German HYDAC pressure sensor HDA4745 series sales agent

HYDAC pressure sensor HDA4745 series sales agent

Pressure sensors are commonly used sensors in industrial practice, applied in various industrial automation environments, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automation, aerospace and petrochemical, oil wells, electricity, ships, machine tools, pipelines and many other industries. The representative commonly used model series of HYDAC pressure sensors include HDA4840 series, HDA4700 series, HDA4400 series, HDA7400 series, etc. Users can choose from multiple accuracy levels, pressure ranges, connection methods, and output methods. The diverse installation design, multi range pressure range, multiple output forms, stable anti-interference performance, EMC performance, and robust sensor chip design of HYDAC pressure sensors make them highly favored by users in the industrial field. There are many methods for measuring force values, including methods that are in equilibrium with known gravity, as well as various physical phenomena that are proportional to force, such as elasticity, pressure, and magnetostriction effects. The common methods of force measurement can be summarized into two types: utilizing the dynamic effects of force and the static effects of force. ① Measure force values using dynamic effects. In the gravitational field, the Earth's gravity causes objects to produce gravity, that is, weight. Therefore, the weight of an object of known mass at a certain point in the gravitational field can be used to measure force. ② Measure force values using static effects. The static effect of force causes deformation of an object. If an object is an elastic body, according to Hooke's law, its deformation is proportional to the applied force within the elastic range. In this way, by measuring the deformation, the magnitude of the force can be determined. A pressure sensor is a pressure measuring device that has a housing, a metal pressure interface, and a high-level signal output. Many sensors are equipped with circular metal or plastic housings, with a cylindrical appearance, one end being a pressure interface and the other end being a cable or connector. This type of heavy-duty pressure sensor is commonly used in temperature and electromagnetic interference environments. Customers in the industrial and transportation fields use pressure sensors in their control systems to measure and monitor the pressure of fluids such as coolant or lubricating oil. At the same time, it can also detect pressure spike feedback in a timely manner, detect system blockages and other issues, and find solutions in real time. Pressure sensors are widely used as a type of sensor. Traditional pressure sensors are mainly composed of mechanical structural components, which indicate pressure through the deformation of elastic elements. However, this structure is large in size and heavy in weight, and cannot provide electrical output. With the development of semiconductor technology, semiconductor pressure sensors have also emerged. Its characteristics are small size, light weight, high accuracy, and good temperature characteristics. Especially with the development of MEMS technology, semiconductor sensors are moving towards miniaturization, with low power consumption and high reliability.

The two-wire system for pressure sensors is relatively simple, and most customers know how to wire it. One wire is connected to the positive pole of the power supply, and the other wire, which is the signal wire, is connected to the negative pole of the power supply through the instrument. This is simple. The three wire system for pressure sensors adds a wire on top of the two-wire system, which is directly connected to the negative pole of the power supply, which is a bit more complicated than the two-wire system. The four wire pressure sensor definitely has two power input terminals, and the other two are signal output terminals. Four wire systems are mostly voltage outputs rather than 4-20mA outputs. 4-20mA transmitters are called pressure transmitters, and most are made into two-wire systems. The signal output of some pressure sensors is not amplified, with a full-scale output of only a few tens of millivolts, while some pressure sensors have amplification circuits inside, with a full-scale output of 0-2V. As for how to connect to the display instrument, it depends on the instrument's range. If there is a gear that is suitable for the output signal, it can be directly measured, otherwise a signal adjustment circuit needs to be added. The difference between five wire pressure sensors and four wire sensors is not significant, and there are relatively few five wire sensors on the market. Metric threads are represented by pitch, while American and British threads are represented by the number of threads per inch. This is the difference in the size of pressure sensor threads. Metric threads have a 60 degree equilateral profile, British threads have an isosceles 55 degree profile, and American threads have a 60 degree profile. Metric threads are measured in metric units, while American and British threads are measured in imperial units. Pipe threads are mainly used for connecting pressure pipelines, with tight fit between internal and external threads. Pressure sensor pipe threads come in two types: straight pipe and tapered pipe. The nominal diameter refers to the diameter of the pressure pipeline connected, and obviously the larger diameter of the thread is larger than the nominal diameter. 1/4, 1/2, and 1/8 are the nominal diameters of imperial threads, measured in inches.

