190501-09-99-05 Bently Nevada Velomitor CT Velocity Transducer
Description
The Velomitor CT (Cooling Tower) is a piezoelectric velocity transducer, designed particularly for low-frequency vibration measurement on cooling towers,
air-cooled heat exchangers, fan assemblies, or other rotating machinery with relatively low speeds (e.g. ≥ 90 rpm).
It is a specialized version of the standard Velomitor sensor, tuned for slower rotating
machines and capable of measuring vibration velocities
(rather than displacement or acceleration).
190501-09-99-05 Details
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FAQ
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Q1: What does “CT” in Velomitor CT stand for?
A: “CT” commonly refers to “Cooling Tower” or “Cooling Tower / low-speed” variant.
This version is tuned for lower frequencies and slower rotating machinery
(e.g. fan speeds) that the standard Velomitor
might not optimally detect.
Q2: What is the lowest frequency this sensor can reliably measure?
A: In its ±3 dB bandwidth, it can go down to about 1.5 Hz (≈ 90 cycles per minute).
In the tighter ±1 dB band, it is around 3.0 Hz.
Q3: What is the sensitivity and signal output?
A: Typical sensitivity is 3.94 mV per mm/s (±5 %). That corresponds
to about 100 mV per in/s.
Q4: What is the maximum measurable velocity amplitude?
A: The datasheet lists a typical maximum broadband
velocity of 63.5 mm/s (≈ 2.5 in/s) pk.
Q5: How long can the signal cable be?
A: Up to 305 m (1,000 ft) of cable (e.g. Bently part
02173006) is supported without
significant signal loss.
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Inquiry now: miya@mvme.cn
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