Replacement Laser Counters
Replacement Laser Counters
Replacement Laser Counters
Replacement Laser Counters

Replacement Laser Counters

Regular price
Sale price

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
    • The images can help identify what you have.
  • For information and instructions on replacing your laser counters, please see the videos linked in the following Community Post:
Quantity must be 1 or more
Shipping calculated at checkout.

  • User replaceable dual Laser Particle Counters (PMS-6003)
Laser Particle Counters

Class 1 Laser. A Class 1 laser is safe under all conditions of normal use.

Manufacturer Plantower

This device contains two particle detectors to provide redundancy and help determine sensor health.

Type PMS-6003 (2)
Range of measurement 0.3, 0.5, 1.0, 2.5, 5.0, & 10 μm
Counting efficiency 50% at 0.3μm & 98% at ≥0.5μm
Effective range
(PM2.5 standard)*
0 to 500 μg/m³
Maximum range (PM2.5 standard)* ≥1000 μg/m³
Maximum consistency error (PM2.5 standard) ±10% at 100 to 500μg/m³ & ±10μg/m³ at 0 to 100μg/m³
Standard Volume 0.1 liter
Single response time ≤1 second
Total response time ≤10 seconds

Customer Reviews

Based on 54 reviews
William Lemei

They work 100% but are a fiddly install.

Pietro Ricciardi
simple and well-guided operation

I have installed 5 PurpleAir sensor stations in the municipality of Pignataro Maggiore (Italy) and over the years, I have had to replace 4 pairs of sensors, following the provided video guide. The operation is simple and very well-guided!

Sensor Replacement

Simple to update and back to 100% sensor agreement.

Dirt Lizzard
Replacement Laser Counters

Replacements work and install was not a big deal with the video. Customer service from Purple Air was great.

Jeri Thompson
Replacement Laser Counters

Installing the replacement laser counters solved the problem!