Gas analyzer 700LX CLD NOx/O2

processfor pharmaceutical productsfor the chemical industry

Product overview
The ENVEA 700 LX CLD/O2 analyzer uses chemiluminescence to quantify NO and NOx in gas samples and includes a paramagnetic channel for O2 (0–25%). Designed for continuous process and emissions monitoring, it features auto‑calibration, electronic flow control and a Linux‑based operating system for reliable diagnostics.

Measurement principle
In NO mode, nitric oxide (NO) reacts with ozone (O3) producing an excited NO2* that emits light proportional to NO concentration, detected by a photodiode. In NOx mode, NO2 is converted to NO before detection to provide total NOx readings.

Features and benefits

• Measuring range: full scale from 3 ppm to 3,000 ppm (user‑definable ranges)
• Three measurement modes: NO, NOx and NO/NO2/NOx
• Paramagnetic O2 channel (0–25%)
• Auto calibration and auto ranging
• Fast response time (typ. < 3 s to 90% FS)
• Electronic sample and ozone flow control; no vacuum pump required
• Robust Linux‑based OS with comprehensive diagnostics
• Standard outputs: voltage, current, RS‑232 AK, TCP/IP MODBUS, alarms and status

Options

• Internal sample pump
• Internal calibration solenoid valves
• Internal ozone pump
• Low‑flow and low‑pressure configurations
• 19" rack mount slides

Main applications

• Combustion efficiency monitoring
• Fuel cell testing
• Turbine/generator feedback control
• Ammonia slip / process leak detection
• Process chemical gas analysis
• Pharmaceutical process monitoring
• Vehicle emissions testing
• Site safety and environmental compliance

Technical information
Measuring ranges: NO/NOx — 4 user‑definable ranges from 0–3 to 0–3,000 ppm; higher ranges on request.
Detector: photodiode.
Response time: typically < 3 s to 90% FS.
Repeatability / Precision: < 0.5% FS. Linearity / Accuracy: <= 1% FS. Zero & span drift: < 1% FS per 24 h.
Interference effects: CO2 < 2% at 10% CO2; H2O < 1% at 1% H2O; CO, HCN, SO2, NH3, N2O not detectable at 100 ppm.
Sample flow rate: typically 1.5–2.5 L/min (0.6 L/min with low‑flow option).
Sample temperature max: 50°C (non‑condensing). Ambient: 5–40°C, < 90% RH (non‑condensing).
Power: 115/230 VAC, 50/60 Hz, 560 W.
Dimensions (HxWxD) & weight: 5.25 x 19 x 23 in. / ~45 lbs.

Approvals and certifications

• CE
• U.S. EPA compliance: 40 CFR Part 1065
• Conforms to UL 61010‑1; certified to CAN/CSA C22.2 No. 61010‑1
• ECE R49‑06 compliant

Technical specifications

• Model: 700 LX CLD/O2
• Measurement principle: chemiluminescence for NO/NOx; paramagnetic O2 channel
• Typical full scale: 3–3,000 ppm (configurable)
• Detector: photodiode
• Response time: < 3 s (T90)
• Outputs: voltage, current, RS‑232 AK, MODBUS TCP/IP, alarms/status
• Mounting: 19" rack option