Your search for "radiometric mass flowmeters" revealed the following:

Rosemount 614 Cryogenic Spot Temperature Sensor
Rosemount 614 temperature sensor for LNG storage tanks
Endress+Hauser CAS51D digital nitrate SAC sensor
Endress+Hauser Condumax CLS16B conductivity sensor
Endress+Hauser CLS16B conductivity sensor front view
Rosemount 0085 Pipe Clamp Temperature Sensor for industrial temperature measurement
Rosemount 0085 RTD Temperature Sensor with platinum sensing element
Yokogawa EJXC80A EJAC80E Diaphragm Seal System
Yokogawa EJXC80A EJAC80E remote mount flanged diaphragm seal system
Endress+Hauser Memosens CCS55E free bromine sensor