EAA-22 - Economical Ammonia Analyzer

• Fast Response (measurements reported each second)
• Requires only 100 watts
• High Precision (sub-ppbv in less than 10 seconds)
• High Sensitivity
• Simple to Use
• Extremely Wide Dynamic Range (to 10 ppmv)
• Ultra-low Drift (new Enhanced Performance model)

The Analyzer has an internal computer (Linux OS) that can store data practically indefinitely on its hard disk drive and send real time data to a data logger via the digital (RS232) or Ethernet outputs. Furthermore, as with all LGR analyzers, the EAA may be controlled remotely via the Internet. This capability allows the user to operate the analyzer using a web browser practically anywhere Internet access is available. This remote access allows bios-level control of the instrument and provides the opportunity to obtain data and to diagnose the instrument operation without being on site.

The analyzer uses LGR’s patented Off-axis ICOS technology, the fourth-generation cavity enhanced absorption technique, which employs a high-finesse optical cavity as the measurement cell. LGR’s technology has many proven advantages over conventional first-generation cavity ringdown spectroscopy (CRDS) techniques. In brief, since the laser beam does not have to be resonantly coupled to the measurement cell (i.e. precise beam alignment is not critical), LGR Analyzers are relatively inexpensive, simple to build, and inherently robust thermally and mechanically. In addition, since LGR’s technology can record reliable absorption spectra over a far wider range of optical depths (absorbance values) compared with CRDS, LGR Analyzers provide measurements over a much wider range of mixing ratios (gas concentrations). Finally, due to the ease and simplicity of recording and quantifying the measured spectra using LGR’s Off-Axis ICOS, LGR Analyzers display the entire absorption spectra to the user in real time allowing for immediate system diagnostics and performance validation.

LGR’s new “Enhanced Performance series” incorporates proprietary internal thermal control for ultra-stable, minimal-drift measurements with unsurpassed precision and accuracy. In brief, LGR’s Economical Ammonia Analyzer provides the high quality data necessary for the most demanding applications including semiconductor process monitoring and atmospheric trace gas monitoring. Moreover, only LGR’s analyzers provide reliable measurements (with guaranteed specs) at extremely high concentrations (to 10,000 ppbv ammonia in air). The Analyzer uses LGR’s patented Off-axis ICOS technology, a fourth-generation cavity enhanced absorption technique. Off-axis ICOS has many advantages over conventional cavity ringdown spectroscopy (CRDS) techniques such as being alignment insensitive, having a much shorter measurement time, and not requiring expensive and power consuming auxiliary components.

• 1-Hz measurements: allow observation of transient and time varying flows
• Accurate measurements over a wide range of concentrations
• High resolution absorption spectra viewable for diagnostics
• Low power: ideal for field work
• New Enhanced Performance model provides lowest drift and highest accuracy

Los Gatos Research’s (LGR’s) Economical Ammonia Analyzer (model EAA-22) provides sensitive measurements of ammonia in ambient air or in industrial process flows with extremely high precision and sensitivity. No longer do you have to spend a lot of money or wait a long time to measure ammonia with high sensitivity – LGR’s Economical Ammonia Analyzer provides measurements every second with ppbv-level precision. In addition, the EAA can report measurements quickly over a very wide range of concentrations.

LGR’s new “Enhanced Performance series” incorporates proprietary internal thermal control for ultra-stable, minimal-drift measurements with unsurpassed precision and accuracy.

The EAA is available in two packaging options to allow users to select the package most suitable for their needs. LGR’s benchtop package includes an embedded keyboard, mouse, and video monitor. LGR’s rackmount package fits in a standard instrumentation rack and requires an external keyboard, mouse, and video monitor. In addition, a suite of options and accessories expands the usability for just about any application.

Accuracy
Total uncertainty <1% of reading
(without calibration)

Detectivity/Precision (1-σ)
better than 2 ppbv (1-second integration time)
better than 0.4 ppbv (25 seconds integration time)

Maximum Drift (Enhanced Performance model)
(15 minute average at STP over 24 hours)
NH3: 0.2 ppbv

Measurement Range (meets all specs)
0 - 10,000 ppbv

Operational Range (external calibration may be required)
0-10000 ppbv
0-10000 ppbv

Response Time (flow time through measurement cell)
1 second (with optional external pump)
10 seconds (with internal pump)

Dimensions (Benchtop Package)
10' H × 38' W × 14' D
(includes embedded video monitor, keyboard, mouse)

Dimensions (Rackmount Package)
Standard model: 8.75' H × 19' W × 24' D
Enhanced Performance model: 14' H × 19' W × 24' D

Weight
Standard models: 65 pounds (30 kg)
Enhanced Performance model: 80 pounds (36 kg)

Ambient Humidity
0-100% RH non-condensing

Operating Temperature
Standard models: 5 – 45 °C
EP model: 0 – 40 °C

Power Requirements
115/230 VAC; 50/60 Hz
Standard models: 100 W
Enhanced Performance model: 250 W
(excluding optional external pump)

Sample Temperature
0–50 °C

Data Storage
Internal Hard Drive

Inlet/Outlet Fittings
3/8', 1/4' Swagelok

Outputs
Digital (RS232), analog, Ethernet