ZPA Barometric Altimeter

The ZPA series Barometric Altimeter is a highly accurate sensor for measuring altitude, which can be used to measure atmospheric pressure and altitude.

The atmospheric pressure is measured by the silicon piezoresistive principle or the vibrating cylinder principle and then converted to the corresponding altitude. It meets the different budgetary conditions and technical requirements of industrial customers.

Monitoring Parameters	Atmospheric pressure/Altitude/Extended GPS output
Monitoring Principle	ZPA-1 Silicon piezoresistive type ZPA-2 Vibrating cylinder type
Power-In	DC12/24V / Solar Power
Interface	RS422/RS485/RS232/

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Technical Parameter

	ZPA-1	ZPA-2
Monitoring Principle	Silicon piezoresistive type	Vibrating cylinder type
Measuring Range	25-1150hPa	103-1450hPa
Measurement accuracy	0.3hPa(25℃)	0.1hPa(FS) 10cm
Resolution	0.01hPa	0.01hPa
Stability / Repeatability	/	<12 ppmFS
Compliance	/	RTCA DO160 environmental testing (vibration, shock, temperature, humidity, altitude and decompression and induced signal sensitivity)
Suitable Scenarios	/	Aerospace
Data Interface	RS485	RS485/422/232
Data Output	Air pressure / altitude / temperature (optional)	Air pressure / altitude / temperature (optional)
Protocol Type	Ascii	Ascii
Operating voltage	5-30V DC	5-30V DC
Operating current	<10mA	<10mA
Ambient conditions	Ambient temperature:-40℃-85℃ Ambient humidity: 0-100%	Ambient temperature:-55℃-85℃ Ambient humidity: 0-100%

Application

Advantage

Barometric Altimeter FAQs

Does the barometric altimeter measure direct height?

No, the barometric altimeter measures the height value after the conversion of atmospheric pressure, which is the difference between the direct distance obtained by ultrasonic distance measurement or radar distance measurement. It can also be understood as indirect distance, mainly used in the field of high altitude, that is, the direct method of measuring instruments inconvenient to install the scene.

Is the height value stable and constant at the same position?

No, because the altitude data is converted, so the altitude will be different under the same altitude because the air pressure will change every day. But you can choose a fixed reference to get a more accurate relative altitude.

What are the main differences between the different principles of altimeters?

The main difference between the oscillometric barometer and the conventional silicon piezoresistive barometer below:

1 Cost
2 Accuracy
3 Outdoor environment adaptability
4 Stability
5 Application scenarios