prox switch controls?

 
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plumberman
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Posts: 264
Joined: Sun. Apr. 14, 2013 2:45 am
Location: andes ny
Stoker Coal Boiler: coal gun 130
Coal Size/Type: pea
Other Heating: solar dhw/samsung mini split/oil

Post by plumberman » Sun. Jan. 06, 2019 1:12 pm

Went with photoeye.

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lsayre
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Posts: 21781
Joined: Wed. Nov. 23, 2005 9:17 pm
Location: Ohio
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Lehigh Anthracite Pea
Other Heating: Resistance Boiler (13.5 KW), ComfortMax 75

Post by lsayre » Sun. Jan. 06, 2019 2:19 pm

What model #?

 
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plumberman
Member
Posts: 264
Joined: Sun. Apr. 14, 2013 2:45 am
Location: andes ny
Stoker Coal Boiler: coal gun 130
Coal Size/Type: pea
Other Heating: solar dhw/samsung mini split/oil

Post by plumberman » Sun. Jan. 06, 2019 3:07 pm

allen Bradley grp-9002-5


 
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lsayre
Member
Posts: 21781
Joined: Wed. Nov. 23, 2005 9:17 pm
Location: Ohio
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Lehigh Anthracite Pea
Other Heating: Resistance Boiler (13.5 KW), ComfortMax 75

Post by lsayre » Sun. Jan. 06, 2019 4:38 pm

Does it send out a beam of light from the sensor mounted on the wall and see (or not see) coal through the plexiglass (or real glass) window in the hopper?

 
User avatar
plumberman
Member
Posts: 264
Joined: Sun. Apr. 14, 2013 2:45 am
Location: andes ny
Stoker Coal Boiler: coal gun 130
Coal Size/Type: pea
Other Heating: solar dhw/samsung mini split/oil

Post by plumberman » Mon. Jan. 07, 2019 5:27 am

sends out infrared beam threw plexi glass window and back to itself. if no return contact close and starts adjustable timer relay. sees coal contact opens an shuts off.

 
User avatar
lsayre
Member
Posts: 21781
Joined: Wed. Nov. 23, 2005 9:17 pm
Location: Ohio
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Lehigh Anthracite Pea
Other Heating: Resistance Boiler (13.5 KW), ComfortMax 75

Post by lsayre » Mon. Jan. 07, 2019 5:31 am

Nice! Do you think it will be affected if any coal dust gets on the Plexiglas? Ballpark cost?

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