The PFM1-T data logger uses a new data logging architecture that allows the user to monitor pressure input in terms of average values based on typical logging rates plus minimum/ maximum values based on fast sampling rates down to 10 samples/second. PFM1-T transient logger can also detect and log pressure surge data up to 1000 readings per second without interfering with the main recordings. During threshold logging, the logger checks the pressure signal against the threshold settings 10 times per second and once triggered starts logging data at one of the configured log rate of 10Hz, 20Hz, 100Hz or 1KHz.