Used Lab Equipment

Multiple purpose capabilities allow you to measure a wide range of analytes.

Features:

• Compact footprint provides a space-saving, convenient system
• Intuitive keyboard with integrated controls and LCD display
• Routine measurements require just a few keystrokes
• Direct measurement of routine absorbance or transmittance data
• Concentration mode for single point standard or factor-based quantitative analysis
• Bidirectional RS-232-C interface

Specifications

• Optical System: Grating based, 1200 lines/mm
• Spectral Bandwidth: <=8nm
• Wavelength Range: 325 to 1100nm
• Wavelength Accuracy: ±2.0nm
• Wavelength: Readout: 20-character, 2-line LCD
• Readout: Absorbance, %Transmittance, Concentration
• Range:
  • -0.1 to +2.5A
  • 0 to 125%T
  • 0 to 1999C
• Accuracy:
  • ±0.003A from 0 to 0.3A
  • ±1% from 0.3 to 2.5A
• Noise (at 500nm): <=0.001A at 0A; ±0.004A at 2A
• Drift: 0.003A/hour
• Stray Radiant Energy: <=0.1%T at 340 and 400nm
• Communication Ports
  • RS-232-C (serial)
  • Centronics-compatible (parallel)
• Dimensions: 13L x 12W x 7 in.H (33 x 30 x 19cm)
• Net Weight: 10 lb. (4.5kg)

Handle a wide range of routine and complex applications—perform simple absorbance measurements, determine sample concentrations or run a rate analysis. 

Specifications:

• Optical System: Split-Beam

• Cell-Holder: 8-position, Microprocessor-Controlled

• Communication Ports: RS-232-C (Serial) / Centronics-Compatible (Parallel)

• Wavelength Range: 200 - 1100nm

• Wavelength Accuracy: ±1nm

• Wavelength Precision: ±0.5nm (ASTM E 275–83)

• Photometric Readout: Absorbance, %Transmittance and Concentration

• Photometric Range: -0.1 to +3.0A; 0 to 125%T; 0.001 to 9999

• Photometric Accuracy: ±0.003A from 0 to 0.3A, ±1% of Reading from 0.3 to 2A, ±2% of Reading from 2 to 3A

• Photometric Drift: 0.002A/hour at 340nm

Spectronic 21 Digital Model with UV Capabilities features linear digital readouts in % T, A, and concentration; push-button decimal selection; and an RS-232 interface port. Three-position sensitivity switch and the 100% T/zero A control let you select desired instrument gain setting. Digital display alerts you to out-of-range conditions.

Spectrophotometer includes a universal test tube/cuvette holder (accepts 10- to 26-mm pathlength test tubes or 1- to 10-mm pathlength rectangular cuvettes), twelve 10-mm pathlength test tube cuvettes, spare tungsten lamp, occluder block, operating manual, dust cover, and 3-ft cord with U.S. standard plug.

Specifications:

• Bandwidth: 10 nm
• Wavelength range: 200 to 1000 nm
• Wavelength accuracy: >2 nm at 254, 365, and 546 nm
• Photometric range: Transmittance: 00.0 to 100.0% T
• Absorbance: 0.000 to 1.990 A
• Concentration: 000 to 1990 C
• Detector: Solid-state silicon
• Output: 0 to 1.0 VDC; RS-232
• Stray light: 0.05%T at 340 nm
• Model: SPECTRONIC 21
• Source lamp: Tungsten/deuterium
• Display: 3-1/2-digit LED, 7/16" H