SI-1180 General Purpose Silicon Piezoresistive Pressure Sensor

General Purpose Silicon Piezoresistive Pressure Sensor

Silicon Piezoresistive Pressure Sensor is suitable for all: Water pressure, air pressure, oil pressure, hydraulic pressure.

SI-1180 General Purpose Silicon Piezoresistive Pressure Sensor is composed of diffused silicon sensor and signal module. It uses the piezoresistive effect of semiconductor silicon material to realize the conversion of pressure and electrical signals. Convert the sensor signal to a standard current or voltage signal output, which can be directly connected to the computer, control instrument, display instrument, etc.

Features of SI-1180 General Purpose Silicon Piezoresistive Pressure Sensor

  • Liquid, gas and steam can be used.
  • Easy to install. Small in size and light in weight. It can be installed directly at any position.
  • High precision, stainless steel construction
  • Reverse polarity protection and instantaneous overcurrent overvoltage protection
  • Wide measuring range, can measure gauge pressure, absolute pressure and sealed gauge pressure
  • Protection class IP65
  • Hessmann output optional 4-digit LED display
  • Strong anti-interference, good long-term stability

General Purpose Silicon Piezoresistive Pressure Sensor Specifications

Measuring medium:Various liquids, gases and steams compatible with 304, 316L stainless steel
Range: -100kPa…0-0.01…100MPa
Overload:1.5 times full scale pressure
Pressure Type:Gauge or Absolute or Sealed Gauge
Long-term stability:±0.2%FS/year
Isolation diaphragm:316L
Zero temperature coefficient:±0.03%FS/°C (reference 25°C)
Full scale temperature coefficient:±0.03%FS/°C (reference 25°C)
Working temperature:-30~85°C (common type); -20~60°C (flameproof type); -10~60°C (intrinsically safe type)
Storage temperature:-40~120℃
Power supply:24VDC (12~38V)
Output signal:two-wire system 4 ~ 20mA current or three-wire system voltage
Insulation resistance:100MΩ; 500VDC
Shell protection:IP65
Electrical connection:Hessmann connector or special shielded cable 1.5 meters

Structure Materials
Shell: stainless steel 1Cr18Ni9Ti or 316L
Diaphragm: stainless steel 316L
O-ring: Viton

Order Guide

SI-1180  Silicon Piezoresistive Pressure Sensor
Code Range
(0~X)KPa -100kPa…0-0.01…100MPa
Code Output Signal
B1 4-20mA
B2 0-10mA
B3 0-10V
B4 0-5V
B5 1-5V
B6 0.5-4.5V
Code Process Connection
P1 M20*1.5
P3 G1/4
P4 G1/2
Code Electrical connections
C1 Hirschman joint
C2 cable output
C5 M12*1
Code Structure Material
Diaphragm Interface Shell
M1 316L Stainless steel Stainless steel
M1A 316L 316L Stainless steel
M1B 316L 316L 316L
M2 Titanium Titanium Titanium
M3 Tantalum customize customize
M4 Hastelloy C customize customize
Code Additional functions
G Gauge pressure (default)
A Absolute pressure
S Sealed gauge pressure
v Viton O-ring (default)
j Ding eye 0 ring
ED EPDM  O-ring
HB HNBR Hydrogenated Nitrile O-ring
h All welded, no O-rings
D1 LED display
V1 Power supply 24VDC
V5 Power supply 5VDC
SI-1180 (0-10)kPa B1 P1 C1 M1 GV1


The piezoresistive pressure sensor is formed by utilizing the piezoresistive effect of single crystal silicon.

The single crystal silicon chip is used as the elastic element, and the integrated circuit technology is used on the single crystal silicon diaphragm. Diffusion of a group of equal-value resistors in a specific direction of single crystal silicon. Connect the resistors into a bridge. , the monocrystalline silicon wafer is placed in the sensor cavity.

When the pressure changes, the single crystal silicon strains. The strain resistance directly diffused on it produces a change proportional to the measured pressure. Then the corresponding voltage output signal is obtained by the bridge circuit.

When the sensor is in the pressure medium, the medium pressure acts on the corrugated diaphragm. The silicone oil in it is under pressure.

