The FMS 1+ modulated chlorophyll fluorimeter is a versatile pulse-modulated instrument with mains power supply for laboratory/near-field use. It is suitable for non-invasive sampling of chlorophyll fluorescence under natural or artificial light conditions and may be interfaced with our range of oxygen electrode chambers for simultaneous oxygen measurements.
The FMS 1+ modulated chlorophyll fluorimeter consists of a control unit housing all of the electronics, optics and light sources necessary to derive most common chlorophyll fluorescence parameters. These are optically linked to the sample by a statistically randomised fibre-optic cable that is suitable for insertion into a range of sample containers such as oxygen electrode chambers, older infra-red gas analysis (IRGAS) chambers, Petri dishes and microtitre plates.
The system may be operated in several different modes: serial connection to a Windows® PC enables real-time instrument control and data presentation.
Captured data is simultaneously presented as a real-time chart recorder emulation and parameters-only format for easy identification of key experimental events. This PC mode of operation is suitable for development of complex protocols which may be programmed into the instrument using the simple drag and drop editor to generate user-defined scripts. These scripts automate the execution of experiments, allowing complex protocols involving many control events to be operated with the same ease as single control event measurement such as . Once programmed, the FMS 1+ chlorophyll fluorimeter can be operated as a stand-alone fluorimeter inside the laboratory or outside (via connection to an optional external battery). All measurement data and calculated parameters are saved to integral protected memory. The unit can store up to six experimental protocols, any one of which may be accessed and executed using the built-in menu system. When data collection is complete the results can be downloaded to the Windows® software for full analysis.
All of the light sources required for modulated measurement of common chlorophyll fluorescence parameters are self-contained within the instrument.
- 594nm amber modulating beam with 4-step frequency control. (Optional 470 nm blue LED)
- Dual-purpose ultra-bright LED light source providing actinic light (0 µmol m-2 s-1 – >4,000 µmol m-2 s-1 in 50 steps) and saturating pulse (0 µmol m-2 s-1 – >13,000 µmol m-2 s-1 at the sample surface in 100 steps)
- 735nm far-red LED source for preferential PSI excitation allowing accurate determination of the parameter.