GMD digital carbonation tester – CO₂ measurement for fermenter

The GMD digital carbonation tester is a high‑precision device designed to measure the CO₂ content of carbonated beverages in cylindroconical tanks, conditioning tanks or kegs. It provides automatic results in g/L and volumes, ideal for breweries performing regular carbonation checks.

The GMD connects to the sampling tap. Flow can be adjusted using the screw valve to avoid foam formation. Once the chamber is filled, the operator follows the software instructions: pressure release, piston activation, then measurement start. The piston system releases CO₂ quickly and reproducibly.

The device then measures partial pressure and temperature, and automatically calculates CO₂ concentration. It features internal memory capable of storing up to 400 measurements. On request, it can be equipped with a color touchscreen for improved ergonomics.

With more than 25 years of manufacturing experience, the GMD is a reliable, calibratable and repairable device, suitable for demanding environments, including ISO 9001/9002 certified companies.

Why choose this product?

• Automatic CO₂ calculation in g/L and volumes
• Very high precision, calibratable for ISO environments
• Fast and reproducible CO₂ release via piston

Technical specifications

• CO₂ range: 2 to 9.9 g/L (1 to 4 vol)
• CO₂ accuracy: 0.1 g/L or 0.05 vol
• Temperature: −3 to +30 °C (accuracy 0.1 °C)
• Pressure: 0–600 kPa (0–6 bar), accuracy 0.5%
• CO₂ reading: digital display
• Memory: 400 measurements
• Dimensions: 270 × 200 × 140 mm
• Weight: 2.8 kg
• Operation: pressure impulse via piston

Rolling Beers Tips

• Use the screw valve to adjust flow and avoid foam during sampling.
• Calibrate regularly to ensure accuracy, especially in ISO environments.
• Use the internal memory to track carbonation trends across multiple batches.

Technical FAQ

• What is the difference between GMA, GMAS and GMD? GMD calculates CO₂ automatically. GMA and GMAS are analog.
• Is the GMD suitable for professional breweries? Yes, it is designed for regular checks and ISO environments.
• Do I need to shake the device? No, the piston releases CO₂ automatically.