DAWSON HI-VOL PUMP Chlorine (CL2) It uses a sheath air

It uses a sheath air system that isolates the aerosol in the optics chamber to keep the optics clean for improved reliability and low maintenance

The TSI AEROTRAK™ Handheld Particle Counter Model 9303 offers the most features and flexibility for customers interested in a low cost and versatile handheld particle counter

and sampling 2 inches (5cm) diameter monitoring wells up to 150 to 200 feet  (45 – 60m) deep

a fast/slow response switch

DAWSON HI-VOL PUMP Chlorine (CL2) It uses a sheath airThis high volume air sampler is designed for area monitoring and clearance sampling, and is an economical tool for environmental testing professionals, abatement contractors, industrial hygienists and safety managers. A breathing zone cassette holder sits on a tripod for testing to AHERA standards. The flow regulator adjusts from three to 20 liters per minute.