The pressure differential is typically measured using diaphragm pressure transducers with digital readout. Then the frequency can be read from the calibrated readout on the stroboscope. The irradiance is limited by the time resolution of its associated detector readout electronics. Some actuators include an encoder and digital position readout. It featured direct mechanical digital frequency readout. The instrument panel was electrical with a self diagnosis system and digital speed readout. These featured mechanical filters, very accurate frequency readout, and excellent stability. Fluorescence tags are used to give visual readout on a protein. Some recent versions use digital readout instead of a magnetic pointer. It uses copper wiring for high-speed data readout. Electrical conductivity meters with direct readout in %IACS are commercially available. The counts readout is normally used when alpha or beta particles are being detected. It utilized a Nixie-tube readout and provided a resolution of 1/1000 second. The bottom screen is used as a map and weapons readout. A digital readout on the dashboard shows the player's score.