Zurich Instruments offers a unit for state detection with hardware triggers and associated logical operations on lock-in amplifier and PID controller measurements. The MF Threshold Unit is included with every MFLI Lock-in Amplifier and MFIA Impedance Analyzer; additional upgrades such as the MF-PID Quad PID/PLL Controller and the MF-MD Multi-Demodulator options extend an instrument's functionalities even further.
The Threshold Unit performs logical analysis on measurement data in real time. Starting from the analog or logical measurement data, users can define multiple operations to detect specific conditions and trigger a reaction via a TTL output.