Pharmaceutical Instruments

Gilson prepELS™ II Detector

Gilson prepELS™ II Detector

Gilson’s prepELS™ II Detector can be added as the primary, or as an additional detector to any Gilson preparative or analytical system, or to any other HPLC system on the market. The detector can accommodate flow rates up to 75 mL/min with simplistic, robust splitting packages. No other ELS detector available can accommodate sample masses from nanograms up to 5 mg without driving the detector signal off-scale.

The prepELS II Detector has unsurpassed capabilities on the analytical scale with the ability to detect analyte down to a low-nanogram level. A unique filtering technology allows for the removal of baseline noise without affecting peak height or shape. Thermo-Split™ Technology gives users the ability to optimize the detector for any mobile phase or flow rate by precisely controlling temperatures and providing a gentle vapor split.

Patented Thermo-Split™ Technology allows optimization per sample for any mobile phase or flow rate by precisely controlling the spray chamber and drift tube temperatureStraight drift tube design allows for easy cleaning and maintenance versus diffucult coil shape drift tubesRevolutionary filtering capabilities allow for effective baseline noise reduction without affecting peak height or shapeTwo separate gain settings for prep and analytical applications: low-gain setting for detecting prep samples up to 5 mg depending on analyte & normal-gain setting for detecting analytical sample amounts down to 25 ngEasy-to-use, low maintenance splitting packages: static y-splitting packages for flow rates up to 75 mL/min to optimize flow rates with virtually no maintenanceUnique calibration procedure ensures that multiple ELS detectors give the same readingLaser diode light source maintains robust signal strength over the entire 10,000 hour lifetime to ensure consistent, reproducible results



Output Signal

0 – 10mV DC or 0 – 5V DC, dependent on full-scale and calibration settings

Communication Interface

RS-232 or analog output


Hermetically-sealed photo diode/operational amplifier

Light Source

670 nM laser diode, < 5 mW

Liquid Contact Materials

Stainless steel, glass, anodized aluminum and Teflon®

Power Requirements

Frequency: 50 – 60 Hz

Voltage: 120 or 240V AC

Watts: 600

Gas Consumption

Approximately 2.5 SLPM

Gas Requirement

65 ± 5 psi Argon or Nitrogen

Nebulization Chamber Temperature

0° – 70°C

Evaporative Zone Temperature

Ambient – 120°C

Operating Conditions

Intended for indoor use

15° – 30°C (60° – 85°F)

<90% relative humidity, non-condensing

Display Panel

2-line, 20-character per line VFD

Front Panel

Four multi-function keys

Manufacturing Standards

Meets applicable Safety and EMC certification standards; CE certified

Dimensions (w x d x h)

25 x 46 x 29 cm (9.8 x 18 x 11.5 in)


11.4 kg (25 lbs)








LC-MS Systems

HPLC Systems



Biolab A/S
Sindalsvej 29
8240 Risskkov
Telefon: 86 21 28 66