processing or corrosion resistance in chemical manufacturing.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Sensor Tube Body