Selling German ifm Yifumen PK6524 pressure sensor

Selling German ifm Yifumen PK6524 pressure sensorWiring method

IFM sensorThe wiring of sensors has always been one of the most frequently consulted questions during the customer procurement process. Many customers do not know how to connect sensors. In fact, the wiring methods of various sensors are basically the same. Pressure sensors generally have two-wire, three wire, four wire systems, and some even have five wire systems.

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 very simple. The three wire system for pressure sensors adds a wire on the basis 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.

thread type

There are many types of threads for IFM pressure sensors, including NPT, PT, G, and M, all of which are pipe threads.

NPT stands for National (American) Pipe Thread, a 60 degree taper pipe thread that is a standard for pressure sensors in the United States and is used in North America National standards can be found in GB/T12716-1991PT stands for Pipe Thread, which is a 55 degree sealed conical pipe thread belonging to the Wyeth pressure sensor thread family and commonly used in Europe and Commonwealth countries Commonly used in the water and gas pipe industry, the taper is specified as 1:16. National standards can be found in GB/T7306-2000G is a 55 degree non threaded sealed pipe thread, belonging to the Wyeth pressure sensor thread family The symbol G represents cylindrical thread. National standards can be found in GB/T7307-2001M is a metric ordinary thread, such as M20 * 1.5, which means a diameter of 20mm and a pitch of 1.5. If the customer has no special requirements, the pressure sensor is generally M20 * 1.5 thread.

In addition, the 1/4, 1/2, and 1/8 markings in the thread refer to the diameter of the thread size, measured in inches. Insiders usually refer to thread size in minutes, with one inch equal to 8 minutes, 1/4 inch equal to 2 minutes, and so on. G seems to be the general term for pipe threads (Guan), and the 55 and 60 degree divisions are functional, commonly known as pipe circles. The thread is machined from a cylindrical surface.

ZG, commonly known as pipe cone, refers to a thread that is machined from a conical surface. This is how most water pipe pressure joints are made, and the old national standard is labeled as Rc

Metric threads are represented by pitch, while American and British threads are represented by the number of threads per inch. This is the biggest difference between 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.

Selling German ifm Yifumen PK6524 pressure sensorworking principle

1. Piezoresistive pressure sensor

Resistance strain gauges are one of the main components of piezoresistive strain sensors. The working principle of metal resistance strain gauges is the phenomenon where the strain resistance changes with mechanical deformation due to adsorption on the substrate material, commonly known as the resistance strain effect.

2. Ceramic pressure sensor

Ceramic pressure sensors are based on the piezoresistive effect, where pressure directly acts on the front surface of the ceramic diaphragm, causing slight deformation of the diaphragm. Thick film resistors are printed on the back of the ceramic diaphragm and connected to form a Wheatstone bridge. Due to the piezoresistive effect of the varistor, the bridge generates a highly linear voltage signal that is proportional to the pressure and also proportional to the excitation voltage. The standard signal is calibrated to 2.0/3.0/3.3 mV/V depending on the pressure range, and can be compatible with strain sensors.

3. Diffuse silicon pressure sensor:

Diffuse silicon pressure sensor

Diffuse silicon pressure sensor

The working principle of diffused silicon 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 detects this change and converts it into a standard measurement signal corresponding to this pressure.

4. Sapphire pressure sensor:

By utilizing the principle of strain resistance, silicon sapphire is used as the semiconductor sensitive element, which has excellent performanceThe 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.

5. Piezoelectric pressure sensor:

pressure sensor

pressure sensor

The piezoelectric effect is the main working principle of piezoelectric sensors. Piezoelectric sensors cannot be used for static measurements because the charge generated by external forces is only preserved when the circuit has an infinite input impedance. The actual situation is not like this, so this determines that piezoelectric sensors can only measure dynamic stress.