Bidirectional pipeline pig signaling device
Bulk material container with a rigid follower
Device for locating in buildings the exact position of hidden ob
Differential pressure indicator
Dual magnetic register for a utility meter
Indicator device
Indicator device with calibration means
Iron core for the magnetic induction of a visual information dis
Magnetic field indicator
Mechanical meter tampering indicator
Occupancy indication device and method
Robotic control apparatus
Rotor for electromagnetic indicator