Methane analyzer 700 LX MHFID

total hydrocarbonprocessconcentration

Overview The ENVEA 700 LX MHFID is a continuous Flame Ionization Detector (FID) analyzer for measuring methane or total hydrocarbons (THC) in gaseous samples. The instrument includes a heated oven (191 °C), a burner and optional heated sample pump, delivering fast, sensitive and stable measurements for industrial monitoring and process control.

Operating principle A controlled flame sustained by air and hydrogen (or hydrogen mix) ionizes the sample. Resulting ions are collected between two electrodes; the measured ion current is directly proportional to hydrocarbon concentration. The heated oven prevents condensation and stabilizes response for elevated sample temperatures up to 191 °C.

Features and benefits

• Selectable measurement of Methane-only or Total Hydrocarbons (THC)
• Sensitivity from approximately 30 ppm up to 3% Full Scale as methane
• Four user-definable ranges (e.g. 0–30 ppm to 0–30,000 ppm as CH4)
• Fast response: 90% Full Scale in ~3 seconds
• Auto-calibration and automatic ranging
• Electronic flow control and temperature-stabilized detector
• Automatic fuel/air shut-off and comprehensive diagnostics
• Standard outputs: Voltage, Current, RS-232 (AK protocol), TCP/IP (MODBUS and AK protocol)

Options

• Internal heated sample pump
• Internal solenoid valves
• 19-inch rack mount slides

Main applications

• Combustion efficiency monitoring
• Process gas analysis and control
• Fuel cell testing and analysis
• Turbine/generator feedback control
• Personnel safety and leak detection
• Vehicle and industrial emissions monitoring

Technical specifications

• Model: ENVEA 700 LX MHFID
• Detector: Flame Ionization Detection (FID)
• Response time: 90% Full Scale in ~3 s
• Ranges: Four user-definable ranges (typ. 0–30 to 0–30,000 ppm as CH4; 0–10 to 0–10,000 ppm as C3H8)
• Resolution / Detection limit: 10 ppb C
• Repeatability: <0.5% FS
• Linearity / Accuracy: <1% FS
• Noise: <1% FS
• Zero & span drift: <1% FS per 24 h
• Sample flow rate: typically 1.5–2.5 L/min
• Air requirements: purified air <1 ppm C or synthetic air (300 cc/min for H2/He; 400 cc/min for H2)
• Air inlet pressure: 25 psig
• Outputs: Voltage, Current, RS-232 AK, TCP/IP MODBUS & AK protocol
• Display: 3" x 5" LED/LCD
• Sample/oven temperature: up to 191 °C (non-condensing)
• Ambient: 5 °C to 40 °C, <90% RH (non-condensing)
• Warm-up time: ~1 hour
• Fittings: 1/4" tube
• Power: 115/230 VAC (±10%), 50/60 Hz, max 750 W
• Dimensions & weight: 5¼ H x 19 W x 23 D (inches) / ~50 lbs

Certifications & downloads CE marking and ETL listed (meets UL 61010-1 / certified to CAN/CSA C22.2 No. 61010-1). CEMS catalogue (PDF) available in product downloads.