Fast-Response Thermistor Probes for Temperature Microstructure Studies at Sea

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Abstract
Thermistor probes were built capable of resolving 0.01°C temperature differences in times as short as 0.02 sec, as shown by direct measurement. An approximately linear relation of output signal to temperature, and insensitivity to variations in water velocity require careful choices of circuit resistances and operating power dissipation. Preliminary tests at sea illustrated the importance of eliminating the velocity effect, but also showed that small thermal microstructures could be detected with the new probes.

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