TENMARS TM-4100D Tachometer contact / non-contact USB datalogger up to 30000⊕IK
USB datalogger up to 30,000 data (TM-4100D). TM-4100D (USB Datalogger). USB datalogger: 30,000 data sets. Output the red visible-spectrum light containing the signal to the tape or plate and receiving the signal from the reflective light.