1. www.hvac.vn Vibration Sensors The materials included in this compilation are for the use of Dwyer Instruments, Inc. potential customers and current employees as a resource only. They may not be reproduced, published, or transmitted electronically for commercial purposes. Furthermore, the Company’s name, likeness, product names, and logos, included within these compilations may not be used without specific, written prior permission from Dwyer Instruments, Inc. ©Copyright 2014 Dwyer Instruments, Inc.

2. www.hvac.vn Overview VBS – Vibration Switch VBT – Vibration Transmitter

3. www.hvac.vn VBS - Introduction Designed to continuously monitor changes in a machine’s vibration level Small, compact, and uses two easy set up dials that adjust the maximum RMS velocity set point and false trip time delay Purchase by Vrms range

4. www.hvac.vn VBS – Key Specifications Housing Material: PBT, PC, FPM, and 316 SS Accuracy: < ±3%. Measuring Range: 0 to 50 mm/s Enclosure Rating: NEMA 6 (IP67) Output Signal: 4 to 20 mA. Switch Type: PNP NO (500 mA max) Agency Approval: CE

5. www.hvac.vn VBT - Introduction Continuously detects the vibration in a system and monitors for unusual operating conditions and potential failure Requires no setup, and there is no software required for configuration

6. www.hvac.vn VBT - Key Specifications Housing Material: 316 SS Accuracy: < ±3% Enclosure Rating: NEMA 6 (IP68) Electrical Rating: 9.6 to 32 VDC Frequency Range: 10 to 1000 Hz Output Signal: 4 to 20 mA Agency Approval: CE

7. www.hvac.vn Applications Vibration switches are used to detect failures in bearing, motors, drives, or other machinery where high vibration is not normal Vibration transmitters are used to monitor normal operating conditions, and give indication when machinery may be starting to wear out or fail

8. www.hvac.vn Applications Vibration transmitter used to monitor vibration levels in large cooling tower fan in order to balance and align fan blades

9. www.hvac.vn Applications Vibration switch used to monitor motor vibration to detect bearing failures

10. www.hvac.vn Applications Mounting The placement of the vibration sensor is critical to what is being monitored, be it axial or vertical vibrations