Vibration Meters, Tachometers
VIBRATION METERS and NON-CONTACT TACHOMETERS are widely used in inspection, manufacturing, production, laboratory and R&D.
To download catalog for our SADT brand metrology and test equipment, please CLICK HERE.In this catalog you will find some high quality vibration meters and tachometers.
The vibration meter is used to measure vibrations and oscillations in machines, installations, tools or components. Measurements of the vibration meter provides the following parameters: vibration acceleration, vibration velocity and vibration displacement. This way the vibration is recorded with great precision. They are mostly portable devices and the readings can be stored and retrieved for later use. Critical frequencies which can cause damage or disturbing noise level may be detected using a vibration meter. We sell and service a number of vibration meter and non-contact tachometer brands including SINOAGE, SADT. Modern versions of these test instruments are capable of simultaneously measuring and recording a variety of parameters such as temperature, humidity, pressure, 3-axis acceleration and light; their data logger record over millions of measured values, have optional microSD cards making the able to record even over a billion measured values. Many have selectable parameters, housings, external sensors, and USB-interfaces. WIRELESS VIBRATION METERS provide the comfort of transmitting data wirelessly from the tested machine to the receiver for inspection and analysis. VIBRATION TRANSMITTERS are perfect solutions for continuous monitoring. A vibration transmitter can be used for vibration monitoring of equipment in remote or hazardous locations. They are designed in rugged NEMA 4 rated cases. Programmable version are available. Other versions include the POCKET ACCELEROMETER to measure vibration velocity in machines and installations. MULTICHANNEL VIBRATION METERS to perform vibration measurements on multiple places at the same time. The vibration velocity, acceleration and expansion in a wide frequency range can be measured. The cables of the vibration sensors are long, so the vibration measuring device is able to record vibrations at different points of the component to be tested.
Many vibration meters are used primarily to determine vibrations in machines and installations revealing vibration acceleration, vibration velocity and vibration displacement. With the help of these vibration meters, the technicians are able to quickly determine the current state of the machine and the causes of the vibrations, and make the necessary adjustments and assess new conditions afterwards. However some vibration meter models can be used in the same way, but they also have functions to analyze the FAST FOURIER TRANSFORM (FFT) and display if any specific frequencies are occurring within the vibrations. These are used preferably for investigation development of machines and installations or to take measurements over a period of time in a test environment. The Fast Fourier Transform (FFT) models can also determine and analyze the 'Harmonics' with ease and precision. Vibration meters are normally used for the control rotational axis of machinery so the technicians are able to determine and evaluate the development of an axis with accuracy. In cases of emergency, the axis may be modified and changed during a scheduled pause of the machine. Many factors can cause excessive vibration in rotating machinery such as worn out bearings and couplings, foundation damage, broken mounting bolts, misalignment and unbalance. A well scheduled vibration measurement procedure helps to detect and eliminate these failures early on before any serious machine problems occur.
A TACHOMETER (also called a revolution-counter, RPM gauge) is an instrument that measures the rotation speed of a shaft or disk, as in a motor or machine. These devices display the revolutions per minute (RPM) on a calibrated analogue or digital dial or display. The term tachometer is usually restricted to mechanical or electrical instruments that indicate instantaneous values of speed in revolutions per minute, rather than devices that count the number of revolutions in a measured time interval and indicate only average values for the interval. There are CONTACT TACHOMETERS as well as NON-CONTACT TACHOMETERS (also referred to as a PHOTO TACHOMETER or LASER TACHOMETER or INFRARED TACHOMETER depending on the light source used). Yet some others are referred to as COMBINATION TACHOMETERS combining a contact and photo tachometer in one unit. Modern combination tachometers show reverse direction characters on display depending on contact or photo mode, use visible light to read several inches of distance from target, the memory/readings button holds the last reading and recalls min/max readings. Just as with vibration meters, there are many models of tachometers including multi-channel instruments for measuring speed at multiple locations simultaneously, wireless versions for providing information from remote locations….etc. RPM ranges for modern instruments vary from a few RPMs to hundred or hundreds of thousands of RPM values, they offer automatic range selection, auto-zero adjustment, values such as +/- 0.05% accuracy.
Our vibration meters and non-contact tachometers from SADT are:
Portable Vibration Meter SADT Model EMT220 : Integrated vibration transducer, annular shear type acceleration transducer (only for integrated type), separate, built-in electric charge amplifier, shear type acceleration transducer (only for separate type), temperature transducer, type K thermoelectric couple transducer (only for EMT220 with temperature measuring function). Device has root mean square detector, vibration measurement scale for displacement is 0.001~1.999 mm (peak to peak), for velocity is 0.01~19.99 cm/s (rms value), for acceleration is 0.1~199.9 m/s2 (peak value), for vibration acceleration is 199.9 m/s2 (peak value). Temperature measurement scale is -20~400°C (only for EMT220 with temperature-measuring function). Accuracy for vibration measurement: ±5% Measurement value ±2 Digits. Temperature measurement: ±1% Measurement value ±1 Digit, Vibration Frequency Range: 10~1 kHz (Normal type) 5~1 kHz (Low frequency type) 1~15 kHz (only at “HI” position for acceleration). Display is liquid crystal display (LCD), Sample period: 1 second, vibration measurement value readout: Displacement: Peak to peak value (r.m.s.×2squareroot2), Velocity: Root mean square (r.m.s.), Acceleration: Peak value (r.m.s.×squareroot 2), Readout-keeping function: Readout of vibration / temperature value can be remembered after releasing the Measure Key (Vibration / Temperature Switch), Output Signal: 2V AC (peak value) (load resistance above 10 k at full measuring scale), Power supply: 6F22 9V laminated cell, battery life about 30 hours for continuous use, Power on / off: Power up when pressing Measure Key (Vibration / Temperature Switch), power automatically shuts off after releasing the Measure Key for one minute, Operating conditions: Temperature: 0~50°C, Humidity: 90% RH , Dimensions:185mm×68mm×30mm, Net weight:200g
Portable Optical Tachometer SADT Model EMT260 : Unique ergonomic design provides direct line-of-sight viewing of display and target, easily readable 5 digit LCD display, on-target and low battery indicator, maximum, minimum and last measurement of rotational speed, frequency, cycle, linear speed and counter. Speed Ranges: Rotational speed:1~99999r/min, Frequency: 0.0167~1666.6Hz, Cycle:0.6~60000ms, Counter:1~99999, Linear speed:0.1~3000.0m/min, 0.0017~16.666m/s, Accuracy:±0.005% of reading, Display:5 digit LCD display, Input signal:1-5VP-P Pulse Input, Output signal: TTL compatible Pulse Output, Power:2x1.5V batteries, Dimensions (LxWxH): 128mmx58mmx26mm, Net weight:90g
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