Name: PRD-B040EAIZ-62 Servo Drives SUPPLY BY Kollmorgen
Price: 5543 CNY
Availability: InStock

Description

Working Principle of RD-B040EAIZ-62

RD-B040EAIZ-62 is a high-precision pressure sensor developed by Parker, specifically designed for industrial hydraulic/pneumatic systems. Its operating principle is based on piezoresistive sensing technology combined with advanced signal conditioning, enabling accurate pressure-to-electrical signal conversion. Below is a detailed breakdown of its working mechanism:

1. Core Sensing Mechanism

The sensor’s sensing element is a micro-machined silicon piezoresistive diaphragm, integrated into a rugged stainless steel housing. When pressure (ranging from 0 to 40 bar, the rated measuring range of the RD-B040EAIZ-62) acts on the diaphragm:

The diaphragm deforms elastically in proportion to the applied pressure.
Embedded piezoresistors on the diaphragm undergo resistance changes due to the piezoresistive effect (a phenomenon where the electrical resistance of a material varies with mechanical stress).
These piezoresistors are arranged in a Wheatstone bridge configuration—a balanced circuit that converts subtle resistance changes into measurable voltage signals. Under no pressure (zero load), the bridge is balanced, producing a zero output voltage; when pressure is applied, the bridge unbalances, generating a voltage proportional to the pressure magnitude.

2. Signal Conditioning & Amplification

The weak analog voltage signal from the Wheatstone bridge (typically millivolt-level) is processed by an on-board signal conditioning module to ensure accuracy and stability:

Amplification: A low-noise operational amplifier boosts the weak signal to a standard, usable range (compatible with industrial control systems).
Linearization: Non-linearities in the raw sensor output (caused by diaphragm material properties) are corrected via a built-in digital signal processor (DSP), ensuring the output signal has a linear relationship with the input pressure (linearity error ≤ ±0.25% full scale).
Temperature Compensation: The sensor incorporates a temperature sensor (NTC thermistor) to monitor ambient and media temperatures (operating range: -40°C to 125°C). The DSP uses pre-calibrated compensation algorithms to offset temperature-induced drift in the piezoresistive element, maintaining measurement accuracy across extreme temperature variations.

3. Output Signal Generation

RD-B040EAIZ-62 is configured with a 4–20 mA current loop output (a standard industrial signal format), offering advantages such as anti-interference and long-distance transmission:

At 0 bar (minimum pressure), the sensor outputs 4 mA (zero signal).
At 40 bar (full-scale pressure), the output rises to 20 mA (full-scale signal).
Intermediate pressures correspond to proportional current values (e.g., 20 bar = 12 mA), allowing the controller (e.g., PLC, DCS) to directly interpret the signal as pressure data.
The current loop is powered by an external 12–24 V DC supply, with low power consumption (max 30 mA) ensuring compatibility with energy-constrained systems.

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