Model A2G-50 / A2G-55
WIKA A2G-50 and A2G-55 air2guide differential pressure sensors for ventilation and air-conditioning. A2G-50: jumper-set ranges to 0…12,000 Pa, 0…10 V or 4…20 mA, optional Modbus and LC display, IP54. A2G-55: fixed ranges to 0…5,000 Pa, ±2.5 % FS, IP65.
Prices on request. Contact us for availability and quotations.
The WIKA A2G-50 and A2G-55 are compact differential pressure sensors from the air2guide range, used to measure differential and static pressures of air and non-aggressive media — typically for filter monitoring and for overpressure monitoring in clean rooms and laboratories. Both use a piezo measuring cell and connect directly to a control or building management system.
The A2G-50 is the higher-specified unit. Its measuring range is set with jumpers within one of four variants: 0…2,500 Pa, 0…7,000 Pa, -250…+250 Pa or 0…12,000 Pa. Accuracy on the 250 and 2,500 Pa variants is 1 % ±2 Pa below 125 Pa and 1 % ±1 Pa above it, and on the 7,000 and 12,000 Pa variants 1.5 % ±2 Pa below 125 Pa and 1.5 % ±1 Pa above it. Output is DC 0…10 V or 4…20 mA three-wire, with optional Modbus RTU over RS-485 on the -250…+2,500 Pa and -250…+7,000 Pa ranges, an optional backlit two-line LC display and automatic zero point setting. The case is ABS with IP54 protection, medium temperature -20…+50 °C and ambient -40…+70 °C.
The A2G-55 is the lower-cost Eco transmitter with fixed measuring ranges: 0…250, 500, 750, 1,000, 1,250, 2,500, 3,750 and 5,000 Pa. Accuracy is ±2.5 % FS, output is 0…10 V with 4…20 mA optional, supply is DC 13…32 V (AC 13…32 V optional), and the ABS case is IP65 with an M16 cable gland and vertical wall mounting. Medium and ambient temperature are both -10…+50 °C.
When ordering, state which model is required, the measuring range or range variant, the output signal, and — for the A2G-50 — whether the display, Modbus output or automatic zero point setting is needed, since these affect the permissible supply voltage.
| Measuring Range (A2G-50) | Four jumper-set variants: 0…2,500 Pa; 0…7,000 Pa; -250…+250 Pa; 0…12,000 Pa (individual ranges within each variant) |
|---|---|
| Measuring Range (A2G-55) | Fixed: 0…250, 0…500, 0…750, 0…1,000, 0…1,250, 0…2,500, 0…3,750 and 0…5,000 Pa |
| Accuracy (A2G-50) | 0…250 and 0…2,500 Pa ranges: 1 % ±2 Pa below 125 Pa, 1 % ±1 Pa above 125 Pa; 0…7,000 and 0…12,000 Pa ranges: 1.5 % ±2 Pa below 125 Pa, 1.5 % ±1 Pa above 125 Pa (all referred to the measured pressure) |
| Accuracy (A2G-55) | ±2.5 % FS |
| Measuring Element | Piezo measuring cell |
| Output Signal (A2G-50) | DC 0…10 V (3-wire); 4…20 mA (3-wire); Modbus RTU over RS-485 on the -250…+2,500 Pa and -250…+7,000 Pa ranges |
| Output Signal (A2G-55) | 0…10 V; 4…20 mA optional |
| Power Supply (A2G-50) | AC 24 V or DC 24 V ±10 % with automatic zero point setting; DC 14…30 V or AC 24 V ±10 % for 0…10 V; DC 9…30 V or AC 24 V ±10 % for 4…20 mA |
| Power Supply (A2G-55) | DC 13…32 V; AC 13…32 V optional |
| Display (A2G-50) | Optional backlit LC display, 2 lines of 12 characters |
| Process Connection | A2G-50: ABS connecting nozzle, lower mount, for hoses of 4…6 mm inner diameter. A2G-55: for hoses of 5.5 mm inner diameter |
| Case Material | A2G-50: plastic (ABS). A2G-55: plastic (ABS) |
| Ingress Protection | A2G-50: IP54 per IEC 60529. A2G-55: IP65 |
| Temperature Range | A2G-50: medium -20…+50 °C, or -5…+50 °C with automatic zero point setting; ambient -40…+70 °C. A2G-55: medium and ambient -10…+50 °C |
