piezoresistive pressure core
The HM1902 pressure sensor adopts a silicon piezoresistive sensor chip with good consistency and strong stability, and is made by the stainless steel corrugated membrane isolation oil filling process; Secondly, the circuit uses pure analog signals and has high sensitivity output. It has advantages such as fast response time, low signal noise, strong anti-interference ability, high reliability, and low cost.
At the same time, the core comes with an NTC temperature sensor, which allows users to directly measure the temperature and use it as temperature compensation for pressure sensors.
Function and Features
Pure analog signal with low noise.
High sensitivity (can reach 141 ± 5mV at 25 ºC and 10bar).
Suitable for measuring media compatible with copper(suitable sealing rings need to be selected).
High reliability, high stability, high consistency, and a service life generally exceeding 5 years.
Compact size.
Product parameters
|
Minimum value |
Typical value |
Maximum value |
Company |
Remarks |
| Range range |
|
10 |
|
bar A |
customizable |
| Excitation voltage |
3 |
5 |
7.5 |
V |
|
| Bridge impedance |
|
5 |
|
KΩ |
|
| Zero output @ 5V |
-10 |
|
15 |
mV |
Zero position at atmospheric pressure |
| Sensitivity output |
2.72 |
2.82 |
2.92 |
mV/bar/V |
Good batch consistency |
| response time |
1 |
|
|
mS |
|
| linear |
-0.5 |
|
0.5 |
%FS |
|
| Hysteresis |
-0.25 |
|
0. 25 |
%FS |
|
| Repeatability |
-0.25 |
|
0. 25 |
%FS |
|
| Zero temperature coefficient |
-0.07 |
|
0.07 |
%FS/°C |
Good batch consistency |
| Full temperature coefficient |
-0.29 |
-0.255 |
-0.21 |
%FS/°C |
Good batch consistency |
| Long term stability |
|
1 |
|
%FS/ year |
|
| Overload pressure |
|
20 |
|
bar |
|
| Destruction pressure |
50 |
|
|
bar |
|
| Medium temperature |
-20 |
|
105 |
°C |
The measurement medium cannot be frozen |
| Storage temperature |
-40 |
|
85 |
°C |
|
Boundary dimensions and pin definitions
Matters needing attention
The measuring medium cannot be frozen;
During installation, avoid scratching the O-ring seal;
During installation, the direction of the pressure inlet should face downwards as much as possible to prevent impurities from settling in the medium and blocking the pressure inlet;
The power supply needs to be filtered to prevent damage to this product caused by instantaneous high currents;
If there are obvious surges in the product's operating environment, it is necessary to add protective circuits such as TVS tubes;
Avoid falling, hitting, and puncturing hard objects;
Avoid product exposure to water and strictly prohibit water immersion;
It is strictly prohibited to disassemble the casing to avoid product damage.
Disclaimer
Use of media beyond regulations;
Exceeding the specified power supply voltage for use;
Use beyond the specified temperature range;
Use beyond the specified pressure range;
Severe deformation or damage to the isolation membrane caused by improper operation;
Force majeure, such as product damage caused by lightning strikes, etc;
Other product damage caused by failure to use in accordance with the requirements of this specification.
Jiangmen Ever-smart Intelligent Control Instrument Co., LTD. Founded in 2013, covering an area of 1500 square meters, we are an intelligent manufacturing enterprise that integrates product design, research and development, production, and sales. Our core team has been deeply involved in the field of instruments and meters for more than 20 years.
Since its establishment, our company has been deeply involved in the fields of instruments, sensors, testing equipment, and automation control systems. Currently, our products have covered various categories such as pressure sensors, high-precision digital pressure gauges, high-precision detectors, high-precision pressure controllers, and automated production pressure calibration systems, and continue to develop in a series. At present, we have formed an annual production and quality assurance capacity of 1 million pressure sensor products, and are equipped with a professional product research and development team. Our sales channels cover various parts of the country, the Middle East, Europe, the Americas, and Southeast Asia.
The company has always adhered to the principle of "professional creation of high-quality products, sincere realization of win-win", and always adheres to creating maximum value for customers with leading technology.
Looking towards the future, Hengmin Company will continue to advance, driven by technological innovation and guided by market demand, and strive to create more distinctive brands.
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