Magnetic vibration sensor 544M

moving coil

The IRD Model 544M velocity transducer is a seismic velocity-type transducer with a moving coil in a permanent magnetic field. The Model 544M mounts permanently on a flat surface at the bearing housing or other critical point on a machine and provides reliable continuous performance under a variety of adverse environmental conditions. Its high output and low impedance, wide frequency response, and rugged construction make the 544M suitable for all types of machinery monitoring applications. In addition, a hard anodized aluminum case insulates the signal coil from the housing to eliminate false monitor alarms often encountered from ground loops and power surges in many field installations. The 544M is waterproof and acceptable for use in Division 2 hazardous areas. Installation: 1. The sensitive axis may be oriented in any direction. 2. The mounting surface must be flat and smooth. 3. Use four M6 x 25mm (¼ x 1”) machine screws. 4. Connector Pin A is signal ground; connector Pin B is signal. GENERAL SPECIFICATIONS Frequency Response 14 to 1,000 Hz within ±8% @ 70° F (21° C) Sensitivity 1080 ± 10% mV/in/s (42.52 mV/mm/s) Maximum Amplitude 125 mils pk-pk to 70 Hz 30 g above 70 Hz Impedance R=2 k L= 0.7H @ 70° F (21° C) Magnetic Field Sensitivity 0.15 in/s/Gauss Damping Factor 0.7 (critical) @ 70° F (21° C) Transverse Response Less than 5% (average) between 10 and 1,000 Hz Housing Waterproof and Dustproof Connector 2-pin (10SL-4P) Isolation Floating signal coil insulated from case Mounting Four (4) holes 9/32” dia. (7.1 mm) on 2” x 2” centers Mounting Orientation Any Weight 1.5 lbs. (0.68 kg) Temperature Range -40° to 500° F (-40° to 260° C)