Autonics
SCM-US
USB to Serial Communication Converter (SCM-38I/SCM-US48I) Built-in Protection Circuit
Ultrasonic Sensor, Thru Beam, 24VDC, 20-60mm Detecting Distance, Analog, w/Cable, 3ms Response Time, Double Sheet and Seal Detection,(Optional: SUS nut: US-N2)
If you need to reliably detect double sheet or the heated seal of plastic bags, take a look!
The US-T04AN is an ultrasonic sensor with embedded amplifier and analog output. This sensor is not affected by color or the surface finish of the detected object.
Other features: