Programmable Detectors

Model 201

The Model 201 detector is a time-programmable, variable wavelength UV/Vis detector. It operates in single-wavelength mode in either the UV range or the visible range.

High sensitivity for demanding applications

Programmable wavelength capability with a wide absorbance range from 0.0005 to 3.0 AUFS gives you optimum selectivity and high sensitivity.

Reduce setup time

Easy to program and operate, the front-panel display guides you through the setup of time-based programs, run parameters, and output settings.

Easy access and maintenance

Pre-aligned lamps and flow cell, easily accessible, assure quick maintenance and easy replacement of parts.

Complete line of flow cells

Standard Type 316 stainless steel; optional chemically inert, metal-free Kel-F®*; and optional micro flow cells are available for optimal detection. Cells are also available for CE and high-pressure applications.

Model 525

The Model 525 is a full-featured dual-wavelength programmable detector that utilizes the same optical design as the Model 201. In addition, the Model 525 offers spectral scanning, multiple method file storage, queue feature for file linking, and more.

Enhanced detection ability with Model 525

By simultaneously monitoring two wavelengths, you increase detection capability for different compound types. To check purity, the detector can be used to monitor absorbance at one wavelength and simultaneously ratio or subtract the absorbance value at another wavelength.

More than just a detector, the Model 525 is also a spectrophotometer

When separating unknown compounds, use the Model 525 scan feature to monitor a wavelength range. Identify and zero in on important peaks and scan the eluting compound for its spectral characteristics. The Model 525 can store as many as 10 spectra from a single run! This feature simplifies your method development.

* Kel-F is a registered trademark of 3M Company

PRODUCT FEATURES

Optimized motor control algorithm
High-speed motor drive
Real-time spectra
Display lMAX
DevelopFile^TM
Six method files
Automatic lamp startup/shutdown
Programmable autozero
Autoscan

Wide variety of flow cell options

A wide variety of cell options is available for all applications. Analytical, micro, semi-prep, prep, and inert/bio flow cells are offered for LC. The high pressure (7000 psi) flow cell is ideal for SFC and LC-MS. An on-column cell for CE and SFC uses a ball lens to focus the light beam for increased sensitivity. A cuvette holder converts the detector into a spectrophotometer and makes fixed wavelength and scanning absorbance measurements accurate and reliable. All flow cells are pre-aligned for fast, simple installation and exchange.

SPECIFICATIONS

Optical design

Concave holographic grating monochromator, with dual beam optics; pre-aligned, front-mounted lamps and flow cell

Noise

<±1.0 x 10-5 AU @254 nm, 1.0 s rise time; <±2.5 x 10-5 AU @254 and 280 nm, 1.0 s rise time, dual-wavelength mode (525 only)

Drift

<2 x 10-4 AU/hr. after warm-up @ 254 nm

Wavelength range

Deuterium lamp:	190-365 nm (Model 525) 190-380 nm (Model 201)
Tungsten lamp:	366-800 nm
Dual wavelength:	190-450* nm or 366-800 nm (525)

* Second-order effects may be observed above 360 nm.

Wavelength accuracy

±1.0 nm

Wavelength precision

±1.0 nm

Spectral bandwidth

6 nm

Absorbance range

0.0005-3.0 AUFS

Absorbance linearity

>1% to 2.0 AU @254 nm

Communications

Remote inputs

Run, Stop, Zero

Outputs

Ready, Accessory Relay

Analog outputs

2 outputs, range-selectable over entire absorbance range

Ambient environment

10 to 40° C; 5% to 95% relative humidity, noncondensing

* DevelopFile is a trademark of Linear Instruments Corporation.