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Technical Specifications
| Input | ||
| Measured Variable | Gauge pressure, Absolute pressure, Sealed gauge pressure | |
| Measuring Range | –100 kPa to 0…10 kPa up to 60 MPa | |
| Output | ||
| Analog Output | Output Type | Load Resistance RL |
| 4–20 mA (without display) | RL ≤ (U − 10 V) / 0.02 A | |
| 4–20 mA (with display) | RL ≤ (U − 14 V) / 0.02 A | |
| 0–5 V | RL ≥ 5 kΩ | |
| 1–5 V | ||
| 0–10 V | ||
| Note: U refers to the supply voltage (V). | ||
| Communication Output | RS485 interface, Modbus protocol | |
| Power Supply | ||
| Power Supply | Output Type | Supply Voltage |
| 4–20 mA | 10–32 VDC | |
| 0–5 V / 1–5 V | 8–32 VDC | |
| 0–10 V | 12–32 VDC | |
| RS485 output | 5–30 VDC | |
| RS485 output with 4-digit LCD display | 17–32 VDC | |
| RS485 output with 4-digit 8-segment LED display | 5–28 VDC | |
| Electrical Connection | Hirschmann connector | |
| Performance | ||
| Accuracy | 0.5% FS | |
| Long-term Stability | ±0.2% FS/year | |
| Response Time | Current / voltage output: T90 ≤ 10 ms | |
| RS485 output: T90 ≤ 100 ms | ||
| Temperature Drift | 10 kPa ≤ range ≤ 60 kPa: 2% FS (within temperature compensation range) | |
| 60 kPa < range ≤ 60 MPa: 1.5% FS (within temperature compensation range) | ||
| Compensated Temperature Range | 10 kPa ≤ range < 25 kPa: 0 to 60 °C | |
| 25 kPa ≤ range ≤ 60 kPa: 0 to 70 °C | ||
| 60 kPa < range ≤ 60 MPa: −10 to 70 °C | ||
| Insulation Resistance | 20 MΩ @ 250 VDC | |
| Dielectric Strength | 500 VAC, 50 Hz | |
| Ingress Protection | IP65(Digital display head: IP50) | |
| Process Conditions | ||
| Overload Pressure | 0.035–10 MPa: 150% FS | |
| 10–60 MPa: 125% FS | ||
| Medium Temperature | −20 to 85 °C | |
| Ambient Conditions | ||
| Operating Temperature | −20 to 85 °C | |
| Storage Temperature | −40 to 85 °C | |
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Applications
The Diffused Silicon Pressure Transmitter is widely used for pressure measurement and control in:
Petroleum and oil & gas systems
Chemical processing plants
Steel and metallurgical industries
Electric power and energy systems
Light industrial applications
Environmental protection and monitoring systems
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Measuring principle
The transmitter operates based on the piezoresistive effect of a diffused silicon pressure sensor. When the measured medium applies pressure to the sensor diaphragm, the diaphragm undergoes a micro-displacement proportional to the applied pressure.
This deformation causes a corresponding change in the resistance value of the piezoresistive elements. The electronic circuit detects this resistance variation, amplifies and processes the signal, and converts it into a standardized electrical output proportional to the applied pressure.
