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7MH7146-0BA

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Siemens 7MH7146-0BA is a Milltronics MSP-3 heavy-duty high-temperature motion sensing probe that detects passing targets and sends speed pulses through a remote amplifier to an MFA controller.
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Technical specifications for 7MH7146-0BA

  • Manufacturer:
    Siemens
  • Part Number:
    7MH7146-0BA
  • Product Family:
    Siemens SITRANS / MultiRanger
  • Product Type:
    Milltronics MSP-3 High-Temperature Motion Sensing Probe
  • Stock:
    1
  • Probe Construction:
    Heavy-duty aluminum
  • Sensing Method:
    Non-contact motion pulse detection
  • Remote Amplifier:
    RMA required
  • Controller Path:
    MFA 4p through RMA
  • Cable Entry:
    1/2 in NPT
  • Standard Cable:
    1.5 m high-temperature cable
  • Extended Cable Option:
    2 to 30 m
  • Maximum Sensing Gap:
    Up to 100 mm
  • High-Temperature Operation:
    Up to 260 °C with remote amplifier
  • Target Motion:
    Rotating or reciprocating ferrous target
  • Installation Type:
    Flange-mounted probe
  • Area Classification:
    Ordinary / general-purpose location
  • Approvals:
    CE, C-TICK, CSAUS/C, and FM system approvals
  • Weight:
    5.02 lbs (2.277 kg)
  • Tariff Code:
    9029900000
  • Country of origin:
    Canada
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Probe Target Cable Ordering

Features:

  • The aluminum MSP-3 probe detects motion without contacting the rotating target.
  • A remote RMA amplifier conditions the probe pulses before they reach the MFA 4p controller.
  • The standard article includes a 1.5 m high-temperature lead and 1/2-inch NPT cable entry.
Siemens 7MH7146-0BA forms the sensing end of an MFA motion-monitoring chain.

Target clearance and alignment determine whether 7MH7146-0BA generates one consistent pulse for each passing feature.

The remote amplifier arrangement lets 7MH7146-0BA remain at the hot machine point while signal processing is mounted farther away.

The complete Siemens 7MH7146-0BA code identifies standard cable length, the MSP-3 probe model, and approval option A.
Siemens 7MH7146-0BA Milltronics MSP-3 Motion Probe Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

Probe, Amplifier, and Controller

  • Sensing point: The MSP-3 probe detects each passing ferrous target.
  • Amplifier stage: The RMA conditions the probe signal away from the hot installation point.
  • Controller stage: The MFA 4p compares the pulse rate with its configured motion setpoint.
  • Alarm path: The controller relays represent the resulting speed or motion condition.

Gap and Alignment

  • Target material: A suitable ferrous target must pass the sensing face.
  • Clearance: The gap must remain within the documented sensing range.
  • Alignment: The target path should cross the active face consistently.
  • Mechanical runout: Excessive shaft or target movement can vary the pulse amplitude.

High-Temperature Lead Arrangement

  • Standard lead: The article includes 1.5 m of high-temperature cable.
  • Extension: Documented ordering allows a total cable length from 2 to 30 m.
  • Entry thread: The probe uses a 1/2-inch NPT cable entry.
  • Routing: The lead should be protected from mechanical damage and hot moving parts.

Exact Probe Variant

  • First digit: Code 0 selects the standard cable-length arrangement.
  • Model letter: Code B selects the aluminum MSP-3 high-temperature probe.
  • Approval letter: Code A selects the listed approval option.
  • Variant control: The full 7MH7146-0BA number must remain intact during replacement.
Description
Siemens 7MH7146-0BA is a Milltronics MSP-3 heavy-duty high-temperature motion sensing probe for monitoring rotating or reciprocating equipment. The aluminum probe detects a passing ferrous target without mechanical contact and converts each pass into the signal used for motion or speed supervision.

The measurement chain for 7MH7146-0BA places an RMA remote amplifier between the probe and the MFA 4p controller. This separation keeps the amplifier away from the highest-temperature point while the controller compares incoming pulses with its configured underspeed or overspeed setpoint.

A 1/2-inch NPT cable entry and 1.5 m high-temperature lead form the standard connection of 7MH7146-0BA. The cable can be ordered in a documented extended length, while the probe flange and target clearance determine how reliably each rotating feature crosses the sensing field.

Within the Siemens ordering code, 7MH7146-0BA selects standard cable length, the MSP-3 aluminum high-temperature probe, and approval option A. That complete code distinguishes it from the stainless-steel MSP-9, general-purpose MSP-12, and hazardous-area XPP-5 probe constructions.
Alternative Names
7MH71460BA 7MH7146 0BA 7MH 7146 0BA Siemens 7MH7146-0BA 7MH7146-0BA MSP-3 Motion Probe 7MH7146-OBA 7MH7I46-0BA Siemens MSP-3 7MH7146 0BA
Technical notes
An RMA remote amplifier completes the signal path for Siemens 7MH7146-0BA before the pulses reach the MFA 4p motion controller.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
Why does 7MH7146-0BA produce no pulse while the shaft is rotating?
For 7MH7146-0BA, verify the ferrous target, sensing gap, face alignment, high-temperature lead continuity, RMA power, and the connection from the amplifier to the MFA controller.
What can cause unstable speed readings from 7MH7146-0BA?
Check the 7MH7146-0BA target spacing, shaft runout, probe vibration, cable shielding, RMA connections, and whether more than one metal feature passes the sensing face.
Why should the RMA amplifier not be omitted from a 7MH7146-0BA installation?
The 7MH7146-0BA is the probe element; its documented measurement chain uses the RMA to condition the signal before the MFA 4p evaluates pulse rate.
How should an extended cable be specified for 7MH7146-0BA?
Keep the full 7MH7146-0BA probe identity, then specify the documented total cable length within the permitted 2 to 30 m ordering range.
What should be checked if 7MH7146-0BA fails after operating near a hot process?
Inspect the 7MH7146-0BA probe body, cable exposure, entry sealing, remote-amplifier location, measured surface temperature, and whether the installed arrangement stays within the documented limit.
Can 7MH7146-0BA be replaced solely by matching the 7MH7146 family number?
No. Match 7MH7146-0BA to the MSP-3 aluminum body, standard cable option, approval code, thread, cable length, RMA path, and installation environment.

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