Gas analyzer 700 LX

processconcentrationinfrared absorption

Presentation
The ENVEA 700 LX NDIR analyser performs gas measurements based on infrared absorption characteristics. It uses a modulated infrared beam and a microflow two‑chamber detector to deliver stable, repeatable concentration results for IR‑active gases, with oxygen measured by paramagnetic or fuel‑cell technology.

Measuring principle
A modulated IR beam passes through a sample cell where a portion of the beam energy is absorbed by the target gas. The attenuated beam enters a two‑chamber microflow detector filled with the target gas; the pressure difference between chambers produces a small flow measured by a microflow sensor and converted to an output signal. O₂ is measured using paramagnetic or fuel‑cell sensors and displayed as a percentage.

Features and benefits

• IR measurement range from low ppm up to 100% full scale; O₂ ranges from 0–1% (paramagnetic) to 0–100%
• Multicomponent capability: up to three IR channels or two IR channels plus O₂
• Automatic calibration and auto‑ranging
• Fast response time with temperature and pressure compensation
• Robust Linux‑based operating system
• Remote control and monitoring via RS‑232, TCP/IP or digital inputs
• Comprehensive diagnostics and standard outputs (voltage, current, RS‑232 AK, TCP/IP, MODBUS or AK protocols)

Options

• Internal sampling pump
• Sample flow regulation
• Multiple sampling streams
• 19" rack mount slides

Main applications

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

Approvals / Compliance

• Conforms to UL 61010-1 (Certified to CAN/CSA C22.2 No. 61010.1)
• U.S. EPA compliance: 40 CFR PART 1065
• ECE R49-06 compliant

Technical characteristics / specifications

• Measured gases: CO, CO₂, CH₄, SO₂, NO (NO via external NOx converter) and O₂
• O₂ ranges: 0–1% (paramagnetic) up to 0–100% FS, four configurable ranges
• IR analysis method: Non‑Dispersive Infrared (NDIR)
• Detector type: Microflow (two‑chamber)
• NDIR ranges: 10:1
• Resolution: typically 0.1% FS
• Repeatability: <0.5% FS
• Linearity: <1.0% FS (factory calibrated ranges)
• Accuracy/Precision: typically <1% FS
• Noise: <1% FS
• Zero/span drift: <1% FS per 24 h
• Zero/span adjustment: via front panel, TCP/IP, RS‑232 or digital input
• Sample flow rate: 0.5–2.0 L/min
• Sample temperature: up to 50 °C (non‑condensing)
• Ambient temperature: 5–40 °C
• Dimensions (H×W×D): 134 × 483 × 584 mm
• Weight: 13.6–20 kg (depending on configuration)