WIKA A2G-500 Differential Pressure Sensor
Digital HVAC differential pressure sensor for filter monitoring and building automation.
Original manufacturer: WIKA
Official Technical Source
Original manufacturer catalog / model documentation →
AirAlign lists the named model or family. Measurement ranges, communication and enclosure options may vary by exact ordering code; check current manufacturer datasheet before specifying a device.
Verified model variants: Manufacturer documentation lists analog voltage/current, Modbus RTU and LoRaWAN configurations depending on ordering code. A2G-500 is designed for air and non-flammable gases; hazardous-area Ex certification is not claimed. Official WIKA A2G-500 specification and downloads.
A2G-500 — differential-pressure sensor, not an airflow controller
WIKA A2G-500 measures differential, gauge and vacuum pressure in air and non-flammable, non-aggressive gases. Its temperature-compensated piezoresistive pressure measurement is intended for HVAC filter, duct and cleanroom monitoring; the A2G-520 is the separate air-flow-computing model and A2G-540 adds PID control.
| Topic | Original manufacturer details | Implementation and QA |
|---|---|---|
| Technology and accuracy | Piezoresistive, WIKA published nominal ±0.5% accuracy for the new A2G-500 family | Confirm whether accuracy is based on full scale or selected range and the test conditions in the specific ordering-code datasheet; no blanket alarm accuracy. |
| Measuring modes | Differential pressure, positive gauge pressure or vacuum pressure; freely configurable range | The same two pneumatic ports require correct direction and range selection; do not report absolute atmospheric pressure. |
| Electrical/digital variants | Analogue voltage/current, RS-485 Modbus RTU or LoRaWAN, depending on order | LoRaWAN is an optional radio variant; NFC is used for device configuration and is not a continuous measurement bus. |
| Installation and mechanics | IP65 enclosure; WIKA app/NFC setup; optional 2-inch TFT colour display and relay outputs | A relay-equipped 500 can serve two-point switching; it is not the proportional multi-mode A2G-540 controller. |
| Hazardous-area and media | Non-flammable/non-aggressive gases, no OEM Ex certificate confirmed here | Keep refrigerant/combustible gases and explosive atmospheres outside claims pending certified variant. |
Reference documents and exact-variant requirements
Only the stated model/family is compared here. Confirm purchase suffix, pressure port type, zero/span procedure, required supply, output signal, environmental enclosure, individual approvals and photos before final equipment selection. Model numbers, URLs and manufacturer links already on this page are preserved.
OEM sources: WIKA A2G-500 current model page · WIKA new 500/520/540 model announcement.