Model 412 NIR Process Analyzer

The Guided Wave Model 412 process Analyzer offers remote multi-channel near-infrared (NIR) or visible (Vis) spectroscopic scanning and analysis. Essentially a smart chemical sensor, the Model 412 provides exceptional signal-to-noise, excellent wavelength stability, NIST traceable wavelength calibration, dual-beam optics and built-in diagnostics. Process operators, engineers, and researchers will appreciate the Model 412's ability to monitor up to 12 process streams (or points within a stream) with accuracy, repeatability, and reliability.

Complete Analyzer System

The Model 412 is the core of a comprehensive process analyzer system that includes the spectrometer; one or more NIR probes, fiber optic cables, and intelligent scanning-and-analysis software. The Model 412 uses near-infrared radiation to collect spectral data from liquids, gases, slurries, glass, and polymer-based films. The spectral data are interpreted by the analyzer system's software, to determine the composition and/or physical characteristics of the material.

True Multiplexing

In remote spectroscopy the analyzer transmits radiation to one or more probes installed directly in your process reactors or pipes. Readings can he made at any time, providing real-time process information. Up to twelve channels per analyzer are avaialble via our patented shutter system. The Guided Wave Model 412 is designed to be used with Guided Wave’s single-strand fiber optic cable. This patented cable contains a high-efficiency glass fiber, permitting transmission distances of up to several hundred meters.

Research-Grade Signal-to-Noise Ratio

The Model 412's dual-beam design, coupled with its high output scanning grating, puts more light in the fiber; providing the highest available signal-to-noise ratio. Every Model 412 also provides excellent wavelength accuracy (NIST traceable) and superb wavelength repeatability.

Designed for On-Line Processes

The Guided Wave Model 412 is suitable for on-line analyses of most processes and process streams. Three versions of the Model 412 are available. The Vis version operates at 380 - 1070 nm and uses a silicon detector (Si). Thc NIR version uses an Indium-Gallium-Arsenide (InGaAs) detector and operates at 800-1700 nm. The extended, or xNIR, version uses an extended-range InGaAs detector and operates at 1000-2100 nm.

Here are just a few of the many applications for which our customers rely on the Model 412 every day:

On-line analyses of polyols: OH and acid number
On-line analyses of polymers: reaction endpoint, co-polymer ratio
On-line analyses of films: color; thickness, %T, %R
On-line measurement of moisture content
On-line analyses of refinery products
On-line analyses of vinyls: solvent composition
Process research and development

Model	412 VIS	412 NIR standard	412 NIR extended
Wavelength Range, nm (rated)	380 - 1070	800 - 1700	1000 - 2100
Wavelength Range, nm (optimal)	400 - 1000	900 - 1600	1050 - 2000
Wavelength Accuracy, nm	±0.28	±0.20	±0.20
Wavelength Repeat., nm	±0.02	±0.02	±0.02
Wavelength Stability (rms/24hrs)	±0.05	±0.05	±0.05
Minimum Step Size, nm	0.2	0.2	0.2
Spectral Resolution, nm	3.2	6.8	6.8
Photometric rms Noise	< 20 µAU	< 13 µAU	< 26 µAU
Photometric (Baseline) Stability (rms/24hrs)	< 1 mAU	< 1 mAU	< 1 mAU
Dynamic Range (Mid Range)	4.0 decades	4.0 decades	4.0 decades
Optical Connections	SMA 905; 500 µm Diameter Single Strand Fiber Optic Cable
Data Communications	RS422, RS-232 (DB9 Null Modem Cable), or optical fiber modem
Dimensions	30” (w) x 17.3” (d) x 41.3” (h) [76 cm x 44 cm x 105 cm]
Weight	200 lbs [91 kg]
Power	1500 W, 110/220 Vac, 50/60 Hz
Climate (Temperature/Humidity)	0C to 40°C Shaded 0-90% non-condensing

Included as Standard Equipment

Drivers for Opto-22 4-20 mA I/O and discrete (0-5V) I/O
Modbus communication protocol, embedded
Optical jumper cables and tool kit with torque wrench
Method Maker interface for use with (Unscrambler^®)
Temperature controlled NEMA 4 Enclosure

Software Options

Camo Unscrambler^® chemometrics software for Windows^®
Model Studio interface to Unscramble^®
CLASS-PA or SpectrOn process analysis software.

Enclosure Options

The Guided Wave Model 412 comes installed with an air-cooled internal climate control system for General Purpose Environments. This instrument can also be packaged for hazardous environments. These options include Class I Division 2 groups C & D and CENELEC EEx pdem [ib] II C T4.

Instrument Control Unit (Computer)

The Model 412 must be used with an ICU (Instrument Control Unit, a PC-compatible computer) that meets or exceeds the following specification:500 MHz or better CPU; 512M RAM, DVD/CD-ROM, open slot for communication card, Windows XP or Vista OS.

Operating Environment

Internal operating temperature settable between 30 and 40°C controlled to ± 1°C of set point
External (ambient) temperature 0-40°C, shaded location
Temperature limits for constant operation ± 10°C
External humidity 0-90% (non-condensing)

Product Brochure

Calibration Transfer