Jun. 30, 2025
When designing and incorporating mesh filters, there are three elements to the mesh that your mesh supplier needs to know to ensure your filter works as intended. Wire diameter, opening size, and mesh count all play a role in the effectiveness of a mesh filer.
Goto Dashang to know more.
When designing a mesh filter, a “good, better, best system is used. The “good” category illustrates when one of the three elements listed is provided. “Better” illustrates your ability to provide two elements, and “best” illustrates your ability to provide all three.
So, let’s say you send the mesh supplier a quote request for 200 feet of filter cloth with a mesh count of 50 microns. While the mesh supplier can provide an adequate recommendation, the inquirer’s exact needs remain unknown.
NOTE: Designing a woven wire filter may require you to convert mesh count to micron rating and vice versa. Use the following chart as a tool to help you comminate the needs of your operation:
If you were to submit a request for a 60x60 mesh filter with a wire diameter of ., the mesh supplier would have enough information to identify the mesh count and wire diameter. In turn, the mesh supplier can also calculate the opening size.
To that end, if any two elements are provided, the third can be determined; however, for best results, you should have all three ready before reaching out to the mesh filter supplier.
Read "Wire Mesh Filters: What You Need To Know Before You Buy" for insight into the mesh filter buying process.
Sample Request
Woven wire mesh filter are a big investment. To ensure you are satisfied and confident with bulk orders, you have the opportunity to request samples of both cut pieces and fabricated components.
To do so, you must reach out and provide the following information:
Having said that, there are a few limitations to note. As quantity plays a significant role in the feasibility of a sample request, we will need to establish the resources and labor your request requires.
Typically, if a woven wire supplier doesn't have the capacity to produce the desired component or specification, your sample request will get turned down. Your request can also get turned down if the rest volume doesn't align with the amount of tooling and labor needed to produce the component.
When it comes to cost, the amount you can expect to pay depends of the form factor of the sample.
If you are simply looking for cut-to-size pieces to familiarize yourself with a particular specification, the price tag will be fairly inexpensive. Of course, the price will depend on the various parameters of the specification.
If you are looking to sample a custom component, however, the expected cost will spike significantly. This is due to the increased labor needed to set up the tooling and fabricate the component.
NOTE: The expected cost of a customized part will increase as the complexity of the part increases.
If after testing the requested sample you find the performance does not meet your expectations, you should set a meeting with the mesh supplier's engineering team. This will give you the opportunity to identify the reason where improvements can be made.
Maybe it's as simple as switching someihng like the weave pattern or alloy. Or maybe you discover that woven wire mesh isn't the answer.
Either way, it is critical that you sit down with the engineering team so you can coordinate your next steps.
Now, if you are satisfied with how the component turned out, you will want to establish how many finalized parts you will need. After you decide and determine whether you will need a purchase order or blanket order, the next step would be to request a quote.
Once you receive a quote, approve it, and submit a purchase or blanket order, production will start.
You can use one of the following avenues to request a quote:
We live in a digital world, filled with an ever-increasing number of electronic devices. This, coupled with demanding Electromagnetic Compatibility (EMC) Engineering regulations, has resulted in increasing demand for EMI / RFI shielding materials.
Further reading:Contact us to discuss your requirements of Non ferrous metal woven mesh. Our experienced sales team can help you identify the options that best suit your needs.
Locker Woven Wire Mesh is used to protect against Electromagnetic Interference (EMI) for varying applications. Mesh can be supplied as rolls, cut to size pieces, or as fabricated parts to suit individual requirements.
In the majority of cases Copper Wire mesh is recommended for EMI / RFI Shielding.
Electromagnetic interference (EMI) shielding is put in place to attenuate (reduce the intensity of) RFI / EMI. Generally, a full enclosure around a component is formed using this shielding material, attenuating EM waves both leaving and entering.
