Thermo Scientific 55i Methane / Non-Methane Hydrocarbon Analyzer

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Thermo Scientific 55i

Measured parameters: CH₄ (Methane), THC / VOC (Hydrocarbons)

Measurement method: Flame Ionization (FID), Gas Chromatography

Thermo Scientific 55i methane and non-methane hydrocarbon (NMHC) analyzer, FID-based. Sold, installed and serviced in Türkiye by Tetra.

Installation, calibration, spare parts and service in Türkiye come from Tetra; cabinet and panel integration can be done at our İzmir facility.

Technical information

Measured gases
Methane (CH₄), NMHC
Measurement principle
Back-flush GC + FID
Preset ranges
0-5/50/500 ppm and other groups (selected on order)
Minimum detection
0.050 ppm
Response time (90%)
~70 seconds
Sample flow rate
0.5 L/min

55i is an analyzer that separately measures methane (CH₄) and non-methane hydrocarbons (NMHC). A back-flush gas chromatography column separates methane from other hydrocarbons; a flame ionization detector (FID) detects both components.

It is used for ambient air monitoring, at landfill and biogas sites and in VOC studies around refineries.

55i features

  • Automatic separate measurement of CH₄ and NMHC
  • Back-flush GC column and FID detector
  • Automatic zero in every cycle
  • Serial and analog outputs
  • Bench or rack mounting

Spare parts and consumables

Write to us for spare parts and consumables; the Tetra service team supplies and replaces the right original parts for your instrument.

Ask about spare parts →
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Tell us about your application; we will recommend the right model and configuration for the measuring point, process conditions and regulations.