PHOSPHOR DETECTION AND MEASUREMENT DEVICE

Phosphorescence is the physical property whereby a material if excited by the correct wavelength of energy produces an afterglow after the excitation source has been removed, normally at a longer Phosphor Meter (Sometimes referred to as PM102D) wavelength.

The persistence or time, intensity and colour of the afterglow will be specific to a particular phosphor and, may or may not be visible to the human eye. It will also be a function of ambient temperature, the amount of material and the energy level of excitation.

Materials which exhibit a wavelength conversion yet do not display afterglow are described as fluorescent. Some phosphors exhibit very brief afterglow often resulting in their incorrect identification as fluoresces.

The Synt Phosphormeter provides rapid, portable and reliable measurement of the intensity decay of phosphorescent materials.

Security Threads: Phosphorescent threads are embedded within banknotes or documents as a security feature. These threads glow under UV light, making them easily detectable and verifying the authenticity of the document.

Security Labels and Seals Phosphorescent inks are used in printing security labels or seals for authentication purposes. These labels can be affixed to products or documents and are often checked using UV light to verify their authenticity.

Anti-counterfeiting Marks: Phosphorescent inks are used to print specific marks or patterns on valuable documents, such as certificates or tickets, which are invisible under normal light but become visible under UV light. This makes it easy to distinguish genuine documents from counterfeits.

Passports and IDs: Phosphorescent materials are incorporated into the printing of passports, IDs, and visas as a security measure. Certain elements of these documents, such as national emblems or microtext, may be printed using phosphorescent inks to enhance security.

Currency Notes: Some currencies incorporate phosphorescent features as a security measure. For example, certain denominations of banknotes may include phosphorescent symbols or patterns that are visible only under UV light.

The meter reports relative strength of luminous "afterglow" after a predetermined period. By using the adjustable gain control to set a 100% level (or other arbitrary levels) the meter can provide comparisons between a reference standard and unknown samples.

The provision of pre-selected time base adjustment allows the relative decay curve to be plotted for a single sample, thus providing additional information about sample type and performance.

The Synt Phosphormeter uses a precision light source to activate the sample with a reproducible light pulse. Selectable filters in the sample locator tray enable selection of longwave or short-wave excitation.

The detector cell is fitted with an infra red stop filter to illuminate stray IR effects. This holder also permits insertion of coloured gelatine filters for improved discrimination of phosphorescent colour, if required.

The Phosphormeter has been manufactured for many years. The unit itself has been known as the Phosphormeter, Phosphor Meter, Phosphor detection and measurement device, PM102D etc.  and has been continually manufactured albeit by different companies over the years such as Ramley, UV Systems Ltd, Wedeco UV systems, Daro UV systems and now Synt Group Ltd. We have historical links with all of these companies and such can offer historical information and continued support with your meter as well as many years experience in the manufacture of the Phosphormeter.