Thermo / Applied Biosystems 2900-0517 Monochromator
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Thermo / Applied Biosystems 2900-0517 Monochromator

This Thermo / Applied Biosystems is the Applied Biosystems 785A Programmable Variable Wavelength Detector Monochromator.

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Stock # 51517-11
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Thermo / Applied Biosystems 785A Programmable Variable Wavelength Detector

  • LC Programmable Wavelength Detector
  • Compact, User-Friendly Design
  • Front Panel or Remote Operation
  • Low Noise, Accurate, Stable Platform
  • Built-in Self Diagnostics


The ABI 785A is a LC variable wavelength detector that can operate from 190-700nm. Nitrogen purge hook-up is present for desired operation below 200nm. This instrument is fully programmable from the front-panel user interface, or it can be controlled remotely from the RS232 port. The workhorse of the industry, both Applied Biosystems (ABI) and Perkin Elmer (PE) sold the 785A as part of their product line-up. PE has many accessories/parts listed and available on their website (as well as the manual).

A and B Serial Ports
Remote/Test Port
Comp. Out
Recorder Out
Several Relay Connections

Power: 100-240VAC

Important Notice: Please note that any additional items included with this equipment such as accessories, manuals, cables, calibration data, software, etc. are specifically listed in the above stock item description and/or displayed in the photos of the equipment. Please contact one of our Customer Support Specialists if you have any questions about what is included with this equipment or if you require any additional information.

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Wavelength Range190 - 700 nm
Wavelength Accuracy± 1 nm
Wavelength Reproducibility± 0.5 nm
Bandwidth5 nm
Absorbance Range 0.0005 to 3.000 AUFS, in 0.0001 increments from 0.0005 to 0. 1, and 0.01 increments above 0.1 AUFS
Noise (210-280 nm, 1 sec rise time, standard 12 ul flowcell)< ± 1 X 10-5 AU
Program Storage8 Programs / 32 Events Each
OpticsDual Beam
Recorder Output10 mV Full Scale for any Selected Range
Drift<1 x 10-4 AU/hour, after Warm-Up
Operation Below 200 nmN2 Purge Provision
Noise FilterDigitally controlled active with rise times selectable from 0.02 to 5.0 seconds 8 steps
Programmable FunctionsTime, wavelength, range, rise time, auto zero, relay closures, program number, number of injections, shutdown procedure (program execution via run table)
ScanStopped flow scan, scan speed selectable from 0.2 to 1.0 nm/sec
Flowcell Backpressure500 psi
Self DiagnosticsSelf-check routine upon demand. Complete self-check routine performed upon power-up. Continuous monitoring of power supply condition, lamp status, fan operation, and leak sensor
Control Outputs4 SPDT relays, 1 A/48 V (max); relays retain state even with power off

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Item Images

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Applied Biosystems 785A Programmable Variable Wavelength Detector
Applied Biosystems 785A Programmable Variable Wavelength Detector
Applied Biosystems 785A Programmable Variable Wavelength Detector
Applied Biosystems 785A Programmable Variable Wavelength Detector
Applied Biosystems 785A Programmable Variable Wavelength Detector

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Manuals, Datasheets, Drivers, Links

Applied Biosystems 785A Manual (pdf) 
Link to Thermo / Applied Biosystems Website 

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