Where to buy temperature sensors?

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PolarLight
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Post by PolarLight » Mon. Jun. 03, 2019 10:14 pm

Anybody knows where I may buy dozen of different thermocouples for measuring temperatures. I need to measure both water and exhaust gases temperatures, well I may calibrate it myself after wiring to a datalogger.
Water temperature thermocouples should have a range 0-120 C, exhaust thermocouples up to 500 Сelsius.
Better if these thermocouples have threads for easy replacement, and their nets nights me soldered into copper tubes.

 
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McGiever
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Post by McGiever » Tue. Jun. 04, 2019 6:27 am

Amazon has them...

 
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titleist1
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Post by titleist1 » Tue. Jun. 04, 2019 7:00 am

Some other sites that have a variety of sensors.

www.omega.com

www.minco.com

www.alliedelec.com

Can your controller take an RTD input rather than a thermocouple?

 
PolarLight
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Stoker Coal Boiler: JB
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Post by PolarLight » Tue. Jun. 04, 2019 12:55 pm

Got it. Thanks guys.
What advantage does RTD have over thermocouples?, never worked with RTD before.

Visit DS Stoves

 
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titleist1
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Joined: Wed. Nov. 14, 2007 4:06 pm
Location: Cecil County, MD
Hot Air Coal Stoker Stove: Harman Mag Stoker - one in basement, one in workshop
Hand Fed Coal Stove: Harman Mark III on standby for long power outages
Coal Size/Type: Rice/Anthracite; Nut/Anthracite

Post by titleist1 » Tue. Jun. 04, 2019 1:19 pm

There is not a huge difference or advantage between them. TCs use TC leadwire, RTDs use regular copper leadwire. For a coal boiler application the accuracy of either will work fine, although TCs are more accurate for a narrower temp range. RTDs have a wider temp range than TCs and tend to be more stable and repeatable over long periods of time. TCs are cheaper than RTDs, how much cheaper depends on which type you get.

 
PolarLight
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Posts: 237
Joined: Fri. Apr. 06, 2018 5:07 pm
Stoker Coal Boiler: JB
Coal Size/Type: Nut
Other Heating: Propane, firewood

Post by PolarLight » Tue. Jun. 04, 2019 2:06 pm

Thanks Titleist1.

 
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McGiever
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Joined: Sun. May. 02, 2010 11:26 pm
Location: Junction of PA-OH-WV
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Hand Fed Coal Boiler: BUCKET A DAY water heater
Hand Fed Coal Stove: Warm Morning 414A
Coal Size/Type: RICE,PEA,NUT,STOVE /ANTHRACITE and EGG / BIT
Other Heating: Ground Source Heat Pump and some Solar

Post by McGiever » Tue. Oct. 15, 2019 9:33 am

Top brand TCs and RTDs can be found all over at a big discount in ebay, new old stock.

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