Air Flow Meter

AFG-20 Battery Operated Air Flow Gauge Product Description

Electronet Series AFG-20 is a Digital Air Flow Gauge designed for fast, easy, and trouble-free operation. It works on the differential pressure flow measurement principle, making it a cost-effective and reliable solution for monitoring compressed air flow rates.
The device features a display shut-off facility, allowing the display to be activated only when required via push button. This helps conserve battery power and ensures long-lasting battery life.

Features

• Suitable for compressed air applications

• Integral flow indicator

• Compact & cost-effective design

• Line size options: 15 NB to 50 NB

• Zero tare facility

• Auto display shut-off feature

• Electronics enclosure MOC: SS 304 / SS 316

• Battery operated

• Reliable and long-life performance

• Repeat zero tare feature

  Technical Specifications General

• Line Size: 15 NB to 50 NB

• Accuracy: ±1% of F.S.

• Repeatability: ±0.5% of F.S.

• Response Time: < 200 mSec

• Temperature Coefficient: ±0.01% per °C

Materials of Construction (MOC)

• Plate: AISI 316, AISI 304, Hastelloy-C (others on request)

• Body: SS-304 / SS-316

• Gasket: PTFE (others on request)

• Electronics Enclosure: SS / Die-cast Aluminum, IP-65 / Flameproof

Process & Operating Conditions

• Operating Temperature: 0 to 120°C (higher on request)

• Process Temperature: –40 to 120°C max

• Operating Pressure: 0 to 25 kg/cm² (higher on request)

• Burst Pressure: 2× maximum pressure range

• Over-Range Protection: 1.5× maximum operating pressure

• Operating Conditions: –20 to 70°C / 5–95% RH (non-condensing)

Sensor & Connections

• Sensor Type: Piezo-resistive

• Process Connection:

  1. Threaded BSP(F)

  2. Flanged (ASA 150 B 16.5)

  3. Socket Weld

Display

• Type: 8-digit dot-matrix LCD

• Display Activation: Press “ON” key on front fascia

• Programmable Display Duration:

  • 1 min

  • 2 min

  • 5 min

  • Continuous ON (Cont.)

Power

• Power Supply: 3.6V battery

• Battery Backup: Approx. 2000 hours

Mounting

• Direct line mounting

Protection Class

• Weatherproof IP-65

Features

• Suitable for compressed air applications

• Integral flow indicator, totaliser, and transmitter

• No external accessories required

• Line size: 15NB to 50NB

• Maintenance-free operation

• Durable SS-316 enclosure for superior corrosion resistance

• IP-68 protection for reliable operation in harsh and wet environments

  Technical Specifications

• Line Size: 15NB to 50NB

• Accuracy: ±2% of F.S

• Repeatability: ±0.5% of F.S

• Power Supply: 18 to 36V DC

• Display: Backlight LCD

• Output: 4 to 20 mA

• Additional Output (Optional):

  • 1 Relay Output

  • RS-485 MODBUS RTU

• Connector: M12 Connector

• Protection: Weather-proof IP-68

• Electronics Enclosure: SS-316

• Flow Tube: SS-316

• Plate: SS-316

• Sensor Diaphragm: SS-316L / SS-304

• Gasket: PTFE (others on request)

• Sensor Type: Piezo-resistive

• Alarm/Relay Output: Available

• Communication Output: RS-485 (optional)

• Electrical Connection: M12

• Ambient Temperature: -20°C to 70°C

• Ambient Humidity: 5% to 95% (non-condensing at 25°C)

• Process Connection: Standard (custom options available)