Detector Compatibility

• Silicon
• Silicon Carbide
• Germanium
• Indium Gallium Arsenide
• Photomultiplier
• Vacuum Photodiodes

Designed for low light level detection, current resolution is typically 1 picoampere. Output shown on a 31/2-digit LCD display is also available at a recorder output connector. An adjustable offset current permits adjustment to zero ambient light or leakage current effects.

Visible Fibre Optic Detector

A sensitive silicon planar photodiode is the heart of this photometric sensor. Used in the photovoltaic mode and connected to WPI's wide range digital picoammeter, VISD lets the user measure visible light with exquisite sensitivity over a wide range of light intensity. With a sensitivity of 0.5 microAmperes per microWatt of incident radiation, the spectral range extends from 400 to over 900 nm.

UV Fibre Optic Detector

At the heart of this new fibre optic ultraviolet sensor is a new UV-sensitive photodiode. As shown in its spectral response graph, it has virtually no response to visible light ("solar blind") - no need to use a visible light cut-off filter. Attach an optical fibre (UV enhanced, such as WPI's FO series cables with SMA connectors) to the source or view the UV light directly through the SMA fibre optic fitting. Connect the output BNC connector directly to a sensitive current-to-voltage amplifier such as WPI's Photodetector Amplifier PDA1.