Agilent 1260 Series ELSD Model G4218A Evaporative Light Scattering DetectorThe Agilent 1260 Infinity Evaporative Light Scattering Detector (Figure 1) is designed to detect compounds in the eluent from high performance liquid chromatography (HPLC), micro-HPLC, gel permeation chromatography (GPC) or counter current chromatography (CCC). It is capable of monitoring eluent flow rates from 5 µl/min to 5 ml/min. Evaporative light scattering detection is a universal technique which can detect any non-volatile analyte. Detection does not depend on the absorbtion of radiation and is not affected by the absorbtion characteristics of the solvent; thus solvents which absorb UV radiation can be used.The detector is controlled via the keypad and digital display on the front panel. Alternatively, the system can be controlled by an external computer using the RS-232 port. The output can be sent to a recorder or data station. The detector includes a nebulizer, evaporation tube and detector head. The evaporation tube is located in an oven to assist in the evaporation of the solvent.ELSD Performance SpecificationsDetection High Sensitivity PhotomultiplierLight Source Selected High Efficiency Blue LEDTemperature Range Ambient to 100 oCGas Flow Control Manual and computer controlled nebulization gasflow and auxiliary gas flow.Gas Consumption Less than 4 l/min for the Large Flow Nebulizer, lessthan 3 l/min for all other nebulizers.Gas pressure 3.5 bar (51 psi) typical, min. 3 bar (44 psi) to max.4.5 bar (67 psi)Eluent Flow Rate Micro Flow Nebulizer: 5 µl/min to 50 µl/minSemi Micro Flow Nebulizer: 40 µl/min to 1 ml/minStandard Flow Nebulizer: 500 µl/min to 2 ml/minLarge Flow Nebulizer: 1.5 to 5 ml/minRapid Resolution Nebulizer: 0.2 to 1.4 ml/minInstrument Control Microprocessor with standalone manual keypad orWindows based PC control (see specs for your instrument control software)Operating Parameters Control Liquid Crystal Digital PanelSignal Drift* Less than 1 mV/hSignal Noise* < ± 1 mVSignal Output 0-1000 mV (Analog)RS-232 (Digital)Inputs Remote Autozero (Contact Closure or TTL Signal)Remote Powerdown Mode (Contact Closure or TTL Signal)Power Down Mode General, Standby, CleaningZero Control Manual Auto Zero and Remote Auto ZeroInterface RS-232 I/O Serial OutputPower 100 V / 2.1 A, 115 V/60 Hz, 1.8 A or 230V/50 Hz, 1.7 ADimensions 250 mm (10″) W x 450 mm (18″) H x 550mm (22″) DWeight 18.5 kg (40 lb.)