Catalog in PDF:
Catalog in PDF:
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Absolute vibration sensors
Any machines are affected by various deformation changes that are caused by changes in temperature and pressure. . These changes can be of significant magnitude, which appear when the machine is first started (not warmed up) or partially warmed up, as well as when changing load or stopping.
The quality of the operation of any unit (turbine, compressor, etc.) is more dependent on the state of the rotating parts of the machine, that is, the rotors. The most important condition for the smooth operation of any machine is that there should never be contact between the rotor (shaft) and the fixed parts of the machine. To control this condition, it is necessary to regularly measure the axial and radial clearances in the machine, under various severe operating conditions. Absolute and relative vibration sensors are used to control the position of the rotor.
Absolute vibration - vibration at a fixed point in space. Absolute vibration measurements are carried out on bearings, as well as in those places where the action of unbalanced rotor forces is manifested. Relative vibration (shaft vibration) is vibration between two moving parts (shaft-bearing).
Absolute vibration is measured by acceleration and speed sensors, usually the absolute vibration of the machine body is measured. These sensors are also called seismic.
Accelerometers series 200150 (200155, 200157)
They are piezoelectric broadband body sensors. The accelerometers are made in a hermetically sealed stainless steel case. The high-strength design of the sensors allows them to be used in heavy-duty industrial applications.
A 5-pin connector located at the top of the sensor allows you to quickly connect and disconnect the connecting signal cable. A 3/8-24 threaded hole on the bottom of the sensor housing provides multiple mounting options. Accelerometers of the 200150(20155,20157) series have a piezoelectric sensing element (piezocrystal) that generates a charge in the presence of vibrations. This charge is then electronically converted into a voltage proportional to the acceleration in the axial direction of the sensor.
Application of 200150(20155, 200157) series accelerometers:
200150 - standard channel for integrating vibration velocity into vibration acceleration. Application: in general purpose systems.
200155 - low-frequency channel for integrating vibration acceleration into vibration velocity. Application : low speed blade fans.
200157 - standard channel for integrating vibration acceleration into vibration velocity, using the envelope method Application: roller bearings
Sensors are ordered in various versions, depending on the adapters and mounting method.
330400 and 330425 Series Accelerometers (Vibration Sensors)
The 330400 and 330425 Series accelerometers are designed to protect critical equipment where vibration acceleration measurement is critical, such as gear monitoring.
If the vibration frequency of an enclosure is being measured for the purpose of general equipment protection, consideration should be given to the appropriateness of the measurement for each specific application. The most common machine failures (unbalance, misalignment, etc.) associated with the rotor cause an increase (or at least a change) in the vibration of the rotor.
In order for any independent measurement performed on the housing to be effective for the overall protection of the machine, it is necessary to ensure that the rotor vibration is transmitted to the bearing housing or equipment, to the sensor installation site with sufficient amplitude for measurement and without distortion.
In addition, attention must be paid directly to the installation of the sensor. Incorrect installation can result in degraded sensor performance or signals that do not match the actual vibration of the equipment.
For highly accurate vibration velocity measurements, the Velomitor® 330500 should be used.
Sensors are ordered depending on the mounting thread:
330400-01-EN female thread ¼-28 UNF
330400-02-EN internal thread M8 X 1
330425-01-RU female thread ¼-28 UNF
330425-02-EN internal thread M8 X 1
Piezo sensor Velomitor® 330500 (Velomitor)
Designed to measure the absolute vibration of bearing supports, machine housings.
The Velomitor® sensor has no moving parts in its design and consists of a one-piece piezoelectric element (piezocrystal) with a built-in electronic integrator circuit. Due to the absence of moving parts, the sensor is not subject to mechanical wear and can be installed vertically, horizontally, or oriented at any other angle.
If the vibration frequency of the housing is measured to protect
equipment, consideration should be given to the appropriateness of the measurement for each specific application. The most common machine failures (unbalance, misalignment, etc.) associated with the rotor cause an increase (or at least a change) in the vibration of the rotor.
