Chinese company Novonsense Microelectronics has introduced a pressure sensor for detecting the liquid level in household appliances, making them more intelligent and saving energy.

Accurate liquid level detection can be important to see if household appliances are functioning correctly. The NSPGD1 is a calibrated gauge-pressure liquid level sensor, which can provide accurate liquid level measurement of household appliances, making them more intelligent.

Traditional liquid level measurement tends to be mechanical and photoelectric, which can only measure the presence or absence of liquid or roughly measure the liquid level, and cannot achieve high precision and stable measurement. However, the built-in signal conditioning chip of the MEMS pressure sensor integrates temperature compensation and linear compensation, which can eliminate the low precision found in traditional liquid level measurement.

The NSPGD1 is a series of calibrated gauge-pressure sensors for the home appliance market. The pressure sensor is available in a range of -10kPa to +10kPa, which can be customised, and comes in a DIP8 package with an air nozzle for easy welding and use. The series supports analogue output and I²C digital output and a frequency output function for more flexible operation.

The pressure sensor is mainly used for accurate measurement of liquid level height. It is an integrated pressure gauge sensor with an air nozzle thatv uses the silicon piezoresistive effect and a MEMS micromachining process.

The package with the air nozzle is suitable for the liquid level detection of household appliances such as washing machines, water purifiers and dishwashers, and can also be used for medical electronic equipment such as massage chairs, intelligent sphygmomanometers, oxygen generator, ventilators, oxygen generators and anaesthesia instrument biosafety cabinets, as well as a pressure switch for negative pressure vacuum detection, gas pressure detection and other industrial control, IoT and other pressure detection applications.