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Model 55i Methane & Non-Methane Analyser

Model 55i Methane & Non-Methane Analyser Click here to enlarge image
Click here for Product Data Sheet

PRODUCT DESCRIPTION

The Thermo Scientific range of iSeries gas analysers have by far and away the least requirement for maintenance of any gas analysers on the market today and are built for reliable continuous duty field gas detection.

The Model 55i is a back-flush gas chromatography (GC) system designed for automated measurement of methane and non-methane hydrocarbons. Unlike instruments that measure only methane and total hydrocarbons, the back-flush GC method used by the Model 55i provides a direct measurement of non-methane concentrations. This allows accurate and precise measurement of low levels of non-methane hydrocarbons (NMHC), even in the presence of methane at much higher concentrations.

This state-of-the-art gas analyser offers features such as an Ethernet port as well as flash memory for increased data storage. Ethernet connectivity provides efficient remote access, allowing the user to download measurement information directly from the instrument without having to be on-site.

You can easily program soft-keys to allow you to jump directly to frequently accessed functions, menus or screens and the larger interface screen can display up to five lines of measurement information while the primary screen remains visible.

PRODUCT SPECIFICATIONS

Preset Ranges

0 -5, 50, 500 ppm, or 0 - 10, 100, 1000 ppm, or 0 - 20, 200, 2000 ppm , or 0 - 50, 500, 5000 ppm
Group selectable at time of order

Zero Noise

0.025 ppm RMS (300 second averaging time)

Minimum Detectable

0.050 ppm CH4 - 0.050 NMHC As Propane (300 second averaging time)

Zero Drift

Auto-zero each cycle

Span Drift (24 hr)

< 2% Span Value (without Auto Calibration)

Response Time (90%)

~ 70 seconds

Precision

2.0% of reading or 50 ppb (whichever is larger)

Linearity

+/-2.0% of span (at concentrations of 10% to 100% of span)

Sample Flow Rate

0.5 lpm, minimum

Makeup Air Flow Rate

275 ccm to 350 ccm Hydrocarbon free air

Fuel Flow Rate

25 ccm to 50ccm Hydrogen or ~100-150ccm H2/He Mixture

Carrier Gas Flow Rate

35 ccm to 70 ccm Nitrogen

Operating Temperature

+150C to +350C

Power Requirements

100 vac, 115 vac, 220-240 vac +/-10%, 50/60Hz, 420W

Size and Weight

16.75"(W) x 8.62"(H) x 23"(D), 60 lbs. (17.7 kg)

Outputs

Selectable Voltage, RS232/RS485, TCP/IP, 10 Status Relays, and Power Fail Indication
0-20 or 4-20 mA Isolated Current Output (optional)

Inputs

16 Digital Inputs (standard), 8 0-10vdc Analog Inputs (optional)


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