The SMB-I016 can be identified by its flat rather than bevelled metal ring that surrounds the IR filter. The filter has a ((🤚)) print similar to the DS-K7P03 but only two (( on either side.
Modulation is 37.31 kHz with a signal made up of 5 pulses with on time of about 5.098 mS and an off time of about 5.110 mS followed by a gap of 56.141 mS before the signal repeats.
A quick test recording this and playing it back with a flipper zero did not trigger the sensor so it seems that the time between sent and received signal is checked.
A pulseview recording of this signal, made using a TSMP58000, can be found in the /sigrok/smb-i016 directory.
