WIKA A2G-50 Differential Pressure Sensor
Air-conditioning and ventilation differential pressure sensing.
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.
A2G-50 — older analogue/Modbus HVAC transmitter
The WIKA A2G-50 is an established compact piezoresistive differential-pressure transmitter, distinct from the modern A2G-500 platform. It is used on air filters, cleanrooms and HVAC ducts, and instrument options change sensor span, display, zero-point setting and available communication.
| Topic | Original manufacturer details | Implementation and QA |
|---|---|---|
| Output topology | Selectable 0–10 V or 4–20 mA, 3-wire; Modbus RTU option | A 4–20 mA loop here does not justify assuming a generic two-wire loop power supply. |
| Maximum process pressure | 20 kPa maximum operating pressure per WIKA model page | This is not the same as the calibrated differential pressure span; avoid exceeding common-mode or port pressure limits. |
| Measuring ranges | Multiple switchable Pa/mbar models, including smaller ±250 Pa and larger 0–12,000 Pa order classes | Check the ordered sensor pressure class and internal scaling jumpers before replacing a device. |
| Accuracy conditions | WIKA operating manual distinguishes pressure accuracy below/above 125 Pa and separate voltage/current-output error | Do not condense all accuracy components into a universal ±1%; verify the exact variant table. |
| Power variants | With autozero: AC/DC 24 V ±10%; other analogue variants have output-dependent supply range | Do not wire a Modbus or autozero variant using an unverified analogue unit’s power diagram. |
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-50 original model data · WIKA A2G-50 configuration shop data.