# Dual differential pressure sensor — A2G-52

> For ventilation and air-conditioning

- Catalog code: a2g_52
- Model: A2G-52
- Category: Pressure measurement › Pressure sensors
- Product page: https://avigan.com.ua/wika/en/products/a2g_52
- Price: on request
- Supplier: AVIGAN (TOV VIKA Prylad), official WIKA partner in Ukraine

## Overview

Model A2G-52 Dual differential pressure sensor ✓For ventilation and air-conditioning ✓High quality ►To the information!

## Applications

- For monitoring air, non-inflammable and non-aggressive gases
- Fan, blower and filter monitoring
- Pressure and flow monitoring
- Monitoring and control of valves and air shutters
- Pressure monitoring in clean rooms

## Special features

- Simple mounting
- Two differential pressure sensors in one instrument
- Two inputs for temperature sensors or analogue signal
- With Modbus ® interface
- Two-line LC display for the direct reading of both pressure values

## Specifications

| Parameter | Value |
|---|---|
| model | A2G-52 |
| product family | A2G |
| short description | Dual differential pressure sensor with Modbus interface for ventilation and air-conditioning, combining two differential pressure sensors and inputs for temperature or analogue signals. |
| subcategory | Differential pressure sensor |
| certifications | RoHS; WEEE; EAC; GOST; MTSCHS; CE |
| ambient temp | -20 … 70 °C |
| ip rating | IP54 |
| weight kg | 0.15 |
| languages in datasheet | en |
| pressure ranges | -250 … 2500 Pa; -250 … 7500 Pa |
| accuracy class | ±2 Pa + 1 % (for pressure < 125 Pa), ±1 Pa + 1 % (for pressure > 125 Pa) for -250...+2,500 Pa range; ±2 Pa + 1.5 %, ±1 Pa + 1.5 % for -250...+7,000 Pa range |
| process connections | Connecting nozzle (copper alloy), lower mount, for hoses with inner diameter 4 mm; Connecting nozzle (copper alloy), lower mount, for hoses with inner diameter 4mm |
| case material | Plastic (ABS); Cover: Polycarbonate (PC) |
| wetted parts material | Copper alloy |
| process temp | -10 … 50 °C |
| output signal | Modbus® RTU; Modbus; Modbus® |
| power supply | AC 24 V or DC 24 V ±10 % |
| electrical connection | Cable gland M20, 2 x 4 spring-clip terminals, max. 1.5 mm² |

## Datasheet tables

### Dual differential pressure sensor, model A2G-52

| Measuring element | Piezo measuring cell |
|---|---|
| Units of measure | Pa, mbar, inWC, mmWC, psi |
| Measuring range | -250 …+2,500 Pa and -250 …+7,500 Pa |
| Accuracy class | -250 ... +2,500 Pa = pressure < 125Pa=±2Pa+1% pressure > 125Pa=±1Pa+1% -250 ... +7,000 Pa = pressure < 125 Pa = ±2 Pa + 1.5% pressure > 125 Pa = ±1 Pa + 1.5% all data refer to the current measured value (of measured pressure) |
| Process connection | Connecting nozzle (copper alloy), lower mount, for hoses with inner diameter4mm |
| Power supply U B | AC 24V or DC 24V ±10% |
| Electrical connection | Cable gland M20 2 x 4 spring-clip terminals, max.1.5mm 2 |
| Output signal | Modbus ® |
| Display | Two-line LC display (12 characters/line) Line 1: Active measurement, input A Line 2: Active measurement, input B |
| Case | Plastic (ABS) Cover: Polycarbonate (PC) |
| Permissible temperatures ■ Ambient temperature ■ Medium temperature | -20 ...+70 °C -10 ...+50 °C |
| Relative humidity | 0 …95%r.h., non-condensing |
| Ingress protection | IP54 |
| Weight | 150 g |

