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Old 09-01-2013, 11:49 AM   #1
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Water Level Sensor - Non Contact - NO/NC

I am looking for a water level sensor that will provide Normal Open or Normal Close connections. I want this to be a non-contact type sensor.

This is similar to the sensors used by Tecma for the toilet 1/2 and full sensors, and other tank gauges have these type sensors.

I am sure there will be a control module of some sort to be the brains, provide the power to the sensor, and read the resistance change.

I prefer it to be 12V, but 120v is ok.

I have been unable to find a workable solution, so I am hoping my IRV2 friends can help.
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Old 09-01-2013, 11:59 AM   #2
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So what does a Non-Contact sensor look like?

Would it be something that does NOT contact the water?

Curious minds want to know.

Dr4Film ----- Richard
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Old 09-01-2013, 12:06 PM   #3
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This is the Tecma sensor that is on the black tank.

It does not touch the water, and does not require cutting a hole.

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Tecma Toilet Sensor Kit, Tecma Silence, Full & Mid Sensors, 36743
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Old 09-01-2013, 12:13 PM   #4
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Ahhh, Got it.

What you might like is the SeeLevel Tank Level System.

It comes with Non-Contact sensors which are attached to the outside of the tanks, fresh, gray and black.

It is the BEST and reliable tank sensor system in the industry.

Water Tank Level Indicators | Seelevel Tank Monitoring System

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Old 09-01-2013, 12:42 PM   #5
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Actually I don't want it for level display but rather for the no/nc function. I am rigging up an auto fill for my fresh water tank.
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Old 09-01-2013, 12:54 PM   #6
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Quote:
Originally Posted by redbaron73 View Post
Actually I don't want it for level display but rather for the no/nc function. I am rigging up an auto fill for my fresh water tank.
Check on Signet electronics website i am sure they will have a capacitance sensor with N/C and N/O contacts

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Old 09-01-2013, 01:15 PM   #7
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Quote:
Originally Posted by redbaron73 View Post

Actually I don't want it for level display but rather for the no/nc function. I am rigging up an auto fill for my fresh water tank.
I just finished the very same project in my coach recently. However, I used a float switch which could be mounted in either direction, NO or NC.

You do have to drill a 7/8 inch hole in the side of the fresh water tank but truthfully, that was the easy part. And frankly it causes no problems or concerns as the sensor is attached to a rubber stopper and a SS fender washer. Plus the water level never really gets up over that area as it shuts off just prior to that level.

Have you read through my post and there are a bunch of photos too?

Custom Fresh Water Auto-Fill System

If you don't want to drill a hole then your choices are going to be very limited.

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