A cap for a fluid sensor is provided. The cap comprises a cap input port including a first toolless connector configured to removably couple to a cable; and a cap output port including a second toolless connector configured to removably couple to a cable. The cap may further comprise an interface circuit including a circuit input port, a circuit output port, and a sensor port configured to couple to the fluid sensor. The first toolless connector may be configured to removably couple the circuit input port to a cable and the second toolless connector may be configured to removably couple the circuit output port to a cable. The circuit will automatically sequence the signals on the cable, so standard one-to-one wired cables can be used.