TSI Incorporated introduces the Portacount Pro and Pro+ respirator fit testers, which offer fast, simple, easy-to-use, stand-alone operation and are OSHA-compliant for all respirators. These fit testers eliminate the guesswork associated with tedious and error-prone qualitative fit test methods. A true fit test involves measuring mask fit under conditions that approximate actual use. These TSI fit testers measure fit while the user simultaneously performs a series of moving, breathing and talking exercises designed to simulate the same movements made in the field. Both units are quick to set up and easy to operate because they do not require an external computer. The color touchscreen allows the user to control the test with a touch of a finger, pen or stylus.