General Purpose vs. Low Frequency Accelerometers
OVERVIEW:
- CTC’s AC102 Sensors provide a 100 mV/g output over the range of 0.5-15,000 Hz (± 3dB).
- The AC102 is compatible with thousands of applications and is a multipurpose accelerometer.
- CTC’s AC133 and AC153 Series Sensors provide a 500 mV/g output over the range of 0.1 to
10,000 Hz (± 3dB). - The AC133 and AC153 are specifically designed for low-speed rotors, main bearings, and gearbox
inputs, but also can be used for high-frequency detection (up to 600,000 CPM).
SENSITIVITY:
Most general-purpose accelerometers have a nominal sensitivity of 100 mV/g. Low-frequency sensors however have a greater output sensitivity of 500 mV/g and some that are larger at 1000 mV/g. The larger mV/g output gives the sensor sufficient voltage signals, which will improve its ability to read low amplitude vibration signals down to 0.1 Hz at 3dB. Most low-frequency measurements are associated with low levels of vibration.
When the main bearing has a rotational frequency that is less than 30 CPM (0.5 Hz) it often requires the use of a low-frequency accelerometer. The AC102 has a frequency response of 30 to 900,000 CPM (0.5-15k Hz) and does not have the capability of providing accurate readings on slow-moving applications. The low-frequency accelerometers have a frequency response of 6 to 600,000 CPM (0.1-10k Hz), this provides the ability to monitor low frequency and low amplitude vibration levels. These accelerometers are specifically designed to enable pure low-frequency measurements and use high-frequency detection and analysis techniques all in one hermetically sealed sensor.
TYPICAL FREQUENCY RESPONSES:
Overall, both sensors offer a great frequency response and can be used for many applications. The AC102 is a perfect sensor for almost all applications, but when the frequency is below 30 CPM, the AC133 and AC153 could be the best option.
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CTC is the world leader in the design and manufacture of industrial accelerometers and piezo velocity transducers, 4-20 mA vibration sensors, and proximity probe sets, as well as all related mounting hardware, cables and connectors, and junction boxes. Our products enable efficient vibration monitoring for predictive maintenance in a wide variety of industries. Industries served include cement, mining, petrochemical, food & beverage, auto, steel, wind, paper & pulp, power generation, water & wastewater treatment, pharmaceutical, hospitals, bottling, and more. Our mission is to offer the widest variety of accelerometers and vibration hardware products, which are compatible with data collectors and online monitoring systems, as well as the tools for installation.
The CTC product line features vibration analysis hardware for heavy industry. All CTC products are backed by our unconditional, lifetime warranty. If any CTC product should ever fail, we will repair or replace it at no charge.
CTC’s PRO Line offers the world’s most durable and reliable Proximity Probe Sets including drivers, probes, extension cables, and driver enclosures for 24/7 protection of critical machinery in the most demanding industrial environments. CTC PRO Line Proximity Probe Sets are compatible with all major data collectors. PRO Line products are covered by our best-in-class lifetime warranty on material and workmanship.
The TMP line features vibration analysis hardware for research and development. All TMP products are backed by a five-year warranty on materials & workmanship for standard sensors and a two-year warranty for all accessories, cables, connectors, and custom & private-labeled products.
CANCELLATION POLICY:
Stock, built-to-order, and private-label products qualify for free cancellation only if cancelled within 24 hours of order entry.
After 24 hours of order entry:
- Stock products will be subject to a 25% cancellation fee
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If you wish to cancel an order, please reach out to your CTC sales representative. The timestamp of when your email requesting cancellation was received will be honored for whether or not your request meets the free cancellation window.
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All stock products may be returned for a 25% restocking fee if returned in new and unused condition within 90 days of shipment.
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