Plantower laser counters may need replacing for various reasons including age, contamination inside the device or simply failing after a long time in service.
Here you can purchase replacement particle detectors. They come in pairs for the PA-II series devices with a plastic component to aid in locating supporting parts.
All Plantower laser counters have been pre-tested in PurpleAir test chambers.
NOTE: Please be sure to select the correct laser counter set for your device:
Each type has different connectors or mounting methods
NOTICE: Lead times on the classic PA-II and PA-II-SD variants may now be as long as six (6) weeks. This is due to lead times on the PMS5003 Laser Counters. We will update this message as this situation changes.
The new pms5003 sensors were easy to fit and have restored readings to 100% correlation and are working well.
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Ronnie H Davis
RHD
Easy. Works like the original.
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WILLIAM BROWN
Replaced laser counter in PurpleAir PA-SD-II
PurpleAir contacted me about a problem with a laser counter unit in one of our PA-SD-II devices (I didn't even realize there was a problem), and shipped replacement counters to us free of charge. Great service, thank you!
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Ryan Demski
Inexpensive and easy install
I purchased replacement laser counters for my PA-II after one channel stopped reporting correctly. The parts arrived quickly. Installation was straightforward by following the linked video and took me about 15 minutes. I appreciate replacement parts are offered and look forward to several more years of reliable use for my sensor.
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Neil Kelley
Replace laser comments
I purchased the replacement lasers in order to have backups for my dual and single sensors. There are no problems with the dual sensor and either of the two single ones but I would like to be prepared in the event that one fails.