Needed to replace the one in my Shark air cleaner. This had the same part number but the wrong connector.

Fan spins readings were all 0, then suddenly it started working, then 0 again. Got a replacement, and nothing but 0s again.

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

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

I’ve been experimenting with a variety of air quality measurements/sensors for some time, this has been my first foray into Particulate Matter.•Build qualityThe unit is a solid block. Made of formed sheet ali with minimal cutouts for the connector, exhaust and the fan. I kinda like the fact they left the protective blue film on, it’s no worse than a powder coat and can easily be removed if you prefer silver :)It’s not especially light nor heavily, and nothing seems to move or rattle inside.There is no quick facility for cleaning the unit, and with no pre-filter before the fan it is quite conceivable that it will eventually become clogged with larger clumps of dust. It could be argued that this unit is a consumable part, however the datasheet recommends additional protection in certain circumstances.There only provisions made for mounting the unit are four holes for M2 self-tapping screws.•InterfaceThe connector is slightly recessed into the box. It is a type unlikely to be available in a hobbyists collection, but a terminated (on both ends) length of alternating red/black ribbon cable is supplied, giving you one long or two short adapters to Mini-PV or another popular connector type. (Just beware, depending on the end you use, Vcc may be black and GND may be red. Mark your connectors.)Power is 5V and GND. Did not test for reverse-protection.Communication is over 3V3 UART by Tx only or bidirectional, baud 9600.•OperationFor continuous operation you only need the sensor Tx wire to get data out. To preserve the longevity of the laser diode ESPHome recommends connecting sensor Rx too to put the sensor into sleep mode between measurements.•Integration with ESPHomeOnce UART (with optional mcu Tx) is setup, just use the PMSX003 platform. This exposes PM1, PM2.5 and PM10 sensors to Home Assistant.If you’ve got sensor Rx connected to mcu Tx and setup under UART, then you can add an update_interval under the sensor platform config. This will switch off the laser diode and fan in between taking readings, thereby extending their lifetime.•Quality of the dataIndoors with no particular activities occurring, readings are pegged at zero. Maybe this is true and I live in an ultra clean house, I don’t understand PM measures and levels enough to comment other than to say it’s mostly reading zero.Activities such as cooking, incense-burning, aerosols and to some extent using steaming hot water, cause a definite spike in readings, with a sharp rise and an exponential-like decay back to zero. Readings in the 10s of µg/m^3 are common for such activities, with readings in the 100s being particularly noticeable to human senses.Given the resolution of this sensor is only 1 µg/m^3, and normal levels are so low, you don’t get a whole lot of resolution. Maybe this could be good next to a busy road/in a workshop/other polluted area (will try this and update review with my findings), but I feel it’s largely unnecessary at home.•Comparing data to TVOCs and eCO2For testing I have this sensor running next to an ENS160, and there are definite correlations between the data in most circumstances, but they’re obviously not interchangeable. TVOCs and eCO2 values are never at zero and often read relatively highly even though there are no Particulate Matter detected.•ConclusionNot knowing enough about Air Quality and Particulate Measurements I really can’t say if this is a good sensor. But as a hobbyist, if you’re interested in seeing this data, this is a good value and easy to use option.

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.

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).

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.

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.

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.

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.

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.