Wireless remote gas meter has the following characteristics epoxy resin wireless charging : - photoelectric direct reading, nuclear technology meter reading accuracy 100%, support remoteValve control, valve control function can realize outdoor valve control, to ensure the safety of charging. - Support ladder gas price, adapt to the ladder gas price and frequent price adjustment epoxy resin wireless charging needs, with arrears prompt function. - With ultra-low power consumption design, easy installation, suitable for large-scale promotion. - Use aluminum-plastic composite pipe for outdoor centralized meter loading to realize meter reading out of the house.
Wireless remote gas meter can be photoelectric direct reading, nuclear technology meter reading accuracy of 100%, wireless remote gas meter can be remote valve control, with valve control function to achieve outdoor valve control to ensure the safety of charging, mainly usedLine, spot meter reading. Wireless remote gas meter ladder gas price, perfect solution ladder gas price, frequent price adjustment, but also has a reminder function, arrearage prompt valve confirmation button, can be self-storage, each storage table code.
Smart gas meter IC card generally has a card arrow, each time must be inserted to the end, and then pull the card after the number is displayed. Wireless remote transmission film gas meter use method is still very simple epoxy resin wireless charging . When the magnet is turned to one of the reed tube positions, the reed tube draws. If the circuit diagram in Figure 4 is configured, the part
Epoxy resin contains double epoxy group, need amine curing agent to participate in the curing reaction, the final product performance and curing agent performance is very large, but in general, the final curing product of epoxy resin is greater than the curing product hardness and strength of unsaturated polyester resin, of course, the price of epoxy resin is twice that of unsaturated polyester resin. Generally do artificial stone will choose unsaturated polyester resin, because the price is cheap.
But in general epoxy resin is the mostThe final curing product is harder and stronger than the curing product of unsaturated polyester resin, and of course the price of epoxy resin is twice that of unsaturated polyester resin. Generally do artificial stone will choose unsaturated polyester resin, because the price is cheap. And do floor, anti-corrosion coating will choose epoxy resin because of its better performance.
To sum up, epoxy resin contains double epoxy, the need for amine curing agent to participate in the curing reaction, the final product performance and curing agent performance is very large, but in general, the final curing product of epoxy resin is greater than the curing product of unsaturated polyester resin hardness and strength, of course, the price of epoxy resin is unsaturated polyester treeDouble the fat. Generally do fiberglass products will choose unsaturated polyester resin, because the price is cheap.
Epoxy resin and unsaturated resin have superior corrosion resistance. The construction of unsaturated resin is simpler than epoxy resin. The heat resistance of epoxy cured material is generally 80 ~ 100℃. The heat resistant varieties of epoxy resins can reach 200 ° C or higher.
1, in general, high frequency can be defined as frequency above 1 GHZ. At present, more high frequency is usedThe circuit board substrate is a fluorine dielectric substrate, such as polytetrafluoroethylene (PTFE), usually called Teflon, which is usually applied above 5GHz. In addition, there are FR-4 or PPO substrates, which can be used for products between 1GHz and 10GHz, and the physical properties of these three high-frequency substrates are compared as follows.
2, high-frequency board refers to a special circuit board with a high electromagnetic frequency, used for PCB in the field of high frequency (frequency greater than 300MHZ or wavelength less than 1 meter) and microwave (frequency greater than 3GHZ or wavelength less than 0.1 meters), is the use of ordinary rigid wire on the microwave substrate copper coated platePart of a circuit board manufacturing process or a circuit board produced by a special processing method. In general, high-frequency boards can be defined as circuit boards with frequencies above 1GHz.
3, the high-frequency plate is usually pressed with FR4 glass fiber board, and the whole sheet of epoxy resin glass cloth is pressed, the color of the whole board is more uniform and bright. The density is higher than the low frequency board. Generally, high frequency boards are used in circuits with frequencies above 1G. Its dielectric constant is the key, must be very small and stable, medium loss is very small, not easy to absorb moisture, heat, corrosion resistance and other excellent performance.
4, PCB high frequency boardIt is a special circuit board for radio frequency (RF) and microwave frequency band applications, requiring better signal transmission performance and anti-interference capability. The following are several common PCB high-frequency plate classification: PTFE (polytetrafluoroethylene) substrate: PTFE is a very common high-frequency plate, with low loss, low dielectric constant and high insulation impedance advantages. Common PTFE substrates are FR-4 substrate PTFE, RO4350B, RO4003C and so on.
5, high-frequency plate is usually pressed with FR4 fiberglass board, and is the whole sheet of epoxy resin glass cloth pressed, the color is wholeThe board is more uniform and bright. The density is larger than the low frequency board, which is the weight focus.
6, high-frequency circuit design on the social, economic environment impact has reduced costs, serious harmonic pollution. After searching the relevant information, the high-frequency circuit board is a special circuit board with a high electromagnetic frequency, and the high-frequency can be defined as a frequency above 1GHz. Its physical properties, accuracy and technical parameters are very high, and it is often used in automotive anti-collision systems, satellite systems, radio systems and other fields.