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From: "Charlie England ceengland7@gmail.com" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] thermocouple
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
References: <list-12840431@logan.com>
 <81daa50a-147c-c59b-466e-a580f4d70148@gmail.com>
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On 8/11/2019 9:26 PM, Charlie England wrote:
> On 8/11/2019 8:56 PM, Neil Unger 12348ung@gmail.com wrote:
>> Gents, Nothing to do with flying, but you may be able to assist.  I 
>> have numerous trash pumps that need a thermocouple linked to a 3 
>> Phase cutout.  Yes I can buy a stock unit for over $3000 each which 
>> to me is as hot as the pump can get.  All I need is a switch that 
>> will cut out the pump (power) when it overheats due to dry running.  
>> If it doesn;t the pump then self destructs and $6000 later I am ready 
>> to go again.    I can however get replacement pumps from china for 
>> $500 but without the cutout.
>>
>> So simple heat sensor switch that will go open at preset temp high 
>> setting, say 90 - 100 degrees  C .  Possibly single phase to 
>> disconect 3 phase contactor.  Suggestions??>
>>
>> Neil.
> How about a 'snap switch'?
> https://www.google.com/search?q=snap+switch+thermostat&rlz=1C1CHBF_enUS843US843&oq=snap+switch&aqs=chrome.4.69i57j0l5.7136j0j7&sourceid=chrome&ie=UTF-8 
>
> They're used in everything from furnaces to coffee makers here in the 
> USA.
>
> Charlie
100* C from Amazon:
https://smile.amazon.com/uxcell-Thermostat-Control-Microwave-Normally/dp/B07LBTV8D7/ref=sr_1_1?keywords=100+C+thermostat+snap+switch&qid=1565576930&s=gateway&sr=8-1


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