SKC Airchek 52
Ideal for "on worker", short-term or full shift sampling, the AirChek 52 personal sampling pump can be used for STEL, TWA or Ceiling sampling using single sorbent tubes. This unit is the workhorse of air sampling pumps for industrial hygiene studies or environmental testing. This battery-operated pump weighs only 20 ounces, and its modular pneumatic system provides constant flow in a range of 750 to 300 ml/min, reducible to 5 to 500 ml/min with the constant pressure controller. Flow is compensated with up to 25 inches water backpressure and moderated with a built-in pulsation dampener. As backpressure increases, the motor voltage corrects automatically for constant flow, so there is no sacrifice in accuracy, even in dusty environments. If flow is restricted for more than 15 seconds, the pump shuts down automatically, but the timer retains the valid run time.