Silicone oil senses the pressure of the diaphragm to the semiconductor core. After being pressed, its resistance value changes, and the resistance signal is drawn out through the lead wire.

The stainless steel bellows diaphragm housing senses the pressure and protects the core. Therefore, piezoresistive pressure sensors can sense pressure signals in corrosive media.

A piezoresistive pressure sensor is generally connected to a Wheatstone bridge through leads.

Normally, the sensitive core has no external pressure, and the bridge is in a balanced state (called zero position). When the chip resistance changes after the sensor is pressed, the bridge will lose its balance.

If a constant current or voltage power supply is added to the bridge, the bridge will output a voltage signal corresponding to the pressure. In this way, the resistance change of the sensor is converted into a pressure signal output through the bridge.

Appearing in most pressure sensors, the method of manufacturing integrated circuits is used to form four resistance strips with equal resistance values, and connect them to form a Wheatstone bridge.

The Wheatstone bridge uses constant current power supply, so that the output of the bridge is not affected by temperature, and the Wheatstone bridge detects the change of the resistance value. After being amplified by the output amplifier. After the conversion of voltage and current, it is converted into a corresponding current signal.

The current signal is compensated by a non-linear correction loop. That is to say, a standard output signal of 4~20mA is generated in which the input voltage has a linear corresponding relationship.

Applications of piezoresistive pressure sensors:

  • Aerospace engine test system;
  • Hydraulic, marine, diesel engine industries;
  • Medicine, biochemistry, fermentation detection system;
  • Automatic control and detection system;

Most pressure sensors currently installed in the field are based on MEMS technology and utilize piezoresistive or capacitive measurement principles.

Measuring principle of capacitive sensor technology:

Two parallel and electrically isolated conductive plates are required for effective operation of capacitive pressure sensors. The bottom plate is fixed, while the top is sensitive to pressure changes. When pressure is applied, the top plate (or membrane) flexes and develops a capacitance Δ. This change in capacitance is then converted into an electrical signal that can be read and regulated by an ASIC or microcontroller.

Technical comparison of piezoresistive and capacitive sensors:

Capacitive pressure sensors have many advantages over piezoresistive sensors. Although they may require more complex signal conditioning circuits and calibration algorithms. But they have higher precision and lower total error band.

Additionally, capacitive pressure sensors have low power consumption. Because due to its nature, no DC current flows through the sensor element. Therefore, very low-power sensing systems can be designed and implemented. Only a small bias to the circuit is required from the external reader. making it ideal for remote or implantable medical applications.

More Featured Pressure Sensors

Sino-Inst is a manufacturer of Silicon Piezoresistive Pressure Sensor. We supply more than 10 types of Silicon Piezoresistive Pressure Sensors.

There are many types of pressure sensors, such as resistance strain gauge pressure sensors, semiconductor strain gauge pressure sensors, Silicon piezoresistive pressure sensors, inductive pressure sensors, capacitive pressure sensors, resonant pressure sensors and capacitive acceleration sensors.

But the most widely used is the Silicon piezoresistive pressure sensor. It has extremely low price, high precision and good linearity. This kind of sensor adopts the integration process to integrate the resistance strip on the monocrystalline silicon diaphragm to make a silicon piezoresistive chip. The periphery of the chip is fixed and packaged in the shell, and the electrode leads are drawn out.

Silicon Piezoresistive Pressure Sensor all stainless steel design. Waterproof and breathable design, can measure gauge pressure, absolute pressure and sealed gauge pressure.

Sino-Inst has provided pressure measurement solutions to customers for many years. Our pressure sensor, made in China. Widely exported to the United States, Britain, Germany, South Africa, Norway and other countries.

If you need Silicon Piezoresistive Pressure Sensor, but have technical questions, please feel free to contact our sales engineers.

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    Silicon Piezoresistive Pressure Sensor for Sale | 100MPa

    Silicon Piezoresistive Pressure Sensor is suitable for all: Water pressure, air pressure, oil pressure, hydraulic pressure.

    Product SKU: SI-1180 General Purpose Silicon Piezoresistive Pressure Sensor

    Product Brand: Sino-Inst

    Product Currency: USD

    Product Price: 115

    Price Valid Until: 2029-09-09

    Product In-Stock: InStock

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