$53.50
  • A-449
  • Usually ships in 4-6 business days

The Dwyer A-449 remote display allows users to field calibrate GSTA and GSTC carbon monoxide and nitrogen dioxide gas transmitters. The mini USB connection plugs directly into the electronics board and allows for span and zero adjustment. When the electrochemical sensor reaches the end of its life, the A-449 display will indicate that the sensor needs to be replaced.