Automated filter tester AFT-140

What is difference between AFT140 and AFT100 or other machines with laser Particle counter?

Dear Sir,

Thank you for your email, I think we should introduce what is truth for Filter tester for your ref.

1. Who is making these machines?

Before COVID-19, around of China, I think there only 5-6 factories, Who makes AFT-140 or AFT-100 AUTOMATIC FILTER TESTER with different model name. total production of this machine is less than 80 set per year.  But till now, I think more than 20 factories which start to produce this machine. More than 800 sets of machine were made from 2020-Feb-10 till now.

I used to visit Alibaba, I found 100 suppliers, but more than 97% is not the real manufacturer.

2. What is the difference between AFT140 and AFT-100 or other models?

In these 20-producers, only two make machines with aerosol spectrophotometer including us, all of others producer are using Laser particle counter, like our machine AFT-100.

In EN143, En149, Niosh CFR42 Part 84.181, they need aerosol spectrophotometer to check the particle density, instead of Laser particle counter to check the number of particle.

Only using aerosol spectrophotometer, the testing result can compare with TSI 8130A.

So now in China, many factories which make masks, or melt-blown fabric for mask and Gown, they start to refuse filter testing machine with Laser particle counter. So now we are very short aerosol spectrophotometers, we start to search this sensor parts around the world.

What difference of AFT140 with aerosol spectrophotometer and AFT-100 with Laser particle counter?

aerosol spectrophotometer can measure the particle with size of 75nm—10μm, and the result is μg/m³ or mg/m^{3 ,} but laser particle counter only can measure the particle with size of 300nm—10μm.So these two testing result is not same, and is not comparable. As in second method, you do not know how much particles with the size from 75nm to 300nm.

3. What is the real Price?

For the machine with Laser particle counter, now in China, from USD18,000-30,000, previously, this price is about 13,500-20,000 in Max.

As I know, in all of these machines, some supplier nearly know nothing about the testing, they just make a black box, then show the same figure of testing result to cheat the operator in its screen, as the sensor is very bad. It is impossible to measure the efficiency of the filter.

For the machine with aerosol spectrophotometer, as in one machine, there are 2- aerosol spectrophotometer, so price is nearly fixed, about USD60,000, before COVID, the price is about USD48,000-52,000. Normally, in AFT-140 with two Aerosol-generators.

Sometimes, some customers perhaps need only one generator with NaCl Aerosol.

I believe the price of AFT-140 may be increased in next 2-month, as now is very short of aerosol spectrophotometer.

Hopefully,  at the end of 2020, I think AFT-140 will come back to its original price.

Automated filter tester AFT-140 

Automated filter tester is special designed for mask test.There are 2EA Aerosol Generator in one unit.One is for Salt testing ,the Nacl liquid concentration is 10%.Aerosol rate complies to standard. Counter median diameter: 0.075±0.02μm,Particle size

distribution of Geometric standard deviation is less than 1.86.The other is for Oil testing. You can select DOP,DEHS ,PAO, Parffin Oil etc. Aerosol rate complies to standard. Counter median diameter:0.185±0.02μm,Particle size distribution of Geometric standard deviation is less than 1.6.

Follows are features of Automated filter tester 

• There are 2EA Photometers, Aerosol concentration test rang: 0.001-100mg/m3.
• The filter tester not only can test efficiency and resistance, but also can apply to test particulate respirator filters at loading.
• Consumptive material at test:Nacl(AR),DEHS or Paraffin Oil.
• Electronic Balance:max range 100-500g，min resolution: 0.001g. Counting cup or graduate
• cylinder spec.:max value 1000ml-2000ml
• meet with USA commercial respirator regulation (NIOSH 42 CFR part 84)
• meet with European EN 143 and related respirator standards
• For more information,you can visit https://fyitester.com