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A level-monitoring probe with an integrated temperature sensor

| By Chemical Engineering

SignalFire Wireless Telemetry

SignalFire Wireless Telemetry

The Sentinel Float Stick System (photo) serves as a wireless-communication link in the remote monitoring and control of tank levels and temperatures for offsite data processing. Consisting of a magnetostrictive level probe with integrated temperature sensors mated with a Sentinel wireless node, the Sentinel Float Stick System creates a wireless connection between a sensor and a gateway where sensor data, along with node-diagnostic information, is available via a Modbus RTU or TCP interface. Reported values include product level, interface level, temperature and status. Powered by internal lithium batteries or an optional solar package, the system has a½-mile range and operating temperatures of –40 to 60ºC. The Sentinel Float Stick System is designed for Class 1 Division 1 intrinsically safe operation. In addition to monitoring tank levels, the Float Stick System integrates a temperature sensor to measure fluid temperature. — SignalFire Wireless Telemetry, Hudson, Mass.