### Modbus ® communication

| Protocol | Modbus ® via serial interface |
|---|---|
| Transfer mode | RTU |
| Interface | RS-485 |
| Byte format | (11 bits) in RTU mode Coding system: 8 bits binary Bits per byte: - 1 Start bit - 8 data bits, lowest-order bit is sent first - 1 bit for parity - 1 stop bit |
| Baud rate | 9,600, 19,200, 38,400 - adjustable in the configuration |
| Modbus ® addresses | 1 ... 247 addresses - adjustable in the configuration |

| Register | Parameter description | Data type | Value | Display |
|---|---|---|---|---|
| 3x0001 | Program version | 16 bit | 0 ... 1,000 | 0.00 ... 99.00 |
| 3x0002 | Pressure measurement A | 16 bit | -250 ... 2,500 | -250 ... 2,500 (Pa) |
| 3x0003 | Pressure measurement B | 16 bit | -250 ... 2,500 | -250 ... 2,500 (Pa) |
| 3x0004 | Input 1: 0 ...10V | 16 bit | 0 ... 1,000 | 0 ...100% |
| 3x0005 | Input 1: Pt1000 | 16 bit | 500 ... 500 | -50 ...+50 °C |
| 3x0006 | Input 1: Ni1000 | 16 bit | -500 ... 500 | -50 ...+50 °C |
| 3x0007 | Input 1: Ni1000-LG | 16 bit | -500 ... 500 | -50 ...+50 °C |
| 3x0008 | Input 1:NTC10k | 16 bit | -500 ... 500 | -50 ...+50 °C |
| 3x0009 | Input 2: 0 ...10V | 16 bit | 0 ... 1,000 | 0 ...100% |
| 3x0010 | Input 2: Pt1000 | 16 bit | -500 ... 500 | -50 ...+50 °C |
| 3x0011 | Input 2: Ni1000 | 16 bit | -500 ... 500 | -50 ...+50 °C |
| 3x0012 | Input 2: Ni1000-L | 16 bit | -500 ... 500 | -50 ...+50 °C |
| 3x0013 | Input 2:NTC10k | 16 bit | -500 ... 500 | -50 ...+50 °C |

| Register | Parameter description | Data type | Value | Display |
|---|---|---|---|---|
| 1x0001 | Input 1: BIN IN | Bit 0 | 0 ... 1 | On - Off |
| 1x0002 | Input 2: BIN IN | Bit 0 | 0 ... 1 | On - Off |

| Register | Parameter description | Data type | Value | Display |
|---|---|---|---|---|
| 0x0001 | Zeroing | Bit 0 | 0 ... 1 | On - Off |

| Register | Parameter description | Data type | Value | Display |
|---|---|---|---|---|
| 4x0001 | Beta value of NTC resistor | 16 bit | 0 ... 30,000 | 0 ... 30,000 (standard 4,220) |

| Description | Order number |
|---|---|
| A2G-52 with measuring range -250 ... +2,500 Pa | 40399907 |
| A2G-52 with measuring range -250 ... +7,000 Pa | 40399920 |

| Description | Order number |
|---|---|
| Measuring hoses |  |
| PVC hose, inner diameter 4 mm, roll at 25m | 40217841 |
| PVC hose, inner diameter 6 mm, roll at 25m | 40217850 |
| Silicone hose, inner diameter 4 mm, roll at 25m | 40208940 |
| Silicone hose, inner diameter 6 mm, roll at 25m | 40208958 |
| Duct connector for hose 4 and6mm | 40217507 |

| Logo | Description | Country |
|---|---|---|
|  | EU declaration of conformity ■ EMCdirective ■ RoHS conformity ■ WEEE directive | European Union |
|  | EAC (option) ■ EMCdirective ■ Import certificate | Eurasian Economic Community |
|  | GOST (option) Metrology, measurement technology | Russia |
| - | MTSCHS (option) Permission for commissioning | Kazakhstan |

## Documents

- [ds_pe8803_en_co_a67787](https://avigan.com.ua/wika/docs/wika/ds_pe8803_en_co.pdf) — PDF, 1206 KB, en