LIBRA S2 COLORIMETER MAINS ONLY. Supplied with mains transformer, 8 gelatin filters, starter pack of cuvettes and instruction manual; Absorbance Range  -0.3 -1.99A or 0-199% transmission; Wavelength range 400 - 700 nm using 8 x 40 nm bandwidth

Specification	Data
Type	Visible
Wavelength Range	440 - 680nm
Wavelength Accuracy (+/-)	2nm
Wavelength Reproducibility (+/-)	1nm
Lamp Source	Tungsten Halogen
Beam	Single Beam
Optical System	Gelatin Filters
Bandwidth	40nm
Detector	Diode
Photometric Range	-0.3 to 1.99A
Stray Light	<1%T at filter wavelength
Zero Stability	n/a
Baseline Flatness	n/a
Measurement Type	Fixed Wavelength (Abs/%T), kinetics
Cell Compatibility	Cuvette 10mm
Other Sample Containers	Test Tube* (10, 12, 16mm)
Cell Holder	Single Cell
Accessory Options	Rechargeable Battery* (S2B)
Temperature Control	None
Method Storage	n/a
Regulatory Compliance	CE
Printer	External via Export*, Chart Recorder*
Data Output	Print*, Export to PC*
Display	LCD
Export/ Data Storage	Serial Cable
Data Interface	Serial
Languages	English, Manuals in French, German, Italian and Spanish
Power Requirement	110-220V, 50/60Hz, 20VA
Weight	0.6 Kg (1.2lb)
Dimensions (WxDxH)	15 x 18 x 6cm (5.9 x 7.1 x 2.4 inches)
Certification	CE
Noise	n/a
Photometric Accuracy	+/- 0.02A at 1A
Photometric Reproducibility
Scan Speed	n/a
Spectral Scanning	No

Description
The Libra S2 is a small, robust, easy to use instrument that has been designed with both the student and field user in mind. It is ideal for teaching principles of science and analysis in schools and colleges, as well as being rugged enough for measurements in hot or demanding environments such as QC measurements in industrial processes or remote location health clinics where simple diagnostic tests need to be made.

The samples can be measured in either standard or semi micro 10mm pathlength cuvettes or in 16mm diameter test tubes (adapters for 10/12 mm test tubes are available). The instrument surface is designed for ease of cleaning and decontamination. Rechargeable NiMH batteries are included in the Libra S2B and they will operate for almost a month on a single charge to provide complete portability.

The instrument measures in Absorbance and % Transmission mode as well as in simple kinetics, enabling changes in Absorbance over time and reaction rates to be determined (readings are taken approx. every second). It may be used to cover the 400 � 700 nm wavelength range as it has an integral, colour coded rotating wheel containing filters at 440, 470, 490, 520, 550, 580, 590 and 680nm. These are made from coloured gelatin and are encased in glass, so that the instrument can be used in �tropical� conditions. A filter is selected by moving the wheel until the required wavelength is displayed in the window above the cell compartment.

The instrument may be linked via a serial lead to either a serial printer for hardcopy output or to a PC for download of results to spreadsheet. It has an analogue output, and may also be connected to a chart recorder using a standard 2 x 4 mm socket to output absorbance-time data when in kinetics mode.