In this way the shield protects the component in question from outside interference and significantly reduces any EM leakage. There are two ranges of electromagnetic shielding: Magnetic shielding and radio frequency shielding. By far the least common is of the two is Magnetic Shielding, used to protect against strong magnetic forces at low frequencies (anything below 100KHz). By utilising material with high magnetic permeability (such as Mu-metal or iron/steel), magnetic shielding attracts and then redirects magnetic fields away from whatever is being shielded. Strong magnetic forces are typically prevalent in areas with strong electric current, such as power plants or transformer rooms. These magnetic forces can be damaging to the health of a human. High frequencies (anything above 100KHz) require “Radio Frequency” shielding. Radio Frequency shielding utilises materials with high conductivity with very little magnetic permeability (such as copper mesh) to apply the Faraday effect to EM waves. All instances of EMI RFI listed in the earlier section are in the radio frequency range.
EMI / RFI shielding should be used in all the critical systems mentioned earlier, but there are also many other applications. Consumer electronic devices, sometimes referred to as PED’s (personal electronic devices) utilise EMI shielding to reduce any EMI from other nearby electronics, as well as prevent any EM leakage which could affect other electronics. The management and design of these systems are a subset of electrical engineering referred to as EMC Engineering. MRI rooms in hospitals are encased in shielding to prevent any RFI from distorting the images being produced. Shielding can even be used to line rooms in order to limit the use of mobile phones! Entire buildings are sometimes encased in electromagnetic shielding in order to prevent the emission or intrusion of EM radiation. For example, governments may choose to encase their foreign embassies in EMI shielding to prevent spying. Some keyboards emit EM radiation with every keystroke, which can be monitored from distances of up to 20m. If you don’t believe it, ask Gene Hackman, In the film Enemy of the State, he plays a former intelligence agent, who masks his electronic activities from the intelligence community via the clever installation of copper wire mesh as EM shielding. Other applications include:
Material Properties
The majority of EMI / RFI shielding works best with highly conductive material.
Copper has excellent thermal and electric conductivity, but not as good as silver.
Silver is in fact the most conductive naturally occurring material. So, from that perspective only, it should theoretically be the best material for creating an EMI / RFI shield.
We use copper due to its more favourable price, availability and malleability (the ease with which it is woven into a mesh and manipulated into different shapes).
It is a common misconception that EM shielding completely eradicates EM radiation. The intensity of an EM wave is measured in Watts. EMI shielding reduces the signal intensity of electromagnetic waves passing through it. The degree to which it does this is referred to as the attenuation and is measured in Decibels (dB) on a logarithmic scale (base 10). i.e. A reduction in signal intensity by a factor of ten (10x) is a 10dB attenuation. A reduction in signal intensity by a factor of 100x is 20dB of attenuation, etc. Therefore, if a radio wave is measured at 20 milliwatts before shielding, and then 2 milliwatts after passing through shielding, then there is 10dB of attenuation. If the wave goes from 20 milliwatts to 0.2 milliwatts then there is 20dB of attenuation. 20 milliwatts to 0.02 milliwatts is 30dB, and so on. Care should be taken when companies claim to offer materials which “shield 99% of EM radiation”.
A range of frequencies should always be specified along with any claim. Without the frequency range the claim applies to, the material could be useless against the EMI frequency you are trying to shield against! Secondly, 99% shielding is only 20dB of attenuation. Across many applications, the minimum attenuation acceptable is generally 99.99% shielding. i.e. 40dB of attenuation. People often assume that a product which offers 40dB of attenuation is twice as good as 20dB of attenuation. This is not the case, it is in fact 100x better. The actual level of attenuation is measured using an EMF meter. First a signal strength baseline is determined without shielding in place, then a second signal strength measurement is taken with the shielding in place. You will need a meter that measures the correct electromagnetic subset, magnetic, or EM / radio frequency. Any claims presented as facts should be based on tests undertaken by independent experts who were conducted testing off site.
Want more information on industrial filter mesh? Feel free to contact us.
If you are interested in sending in a Guest Blogger Submission,welcome to write for us!
All Comments ( 0 )