Food Science Instruments


Portable Ethylene Analyzer

The F-900 Portable Ethylene Analyzer provides measurements of ethylene in real time. Quality Assurance professionals use the F-900 to collect the data they need to manage ethylene gas accurately and efficiently—in controlled atmosphere facilities, cold storage, and shipping containers. 

Until recently, sensitive ethylene measurements were available only through complex and expensive gas sampling and gas chromatography analysis. The F-900 is an economical, yet precise, solution to ethylene measurement.   

The F-900 Research Kit enables the stand-alone unit to take in-situ measurements of ethylene flux from fruits and leaves non-destructively. By using the Injection Port Kit, users can take small-volume, point-in-time measurements of ethylene. Additional sensors for measuring CO2 and O2 can be added to the F-900 for complete ripening gas analysis. 


  • Highly sensitive C2H4 sensors
    with a lower detection limit of
    .04 ppm (40 ppb)
  • Performs non-destructive measurements
  • Rapid response time
  • Functional across broad temperature and humidity range
  • CO2 and O2 sensing capability (optional)
  • Compact and lightweight (2.43 Kg)
  • Real-time, continuous monitoring
  • Internal data logging and storage (4 GB SD card)
  • User adjustable sampling rate
  • Terminal block for communication with ventilation or other controlled atmosphere systems
  • Optional Injection Port Kit for small volume static samples
  • Transflective display enables easy viewing in varied light conditions
  • Functional across a broad temperature and humidity range


Main Unit

Air Sampling Rate: 80 ml/min

Measuring Rate: 1 second intervals, open or closed loop

Display: Sunlight visible transflective LCD

Operating Environment: 0°C - 45°C; 0-90% humidity non-condensing

Battery Capacity: 5 hours - Rechargeable Li-Ion (5000 mAh)

Dimensions: 255 mm (L) x 210 mm (W) x 138 mm (H; includes body with legs)

Weight: 2.96 kg

Enclosure: Anodized aluminum

Warm-up Time: 1 min (C2H4)

C2H4 PPB Sensor

Sensor Type: Electrochemical

Range: 0-10 ppm

Resolution: 0.001 ppm

Accuracy: 5% ± 0.025 ppm

Lower Detection Limit: 0.025 ppm (25 ppb)

C2H4 PPM Sensor

Sensor Type: Electrochemical

Range: 0-200 ppm

Resolution: 0.1 ppm

Accuracy: 5% ± 0.5 ppm

Lower Detection Limit: 0.5 ppm

CO2 PPM Sensor (optional)

Sensor Type: Low-power non-dispersive infrared gas analyzer

Range: 0-2000 ppm

Resolution: 0.1 ppm

Accuracy: 5%

CO2 PCT Sensor (optional)

Sensor Type: Infrared sensor, pyroelectric detector

Range: 0-20%

Resolution: 0.01%

Accuracy: 5%

O2 Sensor (optional)

Sensor Type: Electrochemical

Range: 0-100%

Resolution: 0.1%

Accuracy: 5%

Calibration Schedule

Sensor Set Zero Set Span

C2H4 ppb Weekly 3 months+

C2H4 ppm Weekly 3 months*

CO2 ppm Weekly 6 months*

CO2 PCT 6 months 6 months*

O2 6 months 6 months*

* Standard gas required

Typically < 5% per month


  • Monitoring controlled atmosphere facilities to ensure ethylene levels do not exceed critical thresholds
  • Inspecting shipping containers for levels of ethylene production or accumulation
  • Measuring flux from a single fruit to understand how ethylene emission levels may vary across treatments
  • Measuring head-space accumulation for analysis of small-volume samples or fruits with low ethylene emission rates