Abstract: Tamper-proof gateways are described. A gateway comprises a date intake module, a data transmission module, a tamper switch and a controller. The data intake module couples to one or more data generation devices. The data transmission module is configured to transmit sense information generated by the one or more data generation devices to a network. The tamper switch is configured to generate an alert signal in response to sensing tampering of the tamper-proof gateway. The controller is configured to: 1) place the tamper-proof gateway in a secure state in response to receiving the alert signal from the tamper switch, and 2) withdraw the tamper-proof gateway from the secure state in response to receiving authentication information. Withdrawing the gateway from the secure state may comprise placing the tamper-proof gateway in a first privileged state or a second privileged state.

Abstract: Methods and systems for determining characteristics of fluids are described. A method involves illuminating a portion of a fluid by emitting light having an emission spectrum spanning at least from an infrared band to an ultraviolet band, and producing an output signal by receiving the light upon being scattered by the fluid using an optical detector. A controller may select a target sub-band of the emission spectrum based on information associated with the fluid, and may further determine a characteristic of the fluid using at least a portion of the output signal associated with the target sub-band of the emission spectrum. Alternatively, or additionally, a controller may apply an operator to the output signal, and may further determine the characteristic of the first fluid by applying a machine learning model to a result of the operator as applied to the first output signal.