Formaldehyde value always zero

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Home &rsaquo; Forum &rsaquo; Support &rsaquo; Formaldehyde value always zero This topic has 1 reply, 2 voices, and was last updated 6 years, 2 months ago by uRADMonitor. Log In Register Lost Password Viewing 2 posts - 1 through 2 (of 2 total) Author Posts July 26, 2020 at 12:05 pm #28470 CristianParticipant Hi everyone, I have noticed some time back that my A3 Formaldehyde sensor is always zero and checking behind i`ve noticed that it was always zero. I believe it is not normal as VOC, for example, it is always oscillating? Any advice from Urad team ? Thanks Cristian August 2, 2020 at 6:29 am #28480 uRADMonitorKeymaster As electrochemical sensors have cross-sensitiviy to certain chemicals, you can trigger a false positive using some alcohol . Put a piece of textile soaked in alcohol close to the A3 inlet, and check the formaldehyde readings . They should begin to rise shortly, indicating the sensor is functioning. Author Posts Log In Register Lost Password Viewing 2 posts - 1 through 2 (of 2 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 1 reply, 2 voices, and was last updated 6 years, 2 months ago by uRADMonitor.

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July 26, 2020 at 12:05 pm #28470

Cristian
Participant

Hi everyone,

I have noticed some time back that my A3 Formaldehyde sensor is always zero and checking behind i`ve noticed that it was always zero. I believe it is not normal as VOC, for example, it is always oscillating?

Any advice from Urad team ?

Thanks
Cristian

August 2, 2020 at 6:29 am #28480

uRADMonitor
Keymaster

As electrochemical sensors have cross-sensitiviy to certain chemicals, you can trigger a false positive using some alcohol . Put a piece of textile soaked in alcohol close to the A3 inlet, and check the formaldehyde readings . They should begin to rise shortly, indicating the sensor is functioning.
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