Model without fan/noise

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Home &rsaquo; Forum &rsaquo; Hardware &rsaquo; Model without fan/noise This topic has 3 replies, 3 voices, and was last updated 4 years, 9 months ago by uRADMonitor. Log In Register Lost Password Viewing 4 posts - 1 through 4 (of 4 total) Author Posts March 25, 2019 at 7:25 am #6497 pfisiParticipant Hi, is there a model planned without a fan or a quiet fan. The current A3 creates a headache in my home office after a while. Thank you. April 1, 2019 at 7:31 pm #6506 uRADMonitorKeymaster I understand that, as I sometimes have a few of them running in parallel. The “Smoggie” has a smaller fan, see datasheet attached. For the A3 it might be possible to increase the sending interval and use powersave. With this setup, the unit will do the measurements, then go to sleep (including the fan) for the amount of time you define. Would this work? December 18, 2021 at 12:44 pm #29125 urradmParticipant Does the same fan noise problem affect other models (especially INDUSTRIAL)? What is fan used for? Is it for generating airflow for PM detector? Or any other purpose? Can it be turned of/disconnected from power when monitor is working without case? (I have A3 model) I’m generally thinking about replacing my A3 with 2 Industrials. But this problem is stopping me from doing that, as I need to use monitors indoors. January 9, 2022 at 7:37 pm #29223 uRADMonitorKeymaster The FAN has a dual purpose: – it pushes air through a narrow path inside the PM sensor – it pushes air across all sensitive elements While an open case (A3 Stevenson shield) can take advantage of the natural air convection, wind, or general air movement, the PM sensor will still need a controlled airflow. So to make this work, the only option to lower noise is to reduce its frequency, using the sleep mode option. On the other hand, the noise itself is ~35dB near the unit, quite low. If you have the A3 you can evaluate that yourself. Author Posts Log In Register Lost Password Viewing 4 posts - 1 through 4 (of 4 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Antispam 2x(3+4)=? Log In

This topic has 3 replies, 3 voices, and was last updated 4 years, 9 months ago by uRADMonitor.

Viewing 4 posts - 1 through 4 (of 4 total)

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March 25, 2019 at 7:25 am #6497

pfisi
Participant

Hi, is there a model planned without a fan or a quiet fan. The current A3 creates a headache in my home office after a while. Thank you.

April 1, 2019 at 7:31 pm #6506

uRADMonitor
Keymaster

I understand that, as I sometimes have a few of them running in parallel. The “Smoggie” has a smaller fan, see datasheet attached. For the A3 it might be possible to increase the sending interval and use powersave. With this setup, the unit will do the measurements, then go to sleep (including the fan) for the amount of time you define. Would this work?

December 18, 2021 at 12:44 pm #29125

urradm
Participant

Does the same fan noise problem affect other models (especially INDUSTRIAL)?

What is fan used for? Is it for generating airflow for PM detector? Or any other purpose? Can it be turned of/disconnected from power when monitor is working without case? (I have A3 model)

I’m generally thinking about replacing my A3 with 2 Industrials. But this problem is stopping me from doing that, as I need to use monitors indoors.

January 9, 2022 at 7:37 pm #29223

uRADMonitor
Keymaster

The FAN has a dual purpose:
– it pushes air through a narrow path inside the PM sensor
– it pushes air across all sensitive elements

While an open case (A3 Stevenson shield) can take advantage of the natural air convection, wind, or general air movement, the PM sensor will still need a controlled airflow.

So to make this work, the only option to lower noise is to reduce its frequency, using the sleep mode option.

On the other hand, the noise itself is ~35dB near the unit, quite low. If you have the A3 you can evaluate that yourself.
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