Model A2G-500 / A2G-520
WIKA A2G-500 differential pressure sensor and A2G-520 air flow sensor for ventilation and air-conditioning. Ranges to 0…12,000 Pa (A2G-500) and 0…7,000 Pa (A2G-520), 0.50 % FS accuracy, analogue, Modbus RTU and LoRaWAN output, NFC configuration, 2″ TFT display, IP65.
Prices on request. Contact us for availability and quotations.
The WIKA A2G-500 and A2G-520 are differential pressure instruments for ventilation and air-conditioning plant, measuring differential pressure, gauge pressure and vacuum in air and other non-aggressive, non-flammable media. They are used for filter, fan and heat exchanger monitoring and for pressure monitoring in ducts, laboratories, production areas and clean rooms. The measuring element is a piezo cell and accuracy is 0.50 % FS.
Measuring ranges are freely adjustable within an operating range that is fixed by the model code. The A2G-500 covers ±250, ±2,500, ±7,000 and ±12,000 Pa, with individual ranges from -25…+25 Pa up to 0…12,000 Pa [0…48 inWC]. The A2G-520 covers ±250, ±2,500 and ±7,000 Pa, so its upper limit is 0…7,000 Pa [0…28 inWC], not 12,000 Pa. Ranges are set through the instrument menu, the HMI or the WIKA app over NFC.
Output options are DC 0…10 V, 0…5 V or 2…10 V three-wire and 4…20 mA two- or three-wire, up to two relays, digital Modbus RTU over RS-485, and wireless LoRaWAN on LoRa 868 MHz EU with a range of up to 10 km [6.21 miles] in free-field conditions. A 240 × 320 dpi 2″ TFT colour display can show up to four measured values and two relay states. Two voltage and two resistance inputs accept DC 0…10 V, 0…5 V, 2…10 V, Pt1000, Ni1000, Ni1000-LG, NTC 10 kΩ or a binary signal.
In addition, the A2G-520 computes air flow from the differential pressure across a fan or a pitot tube such as the A2G-FM, using that element's K factor, and displays air flow over 0…999,999 m³/h in l/s, m³/s, m³/h or cfm, and velocity in m/s or fpm. Both instruments take AC or DC 24 V ±10 %, connect through two Ø 5 / 7 mm nozzles for hoses of 4…6 mm inner diameter, and are IP65 in a PC GF20 case.
| Operating Range (A2G-500) | ±250, ±2,500, ±7,000 and ±12,000 Pa; individual measuring ranges from -25…+25 Pa to 0…12,000 Pa [0…48 inWC] |
|---|---|
| Operating Range (A2G-520) | ±250, ±2,500 and ±7,000 Pa; individual measuring ranges from -25…+25 Pa to 0…7,000 Pa [0…28 inWC] |
| Accuracy | 0.50 % FS |
| Measuring Element | Piezo measuring cell |
| Output Signal | DC 0…10 V, 0…5 V or 2…10 V (3-wire); 4…20 mA (2- or 3-wire); up to two relays; Modbus RTU over RS-485; LoRaWAN |
| Wireless | LoRa 868 MHz EU; range ≤ 10 km [≤ 6.21 miles] in free-field conditions with spreading factor 12 |
| Display | 2″ TFT colour display, 240 × 320 dpi; up to four measured values and two relay states |
| Configuration | NFC via the WIKA app; also the instrument menu and display, or the HMI with buttons and LEDs on the A2G-500 |
| Signal Inputs | 2 × voltage input DC 0…10 V, 0…5 V or 2…10 V; 2 × resistance input Pt1000, Ni1000, Ni1000-LG, NTC 10 kΩ or binary |
| Air Flow Measurement (A2G-520) | 0…999,999 m³/h; units l/s, m³/s, m³/h, cfm; air velocity in m/s or fpm; calculated from the K factor of the connected element |
| Process Connection | 2 × connecting nozzle Ø 5 mm / Ø 7 mm for hoses of 4…6 mm inner diameter |
| Power Supply | AC 24 V ±10 % 50/60 Hz or DC 24 V ±10 %; protection class III, SELV |
| Case Material | PC GF20, flame retardant in accordance with UL94-V2 |
| Medium & Ambient Temperature | -40…+60 °C [-40…+140 °F]; -20…+60 °C with display; -10…+50 °C with automatic zero point setting |
| Ingress Protection | IP65 for the complete instrument |
