The PMA detector is a single photon sensitive, fully integrated, fast time response and low noise photon sensor from PicoQuant. The PMA integrates a fast photomultiplier tube (PMT), a high voltage power supply and a pre-amplifier. For selected models thermoelectric cooling and automatic overload protection is available as an option.

These devices are built in a gold plated iron or nickel coated aluminum housing to achieve high level of RF and magnetic shielding and protection against the interference with other devices. The built in pre-amplifier is specially targeted at timing sensitive applications such as Time-Correlated Single Photon Counting (TCSPC). The PMA is available in a positive or negative polarity output to fit various timing electronics.

Various photocathodes can be incorporated into the PMA to meet the user's needs. Four different cathode versions are available. A blue sensitive, low dark count version covers the spectral range from 185 to 650 nm. The standard unit is sensitive in the range from 185 to 820 nm. Extended red-sensitive cathodes cover the 300 to 850 nm and the 300 to 900 nm range. A thermoelectrically cooled housing is available to reduce the dark count rate (recommended for red-sensitive versions).

The housing is available in three different versions. The OEM design contains no safety shutter. Standard PMA-M features a security shutter, which can be interlocked with e.g. a sample chamber lid. Cooled versions (PMA-C series) incorporate in addition an automatic overload detection function that closes the shutter in case of overillumination.

Signal output for all models is a standard 50 Ohms SMA connector. The module only needs a 12 V DC supply line, which is delivered in the PMA-M and PMA-C versions.