One unit of Model 1550 has 64 Channels for air velocity. For a larger system, connect up to 5 units in a cascade and add a computer for control. It makes a total of 320 channels.
Flexibility in system configuration means greater freedom, simplicity, and efficient in measurement
4-channel air velocity module Model 1504
2-channel air velocity and temperature module Model 1511
1-channel air velocity, temperature, and humidity module Model 1512
Analog output module Model 1510.