Which EMC (electromagnetic compatibility) devices are helpful for the design and modification of tonometers?

Non-contact tonometers require EMC handling of pulses and detection. A high-performance absorption circuit (e.g., a TVS diode and diode) must be connected in parallel across the high-speed solenoid valve coil that generates the air jet. The pressure sensor signal conditioning circuit should be shielded and use differential amplification to suppress common-mode noise. The photodiode and its preamplifier in the corneal reflection detection path must be designed for low noise and located away from the solenoid valve. The microcontroller precisely controls the timing of the jetting and detection, and the program performs multiple samplings and digital filtering of the detection signal. The device housing should be robust to minimize external vibration transmission, and the internal circuit boards should be securely fixed.