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-   -   Auto-sparge via liquid level sensor on site glass - Project (http://www.homebrewtalk.com/f170/auto-sparge-via-liquid-level-sensor-site-glass-project-377845/)

Sparky 01-01-2013 09:35 PM

Auto-sparge via liquid level sensor on site glass - Project
 
3 Attachment(s)

Just started this build and hope to get some input on the design, mainly need to make sure I have the right relay (see schematic).

Background
I typically take 45-60min for a 5 gallon batch to sparge and up to 2 hours for bigger batches. Adjusting the input/output of the sparge is tedious - I have better things to do than constantly tweeking the valves during this phase. I wanted to build an auto sparge system with the following requirements:

- Non-penetrating of kettle
- Measurement system that will not be in the mash kettle (cleaning, contamination, clogging)
- Easy adjustments
- Reasonably priced components

Solution
For the reasons mentioned above, I wanted to avoid the Blichman auto-sparge and general float switches.
I noticed on HBT that someone mentioned Omron had a site level sensor, but subsequent messages on HBT yielded no results of someone actually doing a build.

However, I was able to find the liquid level sensor from Omron (picture below):
http://www.ia.omron.com/products/family/475/
I have a Blichman 20gal tank and was able to remove the outer (metal) measurement guide. The site glass is 15mm so the E2K-L26MC1 was the appropriate size. These sensors are a NO operation mode. The premise is that they will turn on/off the pump, based on the level of liquid in the site glass. They are easily attached via small zip tie and can be slid up/down the site glass. They can be attached with a separation of >1 3/8" (>35mm), which is perfect for a liquid level bed.

Wiring
See the attached wiring diagram below. I am not sure about the correct relay since I cannot find a wiring diagram of one.
I will be controlling the pump on/off via the two sensors. The relay will be able to handle 120V output so an SSR is not needed.
If someone could help out with the appropriate relay, that would be great.

Cost
(2) used Omron E2K-L26MC1 = $40
(1) relay/base = $25
wiring/plugs = $6
Total cost = ~$71

Photo at bottom of page is existing setup (before any mod).


Sparky 01-01-2013 09:35 PM

Auto-sparge via liquid level sensor on site glass - Project
 
3 Attachment(s)

Just started this build and hope to get some input on the design, mainly need to make sure I have the right relay (see schematic).

Background
I typically take 45-60min for a 5 gallon batch to sparge and up to 2 hours for bigger batches. Adjusting the input/output of the sparge is tedious - I have better things to do than constantly tweeking the valves during this phase. I wanted to build an auto sparge system with the following requirements:

- Non-penetrating of kettle
- Measurement system that will not be in the mash kettle (cleaning, contamination, clogging)
- Easy adjustments
- Reasonably priced components

Solution
For the reasons mentioned above, I wanted to avoid the Blichman auto-sparge and general float switches.
I noticed on HBT that someone mentioned Omron had a site level sensor, but subsequent messages on HBT yielded no results of someone actually doing a build.

However, I was able to find the liquid level sensor from Omron (picture below):
http://www.ia.omron.com/products/family/475/
I have a Blichman 20gal tank and was able to remove the outer (metal) measurement guide. The site glass is 15mm so the E2K-L26MC1 was the appropriate size. These sensors are a NO operation mode. The premise is that they will turn on/off the pump, based on the level of liquid in the site glass. They are easily attached via small zip tie and can be slid up/down the site glass. They can be attached with a separation of >1 3/8" (>35mm), which is perfect for a liquid level bed.

Wiring
See the attached wiring diagram below. I am not sure about the correct relay since I cannot find a wiring diagram of one.
I will be controlling the pump on/off via the two sensors. The relay will be able to handle 120V output so an SSR is not needed.
If someone could help out with the appropriate relay, that would be great.

Cost
(2) used Omron E2K-L26MC1 = $40
(1) relay/base = $25
wiring/plugs = $6
Total cost = ~$71

Photo at bottom of page is existing setup (before any mod).


