1. Product Overview
The single crystal silicon pressure transmitter is a high-precision pressure measurement instrument based on single crystal silicon resonant sensing technology, which is suitable for industrial process control, petrochemicals, power, water treatment, pharmaceuticals and other fields. Its core adopts a single crystal silicon piezoresistive sensor, which features outstanding stability, anti-interference ability and long-term reliability.
2. Core Features
Characteristic description
High-precision typical accuracy ±0.075% FS, with the maximum reaching ±0.05% FS (full scale)
The annual drift of long-term stability is less than ±0.1% FS, and the calibration frequency is reduced
Wide temperature range, suitable for operating temperature from -40℃ to +85℃ (high-temperature type up to +125℃ is optional)
It has strong overload resistance and can withstand 200% FS overvoltage, protecting the sensor from damage
Low-power 4-20mA two-wire power supply, supporting HART/RS485/Modbus communication
Explosion-proof certification can be selected from explosion-proof grades such as Ex d IIC T6 (flameproof) and Ex ia IIC T4 (intrinsically safe)
The corrosion-resistant liquid contact parts can be selected from 316L stainless steel, Hastelloy C276, and tantalum diaphragms
3. Technical parameters
Project parameters
Measuring range gauge pressure (G) : 0 to 100kPa to 100MPa
Absolute pressure (A) : 0-10kPa - 40MPa
Differential pressure (D) : 0-1kPa to 10MPa
Output signal: 4-20mA + HART/RS485 Modbus/Wireless (optional)
Power supply voltage: 12-36V DC (standard two-wire system)
Medium compatibility: gas, liquid, steam (Special materials should be selected for corrosive media)
Protection grade: IP67 (standard), IP68 (optional)
Process connection G1/2", M20×1.5, 1/2" NPT, etc. (customizable and optional)
The display mode can be selected as LCD or OLED screen (with units and real-time curves).
4. Working Principle
The single crystal silicon pressure transmitter adopts MEMS (Micro-Electromechanical Systems) technology:
Pressure sensing: The medium pressure acts on the monocrystalline silicon sensor, causing slight deformation of the silicon diaphragm.
Wheatstone bridge: The piezoresistive effect causes the resistance of the bridge circuit to change, outputting a voltage signal at the mV level.
Signal processing: Dedicated ASIC chips are used for temperature compensation and linearization correction, outputting standard 4-20mA or digital signals.
5. Application Scenarios
Oil & Gas: Wellhead pressure monitoring, pipeline leakage detection
Chemical process: Pressure control of reaction vessels, measurement of corrosive media
Power industry: Boiler drum pressure and steam flow measurement
Water treatment: Pressure monitoring in pumping stations, differential pressure measurement in sewage treatment
Medical equipment: Oxygen tank pressure monitoring (medical-grade certification optional)
