Down hole and above ground data loggers

摘要: The down hole and above ground data loggers according to the present invention can be used with any sensors or probes. switching associated different is accomplished on a circuit board in logger using an external device. send device via hard wire radio frequency. Sending frequency eliminates need for user go out field. Thus, obtain real time historical without having In one embodiment, disclosed that capable of being installed deployed small openings. another disclosed. both embodiments, record analog sensor discrete data. are easy use, reliable, accurate, cost efficient, feature rich.