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Old 11-02-2015, 06:30 PM   #1
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Your Gas Sensor has a Limited Life

At 2 AM this weekend at a tail-gating camp-out the temperature was plummeting towards 32. The CO/LP gas alarm came on and would not let the heaters come on or the fridge to run on propane. The sensor controls a valve on the propane tank. When the propane heaters come on, there is some propane leakage until the gas is lit. I had to jumper it out or freeze.

Upon taking the sensor out in my hand, it had a date stamped on the rear and on the front it said replace by June 2015. Upon looking up to buy a new one, I find it has a 5-year life.

MTI Industries, Inc.

Hank
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Old 11-02-2015, 06:38 PM   #2
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That price $284.00 is outrageous, omg!
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Old 11-02-2015, 06:51 PM   #3
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That price $284.00 is outrageous, omg!

X2
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Old 11-02-2015, 07:38 PM   #4
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http://www.amazon.com/Safe-T-Alert-7.../dp/B00F6EWC8I
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Old 11-02-2015, 07:50 PM   #5
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That price $284.00 is outrageous, omg!
That is the MSRP from the manufacturer; you can get for under $100 elsewhere. I hope that you did not pay MSRP for your motorhome.
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Old 11-02-2015, 08:23 PM   #6
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Same goes for smoke detectors
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Old 11-02-2015, 08:41 PM   #7
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One or two of these - depending on the size of your RV - is really cheap insurance for waking up in the morning.

http://www.amazon.com/Kidde-KN-COPP-...dp_ob_title_hi
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Old 11-02-2015, 08:46 PM   #8
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One or two of these - depending on the size of your RV - is really cheap insurance for waking up in the morning.

http://www.amazon.com/Kidde-KN-COPP-...dp_ob_title_hi

Those are excellent and I have added one to my Moho. They unfortunately are not the same. The one that failed is wired into the LP tank to shut the LP off if Aleah us detected. Two completely different items that do the same thing.
I have seen some that folks added but put in the ceiling like a smoke detector. They need to be close to the floor as LP is heavier than air.



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Old 11-02-2015, 09:24 PM   #9
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Upon taking the sensor out in my hand, it had a date stamped on the rear and on the front it said replace by June 2015. Upon looking up to buy a new one, I find it has a 5-year life.

MTI Industries, Inc.

Hank
There is a temporary fix for an out of date detector. In the manual it says
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Old 11-02-2015, 09:33 PM   #10
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Nice Silver. I love anyone that reads the manual. I should try that some day.



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Old 11-02-2015, 09:41 PM   #11
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Nice Silver. I love anyone that reads the manual. I should try that some day.
just do not think to badly of me. Let's keep it our secret.
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Old 11-02-2015, 10:15 PM   #12
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Nice Silver. I love anyone that reads the manual. I should try that some day.
Indeed!
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Old 11-03-2015, 01:46 PM   #13
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I don't work here but in looking for a new unit myself in the spring here goes.

MTI Industries 40-441-P-WT Safe-T-Alert 12 Volt LP Gas Detector Alarm Surface Mount | 22950 | Hanna Trailer Supply Oak Creek, Wisconsin
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Old 11-03-2015, 02:05 PM   #14
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At 2 AM this weekend at a tail-gating camp-out the temperature was plummeting towards 32. The CO/LP gas alarm came on and would not let the heaters come on or the fridge to run on propane. The sensor controls a valve on the propane tank. When the propane heaters come on, there is some propane leakage until the gas is lit. I had to jumper it out or freeze.

Upon taking the sensor out in my hand, it had a date stamped on the rear and on the front it said replace by June 2015. Upon looking up to buy a new one, I find it has a 5-year life.

MTI Industries, Inc.

Hank

They always go off at 2 am!

I'd get one that is not hooked up to the gas tank. I know it sounds good in theory but you bypassed the sensor anyways(defeating the purpose). I have the regular kind that costs around $85. Been doing fine for me.
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Old 11-03-2015, 07:30 PM   #15
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My detector used to always go off between 2am and 4am when it was cold. This started the second year of ownership of a new Georgetown but wasn't caused by an expired detector. The detector will go into alarm state if the house battery voltage drops too low! The load of the furnace motor, combined with cold temperatures and an outside location for the house batteries combined to drop the battery voltage low enough to cause this problem.

I have two solutions:
1. Stay overnight where I have shore power when I expect the furnace to be in use.
2. Add a third deep cycle battery to the circuit. This is easy to do because I added a heavy duty DC power line from the house batteries to the interior of the coach. The extra battery is part of other equipment I normally carry with me.

The third battery makes all the difference. I never run into low voltage issues at night now.

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Old 11-03-2015, 08:14 PM   #16
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As the OP for this thread, my purpose was to alert everyone that the gas sensor has a limited useful life.


Since this is the Berkshire section of the FR Forum, I would think that most (including myself) would replace the sensor (which is both CO & LP) with one the same as originally provided, which is MTI model 70-742-R. When used in a Berkshire, it controls a safety valve mounted on the propane tank.

Of course, if there is something better out there with the same functionality, one might consider it.

Hank
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Old 11-18-2015, 05:17 PM   #17
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My detector just started beeping today and it won't reset and it is just 2 years old. It is beeping continuously not just every 25 seconds. Does any one know what the warranty on this detector is? Their website is useless and doesn't give any warranty information.
Thanks.
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Old 11-18-2015, 07:17 PM   #18
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Caution - Do not do the stupid mistake that I did. I ordered the Safe-T-Alert 70-742-BR, which does not have the required relay.

My original part was 70-742-R-Kit-BL (BL for black). The kit gives you the relay and the LP gas valve (which I don't need).

The replacement part that you need is 70-742-R-(*)
Where (*) is BL, BR or WH
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Old 11-19-2015, 11:29 AM   #19
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OK- Well, I called the manufacturer to see what the warranty is and, of course, it is 1 year. When speaking with the woman there, she said to unplug the sensor so it resets and erases the memory. Well, of course, it is hard wired. I shut off the batteries (coach and chassis), turned off the salesman switch, unplugged from the AC, turned off the inverter and the sensor is still showing green and that it has power. Checked for a fuse in the under driver fuse compartment and no fuse labeled for the gas/CO sensor. Does anyone know if there is a fuse for the sensor and where it would be located or how I can turn off the power to it?
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Old 11-19-2015, 12:23 PM   #20
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OK- Well, I called the manufacturer to see what the warranty is and, of course, it is 1 year. When speaking with the woman there, she said to unplug the sensor so it resets and erases the memory. Well, of course, it is hard wired. I shut off the batteries (coach and chassis), turned off the salesman switch, unplugged from the AC, turned off the inverter and the sensor is still showing green and that it has power. Checked for a fuse in the under driver fuse compartment and no fuse labeled for the gas/CO sensor. Does anyone know if there is a fuse for the sensor and where it would be located or how I can turn off the power to it?
I believe that typically the sensor is in-line fused directly off the battery.
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