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jonlaury
Joined: 06 Nov 2006
Posts: 336
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 Posted: Thu Nov 16, 2006 12:48 pm Post subject: GEMS Optical switch |
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I did just about everything wrong in acquiring this gizmo except the price. But it may be a pig in a poke. It's 5VDC, wet probe current sink (normally closed when wet) and metric thread. I want to use it as a low fuel indicator, switching a LED on when low fuel, but the switch opens when the probe is dry...and it's 5V. I can deal with the metric thread.
Is there a way to rearrange it all electrically, so that it does what I want? Or should I just toss it?
John
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mark.steitle(at)austin.ut
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| Posted: Thu Nov 16, 2006 12:56 pm Post subject: GEMS Optical switch |
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John,
Which model GEMS unit did you buy? I’m using the ELS-1100 sensor in my tanks as you’ve described and they work perfectly.
Mark S.
From: owner-aeroelectric-list-server(at)matronics.com [mailto:owner-aeroelectric-list-server(at)matronics.com] On Behalf Of John Burnaby
Sent: Thursday, November 16, 2006 2:45 PM
To: aeroelectric-list(at)matronics.com
Subject: GEMS Optical switch
I did just about everything wrong in acquiring this gizmo except the price. But it may be a pig in a poke. It's 5VDC, wet probe current sink (normally closed when wet) and metric thread. I want to use it as a low fuel indicator, switching a LED on when low fuel, but the switch opens when the probe is dry...and it's 5V. I can deal with the metric thread.
Is there a way to rearrange it all electrically, so that it does what I want? Or should I just toss it?
John
| Quote: | | www.aeroelectric.com |
0123456789012345
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retasker(at)optonline.net
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| Posted: Thu Nov 16, 2006 4:09 pm Post subject: GEMS Optical switch |
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If you can give us the model that you purchased, we can tell you how to
use it. I have a couple of 5V versions because they were cheap (on
Ebay) and plan to use them myself. It is not that difficult to do, but
we need to know exactly what you have.
Dick Tasker
Do not archive
John Burnaby wrote:
| Quote: | I did just about everything wrong in acquiring this gizmo except the
price. But it may be a pig in a poke. It's 5VDC, wet probe current
sink (normally closed when wet) and metric thread. I want to use it as
a low fuel indicator, switching a LED on when low fuel, but the switch
opens when the probe is dry...and it's 5V. I can deal with the metric
thread.
Is there a way to rearrange it all electrically, so that it does what
I want? Or should I just toss it?
John
*
*
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jonlaury
Joined: 06 Nov 2006
Posts: 336
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| Posted: Fri Nov 17, 2006 8:17 am Post subject: GEMS Optical switch |
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GEMS Optical Liquid Level Sensor number ELS-900. This sensor uses light (infra-red) to determine if liquid is in contact with the tapered section of the sensor. It is a very high temp sensor (for use from -40 up to 125 deg C), is very small and is completely solid state (no moving parts for highest reliability). The housing is made of Polyethersulfone which is very resistant to most chemicals. The included o-ring is Viton and the threads are M12 x 1-8. The pressure range is 0 to 250 psi. It runs on 5 Vdc and consumes 4 mA. It has been shock, EMI and vibration tested to MIL specifications and it meets specific CE and UL requirements. It is a probe wet = current sink type. The wires are approximately 6” long and the sensor’s length is 32 mm. It comes in an EMI shielded bag.
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