THERMISTOR BASE SIGNALING DEVICE FOR DETECTING LIQUID LEVEL Russian patent published in 2003 - IPC

FIELD: measuring liquid level in industrial and domestic reservoirs, possibly used as primary measuring transducer in automatic systems for monitoring and controlling. SUBSTANCE: apparatus includes housing, printed circuit board with measuring unit, DC power source arranged on printed circuit board, thermistor and indicator. Thermistor is electrically connected with DC source and with measuring unit. Thermistor is arranged outside housing; remaining members of device are arranged in housing and they are connected one with another and with housing. EFFECT: enhanced authenticity of quickly received measurement results, enlarged working temperature range of signaling device, improved reliability even in condition when device is subjected to action of moisture and vibration. 3 cl, 1 dwg