Iris features several improvements when compared to other gamma modules, including a proprietary full envelope radial, axial and torsional shock isolation system that protects the scintillator and pmt against damage caused by high g impacts and vibration. Iris also incorporates all pass through wires internally in the module to eliminate damage to exposed wiring and increases the mechanical stiffness of the module. Iris is form factor compatible with industry standard gamma modules and can be used in many mwd systems seamlessly. the standard output is a negative going 5v ttl signal, however custom output formats can be supported upon request, including serial, i2c, spi and can. Iris also has built in environmental monitoring and memory logging capabilities including the ability to store gamma ray counts, shock and vibration data, and multiple system voltages and temperature onto the on board non-volatile memory for post-run analysis.