For any single measurement on the housing to be effective in protecting the entire machine, a significant portion of the rotor vibration must be fully transmitted to the bearing housing or to the machine housing where the sensor is mounted.
Piezo sensor Velomitor 330500 is ordered depending on the adapter for the mounting thread:
330500-01-RU 330500-05-RU
330500-02-RU 330500-06-RU
330500-03-RU 330500-07-RU
330500-04-RU 330500-08-RU
Connecting cable is also available to order depending on the length (ft)
200350 and 200355 Series Accelerometers
They are general purpose piezoelectric broadband transducers designed to work with Trendmaster direct input cards. Pro for DC sensors. Accelerometers of the 200350 and 200355 series are made in a hermetically sealed stainless steel case.
The high-strength design of the sensors allows them to be used in intensive industrial operation. A 2-pin connector (MIL-C-5015) located at the top of the sensor allows for quick connection and disconnection of the connecting signal cable.
A ¼-28 threaded hole on the bottom of the sensor housing provides multiple mounting options.
The accelerometers of the 200350 and 200355 series have a piezoelectric sensing element (piezocrystal) that generates a charge in the presence of vibrations. This charge is then electronically converted into a voltage proportional to the acceleration in the axial direction of the sensor.
Sensors are ordered depending on the fasteners used:
200350-00-00-RU 200350-10-00-RU 200355-00-00-RU 200355-10-00-RU
200350-01-00-RU 200350-11-00-RU 200355-01-00-RU 200355-11-00-RU
200350-02-00-RU 200350-12-00-RU 200355-02-00-RU 200355-12-00-RU
Both armored 84661-AA and unarmoured 9571-AA are available on request, with a maximum cable length of 99 (96 lbs)
330450 Series Accelerometers
The standard 330400 series accelerometers have a limited temperature range, as their electronic components are in the same housing as the sensing element.
The maximum operating temperature of such sensors is limited to +121°C.
The design of the vibration acceleration measurement system 330450 provides for the separation of the housings of the sensing element and the electronic component block, interconnected by a special rigid cable. Currently, the sensing element can be installed on surfaces with temperatures up to +400°C. The performance of the 330450 systems is comparable to other accelerometers, but allows the system to be used in higher temperature environments.
The absence of detachable connections between the sensing element and the electronic unit avoids possible failures associated with such a connection.
Sensors are ordered depending on the cable length:
330450-20 (2m)
330450-40 (4m)
330450-60 (6m)
330450-80 (8m)
Standard Cable 16925-AA* - 22 AWG (0.5 mm2) 3-core shielded cable with a 3-pin connector on one end and cable lugs on the other.
Min. length 2.0 ft (0.6m), max. length 99 feet (30m)
Standard Armored Cable 16710-AA* - 22 AWG (0.5 mm2) 3-core shielded armored cable with a 3-pin connector on one end and cable lugs on the other.
Min. length 3.0 ft (0.9m), max. length 99 feet (30m).
High-temperature vibration velocity and vibration acceleration sensors
350900 series
The 350900 High Temperature Sensors provide a continuous vibration velocity signal for use in machinery protection, as well as a vibration acceleration signal for diagnostic purposes.
The sensors are originally designed for use with the 3500/42M and 3500/44M monitors. When connecting sensors to the 3500/42M or 3500/44M modules, you must use the sensor's vibration velocity and vibration acceleration signals on separate channel pairs (eg channels 1 and 3) on different monitors.
The design of sensors 350900 provides for the separation of the housings of the sensitive piezoelectric element and the block of electronic components, interconnected by a special rigid cable.
Currently, the sensing element can be installed on surfaces with temperatures up to +482°C. This design makes it possible to install the electronic component box in an area with a lower temperature. The performance of the 350900 sensors is comparable to other hull vibration sensors, but allows the system to be used in higher temperature environments.
The absence of detachable connections between the sensing element and the electronic unit avoids possible failures associated with such a connection.
The main features of the 350900 sensors:
• Issuance of vibration velocity and vibration acceleration signals
• Operating temperature of the sensing element: up to +482°C
• Electronic component box operating temperature: +125°C but can withstand temperatures up to +155°C
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