The Sensidyne(®) pump kit offers fast, simple and precise testing of over 300 gases and vapors. The rugged piston pump requires only one stroke for most applications. The corrosion-resistant Pump features a standard tube tip breaker, stroke counter and flow finish indicator which automatically indicates when a stroke is complete. Gas concentration is precisely recorded on a direct-reading scale printed on each tube. No special tools are required. Tubes sold separately.