Description
Metrix 5485C-007-020 | High-Temperature Velocity Transducer
Product Introduction
When monitoring absolute vibration on heavy industrial gas turbines, exhaust fans, or compressors operating under extreme thermal stress, standard electronic sensors fail due to heat degradation. The Metrix 5485C-007-020 is not a conventional accelerometer requiring internal power conditioning; it is a rugged, self-generating moving-coil velocity transducer engineered specifically for high-temperature environments. Utilizing a zero-friction spring suspension and pure electromagnetic damping, it delivers continuous, highly repeatable velocity measurements where surface temperatures reach up to 375^\circC.
The specific -007-020 configuration features a factory-calibrated sensitivity of 150 mV/in/sec (5.91 mV/mm/sec) paired with a 20-foot integral stainless steel armored cable. Its hermetically sealed 416 stainless steel housing protects internal components from aggressive industrial atmospheres and high-g cross-axis vibration. Whether replacing an aging sensor on a combustion turbine or commissioning a fresh monitoring point, this unit drops straight into your existing vibration architecture.
5485C-007-020
Key Technical Specifications
| Parameter | Specification Metric |
| Device Category | High-Temperature Moving-Coil Velocity Transducer |
| Product Series | Metrix 5485C Platform |
| Sensitivity (-007 Option) | 150 mV/in/sec (5.91 mV/mm/sec), 105\ \Omega coil resistance |
| Cable Configuration (-020 Option) | 20 feet (6.1 m) of integral stainless steel armored cable |
| Operating Temperature Range | -54^\circC to +375^\circC (-65^\circF to +707^\circF) |
| Frequency Response | 15 Hz to 2000 Hz (\pm 3 dB passband) |
| Maximum g-Level / Displacement | 50 g peak max / 1.8 mm (70 mils) pk-pk max displacement |
| Enclosure Material & Sealing | 416 Stainless Steel housing, hermetically welded seal |
| Hazardous Area Approvals | CSA / UL / ATEX / IECEx Intrinsically Safe (Div 1 / Zone 0/1) & Div 2 options |
Application Scenarios & Pain Points
- Heavy Industrial Gas Turbines: Hot-end turbine casings routinely exceed standard sensor thermal limits. The 5485C tracks casing vibration accurately right near combustion zones without electronic burnout.
- Furnace and Boiler Induced Draft Fans: High ambient air temperatures and continuous operational vibration cause premature failure in piezoelectric sensors; this moving-coil design thrives in high-heat draft configurations.
- High-Temperature Compressor Skids: Eliminates the need for cumbersome remote mounting brackets and cooling fins by mounting directly onto hot compressor surfaces.
QA & Live Testing SOP (Trust Signal)
We don’t warehouse precision vibration sensors without verifying coil resistance and mechanical suspension integrity; every 5485C-007-020 unit goes through our rigorous bench protocol:
- Visual & Armor Inspection: Inspected under magnification for stainless steel armor continuity, cable jacket health, and hermetic weld seam integrity.
- Coil Resistance & Isolation Audit: Multi-meter verified against baseline specifications (105\ \Omega coil resistance) alongside high-voltage megger isolation testing between the case and internal coil wiring.
- Dynamic Shaker Table Verification: Tested on a NIST-traceable calibration shaker to validate the 150 mV/in/sec velocity output curve across standard operating frequencies.
- Protective Packaging: Sealed inside heavy-duty anti-static moisture barriers and packed in high-density structural foam to prevent transit shock.
Field Engineer’s Pitfall Guide
- ❗ Rigid Bracket Construction: Ensure mounting brackets are thick and structurally rigid; thin or resonant brackets will introduce structural harmonics that skew high-frequency velocity readings.
- ❗ Integral Cable Routing: Route the 20-foot integral armored cable away from high-voltage motor leads or variable frequency drive (VFD) cables to prevent induced electromagnetic noise on unamplified low-level signals.
- ❗ Thermal Expansion Clearance: When securing the sensor to flat machined mounting pads using its four-bolt pattern, allow for thermal expansion differentials if installed on extreme temperature frames.
Intent-Driven FAQ
What does the “-007-020” suffix designate in part number 5485C?
The -007 designates the calibrated sensitivity option (150 mV/in/sec with a 105\ \Omega coil), and the -020 specifies a 20-foot integral stainless steel armored cable.
Does the Metrix 5485C require an external power supply?
No. It is a self-generating moving-coil velocity transducer that produces a native analog voltage signal proportional to vibration velocity, requiring no loop power or external power source.
Can the integral cable be detached or replaced in the field?
No. Because this model utilizes an integral cable configuration (-020), the armored cable is permanently affixed and hermetically sealed to the sensor body. For removable cable flexibility, check the base 5485C connector variant paired with a 4850 cable.
What is the preferred mounting orientation for this sensor?
The 5485C can be mounted in any axis orientation (horizontal, vertical, or angled) without affecting its static calibration or dynamic response.
What kind of warranty covers this surplus vibration sensor?
Every unit is backed by our comprehensive replacement guarantee, supported by multi-point pre-shipment bench testing to ensure absolute calibration accuracy out of the box.
