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Interface: SPI
Test Temperature Range: 0Degrees Celsius ¨C 1024Degrees Celsius, the converter temperature resolution is 0.25Degrees Celsius
Operating Voltage Range: 3.0 ¨C 5.5V
Operating Current: 50mA
Operating Temperature Range: ¨C20Degrees Celsius ¨C 85Degrees Celsius
Module Size: 15mm * 28mm, with a 3mm diameter screw holes
K type thermocouple junction location, use 301 ordinary terminals
Application: Industrial, Appliances, HVAC
Package Included:
1 * MAX6675 Module
1 * K Type Thermocouple Thermocouple Sensor
1 * DuPont Line
Ankush Girotra
Reviewed in the United States on February 11, 2025
Ordered 2 boards, both DOA.
andrumar10
Reviewed in the United States on February 1, 2025
The first one that was shipped had an open circuit fault. This was evident when I wired it up with an Arduino and the output consistently read 0 degrees C. I tested with a few boards, in different configurations, and ultimately asked for a return. The second one worked perfectly! Adafruit's libraries worked great with it, Plenty of webpages can walk you through the steps needed to hook it up. The only thing you'll need besides this and an Arduino are some Arduino compatible wires, the blocky-ended ones in my picture were easy to work with and worked perfectly.Oh, and make sure you use enough pressure to mate the headers, take a close look at the photo where the wires join the MAX6675 board to see what i'm talking about!
Customer
Reviewed in the United States on September 23, 2023
The MAX6675 works as advertised and is easily connected to an Arduino Uno R3 using the instructions supplied. The supplied thermocouple has a small enough thermal diffusivity that one must wait a bit in order to get a stable reading. I have used the supplied thermocouple to compare readings with an older K-type thermocouple using two of these boards. The readings were essentially identical. So while I do not have a way of checking absolute accuracy, I do see good repeatability. At room temperature the reading from the board is within 1 degree of an independent thermometer.The supplied thermocouple is not intended for high temperature operation, but does seem to operate up to at least 600 F. When doing so, the insulation in the lead cable smokes, but the reading is still good. I have been using this board with and Arduino and a different (high temperature capable and faster responding) K-type thermocouple to control a kiln up to 1500 F with good performance.
Customer
Reviewed in the United States on November 19, 2023
The thermocouple controller (amplifier, error correction, ADC... MAX6675) works as intended. The thermocouple also seems to measure correctly but the response is very slow. After dipping the measure/hot end into boiling water, it took 30 seconds or longer to reach within a few degrees C of 100.I'm not sure if the measure junction is insulated well from the casing, if there's just a lot of thermal mass there, or if it's something else that causes the slow response time. Some other K-type thermocouples I ordered seem to be about just as accurate and respond to changes in less than a second. However, the junction at the measure end is exposed.
S. Mayo
Reviewed in the United States on January 8, 2023
I use these to control a fan on a heat exchanger; it monitors the temperature of the air coming out and (via an arduino), throttles or turns off the fan when the air gets cool. I can't really comment on accuracy because my needs are not fussy, but it works. Connection to an arduino is simple enough and measurements are easy to take.
Solo Pilot
Reviewed in the United States on February 19, 2022
Decent accuracy: Ice water measures 40F, Boiling water measures 190F, higher temps correlate well with multimeter thermocouple. I'd say +/- 10F.Slow response time: The K junction sensor is a rugged solid and takes minutes to reach equilibrium temp. The Time Constant seems to be between 300 to 400 secs, depending on the temperature.Excellent price. Biggest complaint is that product should include a couple of M6 nuts. I had to make a trip to Home Depot.
Coater
Reviewed in the United States on April 18, 2021
4/20/21 Update:I received another device to replace this one and it worked great with no issues. One comparison of both boards I found a small solder ball that was shorting two leads of the IC. I removed the solder ball and this device now works also. With this I changed my review from one star to 5 stars as I should have noticed this problem. I am very happy with this device working well with a D1 mini and Tasmota.Old review:This board did not work. I have another board (different manufacture) working that confirms set up and program.Getting a replacement and will modify review if good.
Phil D'Amore
Reviewed in the United States on September 2, 2019
I ordered two of these. The boards both work as advertised. I checked the boards with a different thermocouple on the tip of my soldering iron. The tip measured around 280C, and I cross-referenced this with a different instrument which also read around 280C.The included thermocouple failed my soldering iron tip test. After over a minute the temperature only got to 180C. I then realized that I was comparing with tiny "bead"-style sensorss and this was not fair. I fired up my hot air gun, and placed the whole body of the sensor in the airflow. This time the temperature reading was as expected, and while it was still a slightly slower response than the bead thermocouple, this is to be expected and it's a perfectly serviceable sensor.I would say with this sensor, just beware that you need to completely soak it in the environment you are sensing. Just placing the tip on a surface you want to measure will give bad results.
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