Abstract: A mount or submersible or semisubmersible housing for supporting a submersible analyzer or device and method for analyzing fluid. The mount includes an elongated submersible housing that supports the analyzer or device. The housing is ruggedized and has a geometric body with an internal cavity and with upper and lower ends. The upper end is configured to mount to a fixed structure. In some embodiments a slot extends between the upper and lower ends of the housing along a longitudinal axis thereof. In some such embodiments the slot is sized to receive a portion of a sliding extension that supports a sensor of the analyzer or device, thereby facilitating the installation and removal of the analyzer or device with respect to the elongated submersible housing. An attachment may be used to fixedly mount the elongated submersible housing to the fixed structure.

Abstract: Discretionary data encoded on a track of a magnetic strip card is used to improve the reliability of recovery of the card data and, when coupled with complementary processing in the EFT terminal, protects the PIN on an end to end basis (that is between the transaction terminal and the card issuer), as well as providing for end to end card authentication. An issuing bank encodes cards under the control of a number of encryption and encoding keys which are unique to the Issuer Identification Number (IIN). The result of this is an individual encryption key (Card Key CK) for each card which is derived from this key. The encoded Card Key (CK) which is stored in an encoded form within the track discretionary data is used as the basis of a key to firs encrypt the PIN. The Card Key is combined with transaction variables such as amount of the transaction to produce a unique PIN key for this transaction. The Card Key is not transmitted by the terminal to the controlling computer system.