Provides an easy-to-read display for 2 particle channels. 0.3 micron minimum sensitivity through 20 micron available. Holds 100 samples in data memory and records date, time, counts, and sample volume. Easy data download and printing with included RS-232 interface cable and Windows-compatible software. Operates on a long-life rechargeable internal battery or AC power.

- Lightweight, intuitive handheld for spot checks and contamination control.  - 2 particle channels: 0.3 and 0.5 or 0.5 and 5.0 microns; IAQ and custom sizes available.  - Supports 21 CFR Part 11 compliance with PortAll Version 2.

Monitors six different size ranges simultaneously. Count data displays on the front-panel as total number of particles (cumulative count) or the particles in each size range (differential count). Offers four modes: Manual, Auto, Concentration, and Beep.

- Six particle size channels.  - Cumulative and differential counts from the built-in printer.  - Compatible with PortAll Version 2 software.

Detect discrete particles using a laser-based sensor. Weighs only 1.5 pounds. Internal rechargeable batteries last for 8 hours. The 228 displays the concentration in particles per cubic foot or particles per liter after a six-second sample. The 229 monitors total particle count after a one minute sample.

- One switch, one display, quick results: no complicated controls.  - 228 shows concentration in particles/L or particles/ft3.  - 229 shows total particle count in 0.1 ft 3.

Reliable and easy to operate. The built-in printer allows either immediate or delayed printing of results. Download 400-record buffer using PortAll Version 2. Counts in either cumulative or differential modes. Optional probes available for humidity, temperature and air velocity.

- 28.3 LPM (1 CFM) flow rate.  - Long Life Laser technology.  - Supports 21 CFR Part 11 compliance with PortAll Version 2.

Samples at 28.3 LPM (1 CFM) with 0.3 micron sensitivity (3313) or 0.5 micron sensitivity (3315). Monitors six size channels. Operates from AC power or batteries. Buffer of 2000 records. Built-in printer. Optional environmental sensors available: relative humidity, temperature or air velocity. ISO 14644-1 and Federal Standard 209E calculation modes.

- 28.3 LPM (1 CFM) flow rate.  - Long Life Laser technology.  - Supports 21 CFR Part 11 compliance with PortAll Version 2.