Nexisense Pressure Sensor Tap Point Selection Guide: Standard Installation Ensures Accurate Measurement

The measurement accuracy of pressure sensors highly depends on the selection of tap points. Improper positioning may lead to bubbles, sediment, or condensation, causing data deviations or even equipment failure. Nexisense pressure sensors serve the industrial sector with stable performance, and correct point selection maximizes their advantages, ensuring long-term reliable operation. This article provides comprehensive guidance from basic principles to detailed standards.

Definition and Function of Pressure Sensors

A pressure sensor converts medium pressure into an electrical signal, primarily used for real-time monitoring of pipeline or equipment pressure, supporting process control and fault warning. It is indispensable in industrial automation, helping optimize operations and prevent accidents.

Nexisense products cover wide ranges and high precision, suitable for various media and environments.

Working Principle Analysis

The core is based on a pressure-sensitive element (such as diffused silicon) that generates a signal through deformation, processed by circuitry to output standard forms. The tap point directly affects how the medium contacts the diaphragm; improper positioning may allow impurities to interfere with the signal, causing drift or error.

Correct tap point selection ensures representative pressure is transmitted and minimizes additional effects.

Internal Structure Analysis

Nexisense pressure sensors include a stainless steel diaphragm, sensitive core, and processing module. The diaphragm isolates the medium, the core converts pressure, and the housing is corrosion-resistant.

Interface design facilitates connection to source components, and the compact structure adapts well to field installation.

Key Advantages

With standardized tap points, Nexisense sensors offer high accuracy, fast response, and strong impact resistance. Excellent stability reduces maintenance requirements. Even in complex media, low drift is maintained, ensuring reliable data and supporting remote monitoring.

These features are particularly valuable in harsh industrial environments, enhancing overall system efficiency.

Tap Point Selection Principles

Tap point selection is critical for successful measurement. Key points summarized according to industry standards are as follows:

Media Type Influences Position

• For gas pressure measurement, select the upper half of the pipeline to avoid liquid condensation accumulation.

• For liquid pressure, tap points are located in the lower half of the pipeline at a 0°–45° angle from the horizontal centerline to prevent bubble interference.

• For steam pressure, tap points are in the upper or lower half within a 0°–45° range, balancing condensation and representativeness.

Pipeline and Environment Considerations

• Place source components in stable flow segments, avoiding vortex zones.

• When installed on the same pipeline as temperature source components, pressure components should be upstream.

• Do not extend beyond the inner pipe wall to prevent flow disturbance.

• For turbid media (e.g., with particles), install vertically with an upward tilt (>30°); for horizontal pipelines, install at a sharp angle along the flow.

Sensor Installation Location Requirements

• Ensure adequate lighting and ease of operation and maintenance, avoiding vibration, humidity, high temperature, corrosion, or strong magnetic fields.

• Install as close as possible to the source component to reduce capillary tube errors.

• Gas medium sensors should be above the tap point; liquid/steam sensors below the tap point to facilitate venting/draining.

• Low-pressure sensors should be at the same height as the tap point, especially for liquids and condensable gases.

Application Scenarios

In chemical pipelines, gas is tapped from the upper half to prevent liquid accumulation; liquid from the lower half to avoid bubbles. Steam lines often use condensate bends to ensure dry steam measurement.

In water supply or heating systems, choose stable straight segments to support leak warning. In turbid petroleum and petrochemical media, tilt installation prevents sedimentation.

Nexisense products adapt to these scenarios, providing a reliable data foundation.

Measurement Methods and Precautions

Direct-contact measurement is common; adding shut-off valves facilitates maintenance and prevents blockage. Capillary tubes should be short and straight with slopes appropriate for the medium (gas upward, liquid downward).

Multi-point monitoring in complex systems improves representativeness.

Maintenance and Service Guidelines

Regularly inspect and clean tap points to prevent blockage. Verify that the position has not shifted and calibrate sensors.

Prevent condensation in humid environments and add damping in vibration-prone areas. Perform comprehensive verification annually to ensure long-term accuracy.

Technical Specifications Overview

Frequently Asked Questions

How much error occurs if the tap point is selected incorrectly?
It may cause ±5%-10% error or even equipment failure.

Why is the steam tap point flexible?
To balance condensation and representativeness.

Why tilt tap points for turbid media?
To prevent particle sedimentation and blockage.

Why are sensor positions at different heights?
To reduce additional gas/liquid devices and simplify the system.

Is it important to be close to the source component?
Yes, it reduces capillary tube delay and errors.

Conclusion

Tap point selection directly determines measurement quality. From medium type to environmental factors, every standard aims to minimize interference. Nexisense supports best practice with durable design and precise performance. Following these principles significantly enhances system reliability, prevents risks, and promotes safer and more efficient industrial processes. In modern measurement technology, attention to detail is the foundation for high-precision monitoring.