Eiechip® 10Pcs 18B20 DS18B20 TO-92 3 Pins Wire Digital Thermometer Temperature IC Sensor

These are small, light, and reliable. The interface is simple, direct read, no serial circuit needed.Have had to reset whole microcontroller circuit and sometimes reload program. (On program reload I accept much of that is my fault but I have had working code run for days and the sensor data is skewed from actual. Reset and reload program will fix.Used to sense the temperature of air and central heating pipes for Raspberry Pi application. I used 10 uF bypass capacitor and resistor to minimise noise as described in datasheet. Recommended.

By looking at the serial number of the device, I'm pretty sure this is not a genuine Dallas/Maxim DS18B20, but it tracks what I believe to be a "real" one fine (and for a considerably lower price). I have not tried it in the "one-wire" mode, but it works well with separate power in a 3.3 volt system.

I went through half of them and found that the temperature is off by 3-6F. I make the appropriate correction in each unit they are used in, so not a huge problem, just an annoyance. I did not bother to see check if they are counterfeit.

These work exactly like they're supposed to. I was pleasantly surprised that all of a batch of 20 worked to spec.I purchased two batches of "Eiechip 10Pcs 18B20 DS18B20 TO-92 3 Pins Wire Digital Thermometer Temperature IC Sensor" (total 20) because they are inexpensive enough for experimenting, plus the 1-Wire interface makes it is as easy to hook up one as many.The Maxim Integrated (formerly Dallas) specification is +/- 0.5C; every one of these scored 0.49C or lower over several days testing at room temperature. I imagine results may vary at the limits of device (-10C to +85C aka +14F to 185F), but I think 0.5C at ambient is great for my application, measuring temperatures inside/outside our home.The "excluded" measurement in my results table photo is a different brand of DS18B20 monitoring a computer's temperature.

Order was for a package of 10 quantity of 18B20 temperature sensors. Half of them were actually 2N3906 transistors and of the 5 that were actually labelled 18B20 devices, only 1 of those 5 worked. In fact one of the 18B20's had their leads completely cut-off so could not even test it, and the others had remnants of solder on the leads as if they had been used and removed from something.

NIce temperature sensor and easy to work with.

Easy to use following various web sites found with Google search. Amazing devices only require one wire and ground wire to each device all sharing one single wire to/from Arduino along with common ground.

Bought these after one of the kids left the freezer door open in the garage and we almost lost everything in there. Got some cheap ESP8266 controllers to put temperature probes around to a few places in the house, including that freezer. They are inexpensive and work well.