Where to buy temperature sensors?

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PolarLight
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Stoker Coal Boiler: JB
Coal Size/Type: Nut
Other Heating: Propane, firewood

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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Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
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Coal Size/Type: RICE,PEA,NUT,STOVE /ANTHRACITE and EGG / BIT
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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?

Visit DS Stoves

PolarLight
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Posts: 201
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 12:55 pm

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

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titleist1
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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
Location: Cecil County, MD

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: 201
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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