ZPA Barometric Altimeter
ZPA-1 / ZPA-2
The ZPA is a barometric altimeter available in two variants, ZPA-1 using a silicon piezoresistive element and ZPA-2 using a vibrating cylinder element, both measuring atmospheric pressure and derived altitude. It is supplied in the UK by MetSensor UK.
- ✓ Two sensing options: ZPA-1 silicon piezoresistive, ZPA-2 vibrating cylinder
- ✓ ZPA-1 range 25-1150 hPa, ZPA-2 range 103-1450 hPa
- ✓ ZPA-2 offers 0.1 hPa FS accuracy, equivalent to 10 cm altitude resolution
- ✓ 0.01 hPa resolution on both models
- ✓ RS485 output on ZPA-1; RS485/422/232 on ZPA-2
Specifications
| ZPA-1 principle | Silicon piezoresistive |
|---|---|
| ZPA-1 range | 25-1150 hPa |
| ZPA-1 accuracy | 0.3 hPa @ 25°C |
| ZPA-2 principle | Vibrating cylinder type |
| ZPA-2 range | 103-1450 hPa |
| ZPA-2 accuracy | 0.1 hPa FS; 10 cm altitude |
| ZPA-2 stability | <12 ppmFS |
| Resolution | 0.01 hPa (both models) |
| Operating voltage | 5-30V DC |
| Operating current | <10 mA |
| Ambient temperature | ZPA-1: -40 to 85°C; ZPA-2: -55 to 85°C |
| Ambient humidity | 0-100% |
| Data interface | ZPA-1: RS485; ZPA-2: RS485/422/232 |
| Protocol | ASCII |
| Power input | DC12/24V / solar |
| ZPA-1 Measurement accuracy | 0.3 hPa (25℃) |
| ZPA-1 Resolution | 0.01 hPa |
| ZPA-1 Data Interface | RS485 |
| ZPA-1 Operating voltage/current | 5-30V DC / <10mA |
| ZPA-1 Ambient temperature/humidity | -40℃ to 85℃ / 0-100% |
| ZPA-2 Measurement accuracy | 0.1 hPa (FS), 10 cm |
| ZPA-2 Resolution | 0.01 hPa |
| ZPA-2 Stability/Repeatability | <12 ppmFS |
| ZPA-2 Data Interface | RS485/422/232 |
| ZPA-2 Operating voltage/current | 5-30V DC / <10mA |
| ZPA-2 Ambient temperature/humidity | -55℃ to 85℃ / 0-100% |
| ZPA-2 Compliance | RTCA DO160 environmental testing |
| General Power-In | DC12/24V / Solar Power |
| Monitoring Parameters | Atmospheric pressure/Altitude/Extended GPS output |
| Protocol Type | ASCII |
Applications
- Small flying machines
- Vehicle-mounted autonomous positioning systems
- Geological exploration
- Avionics experiments
- Dynamic measurement
- Military vehicle trajectory tracking
- Inertial guidance navigation systems
- BeiDou passive positioning
Frequently asked questions
What is the difference between ZPA-1 and ZPA-2?+
ZPA-1 uses a silicon piezoresistive sensing element with a range of 25-1150 hPa and ±0.3 hPa accuracy. ZPA-2 uses a vibrating cylinder element with a wider range of 103-1450 hPa and tighter accuracy of 0.1 hPa FS, equivalent to about 10 cm of altitude.
What resolution do the ZPA models offer?+
Both offer 0.01 hPa resolution.
What interfaces do the ZPA models support?+
ZPA-1 uses RS485. ZPA-2 supports RS485, RS422 and RS232.
What is the operating temperature range?+
ZPA-1 operates from -40°C to 85°C; ZPA-2 extends down to -55°C.
