DEVMO 2PCS Digital Particle Concentration Laser Sensor PMS5003 PM2.5 PM10+Cable Compatible with Ar-duino

I connected this (5V, GND, Rx, Tx) to an ESP32-S2 mini running Tasmota. It immediately recognized the device, and displayed the particulate counts. Using gnuplot, I can get nice graphs of the levels over time. If you're using Tasmota on an ESP32, remember to use the sensor18 command to set the sample time (e.g., 'sensor18 120' for a sample every 2 minutes). This dramatically extends the life of the device, which would otherwise be limited to 30,000 hours (~3.5 years).

I had one of my Purple Air PA-II sensors go bad -- I couldn't really decide which one it was, just that the two sensors in it had diverged from one another. Cleaning the sensors didn't help, so I decided to replace both. I liked that these sensors came as a pair, as I hoped that they were very close to each other in time of manufacture, and would work very similarly to each other. Looking at serial numbers, the devices delivered to me were made on the same day (2022/04/09), and were 270 units apart in production order. I disassembled my PA-II (which was an older unit not designed for user replacement) with no difficulty, removed the old sensors, and installed the two new ones. After reassembly, the PA-II powered up with no issues. I did notice at first that the new sensors were reading farther apart than I expected, but over the course of the next few days, the difference closed. Now, they read right on top of one another, just differing in random noise. My statistics are showing an average of 0.3 ug/dl difference between the two sensors over time. I certainly have no scientific way to calibrate them, but both devices are reading in-line with other AQ sensors in my area.

Standard PMS particle sensor. Came well packed in bubble wrap and connector cables. Both units worked immediately out of the box. Decent enough price.

Nice unit and has been working solidly. Reacts quickly and accurately to environment changes. I'd love to give it 5 stars except for a manufacturer issue. This choice is made by Plantower not DevMo, all the pms5003 appear to have the annoyance which is... The connector is small (ph or gh?) and recessed, requiring one to push the connector in with a fingernail or tool. The wires are very light gauge. All together it's terribly easy to damage this wiring harness. There is no retaining clip on connector which is a bad choice for anything with moving parts. While the unit's vibration is virtually undetectable, that connector is still bound to work loose. It fell out often during prototyping. And, while most of us are used to ignoring color code, the wiring harness is alternating black/red ribbon and the connectors pin orientation was difficult to determine. Out of the box VIN is a black wire and GND is a red wire which cast a lot of doubt during the initial hookup. A better connector, some respect for wire colors would be really nice. There is a very inexpensive breakout board for these that will save you some headache (I still hate the tiny recessed unretained connector). I'm very happy with the unit except for the connector and wiring.

Very nice sensor. Very sensitive to air quality; I can detect the furnace blower turning on, something frying in the kitchen, and definitely incense burning from across the house. Also super easy to integrate with microcontrollers; I have mine on an ESP8266 sending the particle counts to a website via WiFi. Very happy with this. The design is also good; and there is an internal fan consistently pulling the air samples through the laser; I feel this make for much more consistent data that some other passive particle monitors.

Have bought a few of these to monitor conditions and have been excellent

This has the same sensor chip, but I wasn't sure it would work but it does. Happy to have it cheaper, faster, and fewer dinosaurs burned shipping it to me.

While this comes with a cable (thank you) it does not come with a header board for the cable to plug into. Compare this to the same product over at Adafruit where it does come with a header board. My inelegant solution to this (given the very small connector) was to cut the cable in half and then crimp male breadboard connectors on. It is now connected to an ESP32 board running ESPHome and reporting data for the house. So -1 star for the lack of header board. Given how long it took me to crimp those male connectors together, I'd be happy to pay a bit more for the board.

Delivered on time in good condition. User experience: A+.

I bought a pair of these and wired them up to two identical Arduinos. The plan was to use one inside the house, the other outside. Sitting side by side, they give COMPLETELY different readings, with one device showing numbers 10 to 15 times higher than the other. And it's not the Arduinos .. swapping the sensors over shows the same thing; the high reading sensor continues to read high. Time to look for some other sensors.

So unless you have converters from tiny pins to standard pin spacing, you will need to either cut the cable or try to find small wires to stuff into the cable and then convert to standard gauge for wiring to your device. A board that converts from the small pin spacing to standard spacing would be great to include. That aside, the unit works fairly well. As seems to be typical for DEVMO, there is no info included on the web page (some companies include data sheets on Amazon - a very handy feature). However, if you look up PMS5003, which is printed on the sticker (amongst other numbers) or look up PLANTOWER, you will find a fair bit of info out there. I just used a PLANTOWER data sheet and some Arduino test code I found online and all went well. One quirky thing to note (and this is another reason to include a converter board) is that while the sensor needs 5V power, the Tx and Rx use 3.3V levels, so you should be using a level shifter if interfacing with 5V level devices such as an arduino. It works just going direct, but may burn out the transceiver in the sensor after a while. I just tested it with some smoke from incense - that worked to drive the levels pretty high. Given that I am using test code, I can't say whether the readings are accurate or not, but they seemed somewhat plausible and if the readings were off it could be the code since I haven't really dug into it yet. So, if they provided a converter board that would be great, I really think that is needed here, hence the 4 star rating instead of 5. Aside from that it works well.

Works okay! The kit comes with 2 sensors and a cable. I don't have a header connector for this so i broke it out into pins to connect to the breadboard. I see that other vendors include a breakout kit for this function to keep the cable intact and that would have been a nice addon. For testing i used an ESP32 in the Arduino IDE with Adafruit's PM25 AQI sensor library. The sensor works off serial and it's a bit confusing finding the pinout on the cable. You will likely want to look for some documentation online for the module it's fairly common but can help figure it out. While i appreciated some of the details on the product page good documentation is always a plus and i wish there was something provided to facilitate. in any case the modules appear to work are sufficient for my usage case and i hope to build a little environmental sensor for my indoor or outdoor use. With increasing smokey days here it's good to have some reliable localized data to know when it's not so safe to be outside.