Pharmaceutical Instruments

Gilson 155 UV/VIS Detector

Gilson 155 UV/VIS Detector


Gilson's 15X Series of UV/VIS Detectors deliver versatile, rugged detection for HPLC. The optical design optimizes sample detection at wavelengths from 190 to 700 nm.

Interchangeable flow cell design accommodates capillary to preparative HPLC applications

The detectors have a sensitivity range of 0.001 to 2.0 AUFS (Absorbance Units, Full Scale)
Controlled via Gilson’s TRILUTION® LC Software or choose stand-alone keypad control with the 151 and 155 models
Stores up to ten detection methods
Choose from the following modes to specify detection conditions and basic operating parameters:

  • single wavelength
  • file
  • status
  • setup
  • dual wavelength (155 and 156)
  • scan wavelength (155 and 156)


Manufacturing Standards Meets applicable safety and EMC certification standards; UL and CE certified
Autozero Range Suppresses up to 1.0 AU with 5 mm flow cell installed
Communication Interface Event and autozero inputs; remote contact closure can be activated by other instruments or the computer. Three channels output data to a recorder.
Drift After 1 hour at constant temperature: 3.0 x 10-4 AU/hr
Environmental Conditions Indoor use
Altitude: up to 2000 m
Temperature range: 5–40°C
Air pressure: 75–105 kPa
Pollution degree: 1 or 2, in accordance with IEC 66
Humidity: Maximum relative humidity 80% for temperatures up to 31°C, decreasing linearly to 50% relative humidity at 40°C
Flow Cell Assemblies The following quartz flow cells are available:

Flow Cell Path (mm) Volume (µL) psi
Analytical 5 12 500
Microbore 2 1.6 500
Preparative 0.2 0.7 500
Preparative 0.05` 0.16 500
Flow Sensitivity 4.0 x 10-4 AU for flow step of 2.0 mL/min to 0.5 mL/min with methanol
Front Panel Four-line display shows modes, parameters, commands, and data. Six soft keys and HELP, ESC, CLEAR, ENTER, numeric, and arrow hard keys (151/155 only). LED indicator lights for POWER, UV,VIS, REMOTE, and ERROR. LAMP ON/OFF hard key.
Lamps UV lamp: Deuterium, warranted for 750 hours or 180 days
Visible lamp: Tungsten/halogen, warranted for 500 hours
Lamp Warmup Time One hour maximum
Linearity 1%, when value is within sensitivity range of 0.001 to 2.0 AU
Monochromator Dual beam, stepper motor-driven
• Range: 190–700 nm
• Spectral bandwidth: 9 nm
• Setting accuracy: ±2 nm
• Setting precision: ±0.2 nm
Noise with Air Block Installed 220 nm, short term, peak to peak, 2.0 x 10-5 AU/cm; 254 nm, short term, peak to peak, 2.0 x 10-5 AU/cm; 350 nm, short term, peak to peak, 10.0 x 10-5 AU/cm; 415 nm, short term, peak to peak, 8.0 x 10-5 AU/cm; 520 nm, short term, peak to peak, 6.0 x 10-5 AU/cm; 650 nm, short term, peak to peak, 4.0 x 10-5 AU/cm
Peak Width 0 and 4 to 99 seconds for single- or scan-wavelength mode; 4 to 99 seconds for dual-wavelength mode
Power Requirements Frequency: 50–60 Hz
Voltage: 90–120 or 220–240V; mains voltage fluctuations not to exceed ±10% of the nominal voltage
Current rating: 1.0A for 90–120V, or 0.5A for 220–240V
Online switching regulation of line input from 80 to 260V AC
Sensitivity Range 0.001 to 2.0 AU. Sensitivity is adjustable in increments of 0.001 AU
Software Control Via GSIOC or RS-232. You can issue commands to do the following:
• Select all detection parameters
• Program parameter changes during run to optimize detection
• Send digital detector output
Static RI Sensitivity Methanol versus cyclohexane at 270 nm: 5.0 x 10-3 AU
Temperature Sensitivity 3.0 x 10-4/°C for temperature change from 21° to 24°C
Dimensions (w x d x h) 26.5 x 43.5 x 15.6 cm (10.4 x 17.1 x 6.2 in.)
Weight 8.6 kg (19 lbs.)








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