Microphone sensitivity/frequency range: 65 mV/Pa; 5 Hz to 20 kHz. Mirror focusing factor: 2 to 1. Spectral range defined by window material (KBr standard): UV to 400 cm-1. Gain range: 2-10,000 in 12 steps. Maximum sample size: 10mm diameter x 8mm height. Provision for helium-purged and... Read more »