The BENETECH GM520 digital differential manometer is a precision instrument for measuring overpressure, vacuum, and differential pressure across a wide range of applications – from ventilation systems and air filters to combustion process diagnostics.

Key features:

• Wide selection of units
  Results can be displayed in 11 units: bar, mbar, kPa, kgf/cm², mmHg, cmH₂O, Ozf/in², psi, inHg, inH₂O, and ftH₂O – making the GM520 adaptable to any measurement system.

• Measurement range 0 – 0.35 bar
  Accuracy ±0.3 % FSO (25 °C) and repeatability ±0.2 % ensure reliable readings both in service and in laboratory use.

• Data memory and export
  The built-in recording function allows archiving of results, while the USB port enables instant transfer to a Windows PC.

• Dedicated software
  The free “Manometer” application records real-time measurements, generates charts, and with one click exports data to Excel (xls) or saves graph images (PNG).

• User-oriented solutions
  Auto power-off extends the life of four AAA batteries, the low-battery indicator prevents data loss, and overloads are signaled with Err1/Err2 messages.

Technical specification:

• Accuracy: ±0.3 % FSO (25 °C)

• Repeatability: ±0.2 % (max ±0.5 % FSO)

• Linearity / hysteresis: ±0.29 % FSO

• Response time: ~0.5 s

• Power supply: 4 × 1.5 V AAA

• Operating temperature: 0 – 50 °C

• Storage temperature: –10 – 60 °C

Resolution / measurement range

• 0.001 bar / 0 – 0.35 bar

• 0.1 mbar / 0 – 350 mbar

• 0.01 kPa / 0 – 35 kPa

• 0.001 kgf/cm² / 0 – 0.356 kgf/cm²

• 0.1 mmHg / 0 – 262.5 mmHg

• 0.1 cmH₂O / 0 – 356.6 cmH₂O

• 0.01 Ozf/in² / 0 – 81.20 Ozf/in²

• 0.001 psi / 0 – 5.076 psi

• 0.01 inHg / 0 – 10.33 inHg

• 0.1 inH₂O / 0 – 140.3 inH₂O

• 0.01 ftH₂O / 0 – 11.69 ftH₂O

Applications

• monitoring pressure differences across filters and dampers,

• testing fans, air conditioning, and HVAC systems,

• measuring in furnaces and boilers (flue gas draft monitoring),

• servicing pneumatic installations and laboratory vacuum systems.

BENETECH GM520 combines measurement accuracy with the convenience of digital recording – a reliable tool for installers, service technicians, and engineers.

DESCRIPTION OF HOUSING ELEMENTS:

1. Pressure inputs.

2. LCD display.

3. Differential button.

4. Unit selection button.

5. Backlight button.

6. HOLD function button.

7. Data recording button.

8. Power button.

DESCRIPTION OF DISPLAY ELEMENTS:

1. Hold function.

2. Data recording mode.

3. USB connection.

4. Low battery indicator.

5. Differential mode (DIF).

6. Maximum/minimum/average.

7. Measurement value.

8. Pressure unit.

9. Data recording time.

PACKAGE CONTENTS:

• 1 × Manometer

• 4 × 1.5V AAA batteries

• 1 × User manual (Polish/UA)

• 1 × USB cable

• 2 × Milky silicone tubes

• 2 × Transparent PVC tubes

• Software available for download (electronic version)

BENETECH is a manufacturer of professional measuring and control instruments.
All products meet high quality standards and undergo full inspection before shipment.