HYDAC pressure sensor HDA4745 series sales agent

The working principle of pressure sensors is also based on the piezoresistive effect. Using the principle of piezoresistive effect, the pressure of the measured medium directly acts on the diaphragm of the sensor (stainless steel or ceramic), causing the diaphragm to produce a micro displacement proportional to the medium pressure, resulting in a change in the resistance value of the sensor. The electronic circuit is used to detect this change and convert it into a standard measurement signal corresponding to this pressure. Using the principle of strain resistance, silicon sapphire is used as the semiconductor sensitive element, which has metrological characteristics. Therefore, semiconductor sensitive components made of silicon sapphire are insensitive to temperature changes and have good working characteristics even under high temperature conditions; Sapphire has strong anti radiation properties; In addition, silicon sapphire semiconductor sensitive components have no p-n drift. Due to the constant vertical offset of the pressure sensor throughout the entire pressure range, changes in the diffusion of the transducer and laser adjustment correction will result in offset errors. Next is sensitivity error: the magnitude of the error is proportional to the pressure. If the sensitivity of the device is higher than the typical value, the sensitivity error will be an increasing function of pressure. If the sensitivity is lower than the typical value, the sensitivity error will be a decreasing function of pressure. The reason for this error is due to changes in the diffusion process. The third is linear error: this is a factor that has a relatively small impact on the initial error of the pressure sensor. The cause of this error is the physical nonlinearity of the silicon wafer, but for sensors with amplifiers, the nonlinearity of the amplifier should also be included. The linear error curve can be a concave curve or a convex curve for weighing sensors. Lag error: In most cases, the lag error * of pressure sensors can be ignored because silicon wafers have high mechanical stiffness. Generally, hysteresis error only needs to be considered in situations where there is a significant change in pressure. The four errors of pressure sensors cannot be avoided. We can only choose high-precision production equipment and use new technologies to reduce these errors. We can also perform certain error calibration at the factory to minimize errors as much as possible to meet customer needs.

HDA4840-A-350-424(15m)

VD 8 D.0 /-W-L110

VM 2 B.1 /-V

HDA4346-A-0010-AN1-000-F1

VD 2 GC.0 /-W-123

D633-509B

EDS3148-5-01,0-000-F1

8.5883.5422.G321

VD 8 C.0 /-V-CRUUS

D662-P01JAMF6VSX2-A

VR 2 LZ.1 /-V-CN

VD 5 D.0 /-V-L24

VR 5 B.1

V02 2 VZ.0 /-V

8.A02H.5531.1024

HDA 4346 -a- 02, 5 - 000 -f 1

EDS3316-1-0016-000-F1

VR 2 GC.0 /-V-113

8.0010.4100.0000

8.5800.1262.1024

D633-333B-R16KO1FONSS2

HDA4745-A-0016-AH1-000

D633-D2500B/RXXKX1FONSS2

VD 5 LZ.1 /-BO-TA

EDS1792-P-016-009(145PSI)

VMF 2.5 D.1 /-L24

8.5810.1241.0512

8.5800.1262.1024

D661-4085P60HAAF6VSX2B

VD 2 D.0 /-V-LED

VM 0.8 D.0 /-V-L220

VD 5 D.0 /-W-L24-SO135

8.5820.0H40.4096.5093.0015

HDA4840-B-315-424(10m)

D661-4538C/G35JOAA4VSX2HA

VD 8 D.0 /-V-L24

VRD 2 E.0 /-V

HDA4746-A-250-000

EDS1791-P-040-000

ENS3116-3-0520-000-K

VD 1.5 BM.1 /-2GC

VR 2 GC.0 /-V-113-LED

T8.5820.3862.1024