STS SMF2 Portable Spectrofluorimeter

The SMF2 portable spectrofluorimeter allows users to make on site fluoresecence measurements with a full spectral output. The instrument is designed to sample both liquids and surfaces and due to it's compact nature and internal battery can be used anywhere for instant measurement and results analysis.

STS SMF2 Portable Spectrofluorimeter

The SMF 2-LSP (Liquid Sampling Probe) uses conventional optical geometry to measure the fluorescence of solutions in standard 1 cm cells. However, the compact size and battery based operation allow the instrument to be used in the field to make measurements that, until now, required large laboratory spectrometers.
This portability then allows the user to make measurements at the point where the sample is taken and hence take immediate action on the results.

Applications of the SMF 2 LSP include, for example:
-measurement of tryptophan and other biomarkers in river and water treatment plant studies
-measurement of industrial pollutants in rivers and sewage works
-measurement of materials swabbed from surfaces in industrial hygiene studies
-fluorescent tracer measurement
-identification of unknown materials in landfills and fly tipping

The SMF 2 - SMP (Surface Monitoring Probe) is a direct reading spectrofluorimeter which uses short wavelength UV to excite materials of interest on surfaces and detects the resulting fluorescence. The materials efficiently detected by this technique include all fluorescent dyes, which may be incorporated in products as diverse as inks, polymers, oil and water, paper and domestic products, as well as naturally occurring fluorescent materials such as some pharmaceuticals and environmental pollutants.

Applications of the SMF 2 SMP include, for example:
-Simulation of toxic materials
-Security ink research
-Coating identification and measurement
-Industrial hygiene monitoring
-Cleaning monitoring
-Tracer studies

The ability to measure directly on surfaces makes the SMF 2 - SMP an optimum approach for many tasks and its portability enables the measurements to be taken on site, therefore avoiding delays caused by transit of samples to laboratory.
We are proud to announce that the SMF 2-LSP received the Silver Award from the European Environmental Press for innovative environmental technology at Pollutec 2003.

Technical Information

Spectrometer Functions

Used to view more of the higher or lower wavelengths
Used to increase/decrease the vertical range and increase/decrease the wavelength.
The SMF2 can display up to 2 spectra at the same time.
Spectra are always acquired to Spectrum 1. Saved spectra are always recalled to Spectrum 2. the user may scroll between the 1st, 2nd or both spectrum.
Point of Interest (POI)
The user may select a point of interest on the spectrum, the wavelength and counts at the cursor position are displayed at the bottom of the screen.
Regions of Interest (ROIxx)
Up to 99 regions of interest can be defined and saved in non-volatile memory for future use. Up to four of these can be displayed on the screen at any one time.

Main Menu

Background Subtraction
With ‘Background Subtraction’ set to ‘Enabled’ the background spectrum (no flash) captured immediately before the main spectrum (with Flash), is subtracted from the main spectrum.

Recall Spectrum
The recalled spectrum will be read into ‘Spectrum 2’. If previously only spectrum  1 was displayed on the screen, then both spectrum 1 and spectrum 2 will be displayed when you return to the spectrum display screen.

The word ‘On’, Dim’ or ‘Timed’ will be displayed to the right of the option to indicate the currently selected option.

The word ‘On’ or ‘Off’ will be displayed to the right of the option to indicate the current state of the Calibration mode. With Calibration turned on, a previously defined polynomial will be used to define the vertical scaling on the spectrum.
The polynomial can be defined in the ‘SMF2 Manager’ application running on a PC and connected to the instrument via a USB cable. In addition to the polynomial coefficients, the units of measurement can be defined e.g. ug/ml’. This will be displayed at the top left of the spectrum display when ‘Calibration’ is turned on.

Adjust Brightness
A number will be displayed to the right of the option indicating the current brightness of the backlight.

Check Battery
The battery voltage and a bar graph indicating the current charge in the battery are displayed. As the battery voltage falls rapidly when it becomes exhausted, the bar graph is a better indication than the voltage of how much life there is left in the battery.

Set Colours
Many of the colours used in the instrument are customisable. Press the ‘Select’ key to display a list of the current colour settings.

Save Configuration
Any settings selected in other menu options take effect immediately, but will be lost when the instrument is switched off.
To keep these settings as the default the next time the instrument is switched on, select this option. In addition to the settings defined in the menu, the zoom factor, vertical scaling and calibration coefficients are also saved.

Spectrum Display
Press Select to return to displaying the spectrum.

Saving a Spectrum
When saving a default file name will be displayed at the bottom of the screen. On the first occasion, the filename will be ‘Unknown-00’ The filename may be edited using the cursor keys.
The next time you press ‘Save’ to save a spectrum, the suggested filename will be made up of the first 8 characters of your previous filename followed by an incrementing number. For example, if you had left the filename as ‘Unknown-00’ the suggested filename would be ‘Unknown-02’ If you had changed the filename to ‘Sample’, the suggested filename would be ‘Sample-01’.

Power Management
The instrument uses six NiMH C cells mounted internally which will provide up to 8 hours of continuous use. It can also be powered from the provided 12v 2.5A wall cube.  If the instrument is connected via a wall cube, an animated icon will be displayed. The battery takes approximately 4 hours to charge a set of full discharged batteries.

Serial Interfaces
The instrument has a USB interface for connecting to a PC, and an RS232 interface for connecting to a data logger.

For more information :

Call us  on +44 (0) 1344 483563
or email to

Safe Training Systems ltd – Holly House, Maidenhead Road, Wokingham, Berkshire RG40 5RR Tel: +44 (0)1344 483563 Email: Web:
 Registered in England No.2654899 VAT no. GB572853808

N.B. The information contained in this entry is provided by the above supplier, and does not necessarily reflect the views and opinions of the publisher