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Description
Thermocouple Amplifier MAX31850K with 1-Wire OutputThermocouples are very sensitive, requiring a good amplifier with a cold compensation reference. So far we've carried the very nice MAX31855 which is an SPI interface thermocouple amplifier. The '855 is great but if you have a lot of thermocouples to measure it isn't terribly easy to use. That's why we are also carrying the new '850 model from Maxim it's a "1 Wire" thermocouple amp which can have any number of breakouts on a single shared I O line.
Thermocouples are very sensitive, requiring a good amplifier with a cold-compensation reference. So far we've carried the very nice MAX31855 which is an SPI interface thermocouple amplifier. The '855 is great but if you have a lot of thermocouples to measure it isn't terribly easy to use. That's why we are also carrying the new '850 model from Maxim - it's a "1-Wire" thermocouple amp which can have any number of breakouts on a single shared I/O line.
The MAX31850K does everything for you, and can be easily interfaced with any microcontroller that has 1-Wire support. This breakout board has the chip itself, a 3.3V regulator with 10uF bypass capacitors all assembled and tested. This board can be used with 'parasitic power' - where the power is on the data line - or with 'local power' where the power for the converter comes in on the Vin Pin.
Please note: this board does not have level shifting on the 3V Data line - we did this on purpose so that it can be used in parasitic mode. The data line must be level shifted to 3V - our 4-channel shifter works wonderfully for level shifting 1-Wire and you only need one at the '1-Wire host' for all thermocouples on the shared data line.
The MAX31850K data format is very similar to that of the well known 1-Wire DS18B20 temp sensor but it is not drop in compatible without code changes to check for the new '1 Wire family' type. We have adapted the classic Arduino OneWire and DallasTemp libraries to be MAX31850 compatible, so please click on those links to grab our libraries.
Comes with a 2 pin terminal block (for connecting to the thermocouple), 4.7K data line pullup resistor, and pin header (to plug into any breadboard or perfboard). Goes great with our 1m K-type thermocouple. Not for use with any other kind of thermocouple, K type only!
- Works with any K type thermocouple
- Will not work with any other kind of thermocouple other than K type
- -270°C to +1370°C output in 0.25 degree increments
- Internal temperature reading
- 3.3 to 5v power supply. Data line is 3V only
- 1-Wire interface allows any number of thermocouple amps on a single data line
- Dimensions (without headers):20mm x 20mm
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4.8 ★★★★★
Based on 12 reviews
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Product Reviews
★★★★★ 4
Great Versatile Mat🧡
Color: Gray, Size: 18"x24", Color: Gray, Size: 18"x24"
The cooling side works well with the hot temps and the warming side is great for those chilly nights which is great. It's easy to clean and my cats took to it right away. The fabric is soft and the cooling side is cool to the touch, my cats love it. Exactly as described🧡
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Reviewed in the United States on April 27, 2026
★★★★★ 5
Cooling dog bed
Color: Gray, Size: 24"x36"
Good size for a medium dog. It is thin but soft Cooling aspect works. Our cat likes it as well.
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Reviewed in the United States on May 29, 2026
★★★★★ 5
Great for outdoor cats in the summer
Color: Gray, Size: 18"x24"
I bought this for my outdoor cats specifically for the summer since it’s get really hot. I always see them relaxing on this and they seem to love it. It’s easy to wash and is quite soft. It’s also quite thick and of good quality.
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Reviewed in the United States on May 18, 2026
★★★★★ 5
Nice bed
Color: Blue, Size: Large (Pack of 1)
Good quality dog bed. My pittie loves to burrow himself under blankets so I figured we would give this a try. He hasn’t figured it out yet but it’s his new favorite spot to take a nap when he’s not on our lap. Love the color and seems to be nicely made. I do wish it came in a bigger size but it’s still big enough for him.
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Reviewed in the United States on February 22, 2026
★★★★★ 5
Nice quality bed
Color: Blue, Size: Large (Pack of 1)
Nice quality. My dog loves laying on this bed but hasn’t yet figured out getting inside. I cover him after he lays and he seems to enjoy it
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Reviewed in the United States on December 28, 2025
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