Sparky 01-01-2013 09:35 PM

Auto-sparge via liquid level sensor on site glass - Project
 
3 Attachment(s)

Just started this build and hope to get some input on the design, mainly need to make sure I have the right relay (see schematic).

Background
I typically take 45-60min for a 5 gallon batch to sparge and up to 2 hours for bigger batches. Adjusting the input/output of the sparge is tedious - I have better things to do than constantly tweeking the valves during this phase. I wanted to build an auto sparge system with the following requirements:

- Non-penetrating of kettle
- Measurement system that will not be in the mash kettle (cleaning, contamination, clogging)
- Easy adjustments
- Reasonably priced components

Solution
For the reasons mentioned above, I wanted to avoid the Blichman auto-sparge and general float switches.
I noticed on HBT that someone mentioned Omron had a site level sensor, but subsequent messages on HBT yielded no results of someone actually doing a build.

However, I was able to find the liquid level sensor from Omron (picture below):
http://www.ia.omron.com/products/family/475/
I have a Blichman 20gal tank and was able to remove the outer (metal) measurement guide. The site glass is 15mm so the E2K-L26MC1 was the appropriate size. These sensors are a NO operation mode. The premise is that they will turn on/off the pump, based on the level of liquid in the site glass. They are easily attached via small zip tie and can be slid up/down the site glass. They can be attached with a separation of >1 3/8" (>35mm), which is perfect for a liquid level bed.

Wiring
See the attached wiring diagram below. I am not sure about the correct relay since I cannot find a wiring diagram of one.
I will be controlling the pump on/off via the two sensors. The relay will be able to handle 120V output so an SSR is not needed.
If someone could help out with the appropriate relay, that would be great.

Cost
(2) used Omron E2K-L26MC1 = $40
(1) relay/base = $25
wiring/plugs = $6
Total cost = ~$71

Photo at bottom of page is existing setup (before any mod).


Sparky 01-01-2013 11:10 PM

2 Attachment(s)
Quote:
Originally Posted by Gunfighter04 View Post
Are the valves going to be at a pre-positioned level? at the full flow rate of a march pump I'm not sure how you would control cycle time.
They can be adjusted up/down on the sight tube. The gap between the sensors will dictate the cycle time. Here is a mock-up I did on the sight tube with the sensors (NOTE: will use zip ties instead of rubber bands).

I am just waiting for someone to check if I have the correct SPDT relay.

Sparky 01-01-2013 11:10 PM

2 Attachment(s)
Quote:
Originally Posted by Gunfighter04 View Post
Are the valves going to be at a pre-positioned level? at the full flow rate of a march pump I'm not sure how you would control cycle time.
They can be adjusted up/down on the sight tube. The gap between the sensors will dictate the cycle time. Here is a mock-up I did on the sight tube with the sensors (NOTE: will use zip ties instead of rubber bands).

I am just waiting for someone to check if I have the correct SPDT relay.

Sparky 01-03-2013 12:31 AM

1 Attachment(s)
Quote:
Originally Posted by P-J View Post
OR - perhaps I just do not understand the wiring layout of the sensors. I've not been able to find a single circuit diagram for them.
P-J
P-J, thanks for the feedback (sorry about the PM)! I've attached the spec sheet for the sensors below. It is NO operation mode with power on the input to the sensor and power on the output to trigger the SPDT relay. Or, that is the hope!

Sparky 01-04-2013 08:42 PM

1 Attachment(s)

The relay arrived today, so time to tinker.
Sheesh, no wiring diagram for the relay. Damn, something else to figure out (cryptic drawing on side of relay is murky).


jCOSbrew 01-05-2013 03:35 AM

1 Attachment(s)

The relays have standard pinout and form factor. See example tyco relay.
http://www.te.com/commerce/DocumentD...df%7F1393114-1



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