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Q
Which Perseus fan type fits each industry solution?
AUse axial DC fans when the enclosure needs direct airflow through boards, heat sinks, or electronics bays. Use centrifugal fans such as Prometheus or Atlas when the airflow path is narrow, bent, filtered, or high-impedance. Use 400Hz AC fans such as Titan when the equipment is built around aircraft or shipboard AC power. For large ground, naval, or radar cabinets, larger DC axial models such as Hyperpro and Archpro provide higher airflow volume and pressure margin. Final selection should be based on thermal load, pressure drop, voltage, noise, and environmental exposure.
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Q
How does altitude or low pressure affect cooling fan selection?
AAltitude reduces air density, so the same volumetric airflow carries less heat away from electronics. MIL-STD-810H Method 500.6 is the usual low-pressure planning reference, with procedures for storage, operation, rapid decompression, and explosive decompression. For airborne payloads and UAV electronics, review the fan P-Q curve at the expected pressure profile, the enclosure impedance curve, and the required temperature rise. Perseus specifications include low-pressure operating references on selected models, including 19.4 kPa operation for the Titan 400Hz AC reference model.
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Q
How should EMC be reviewed for fans near radar, EW, or communication receivers?
AFans near radar, EW, SIGINT, datalink, or communication receivers should be reviewed for both conducted and radiated emissions. CE102 is commonly used to evaluate conducted emissions on power leads from 10 kHz to 10 MHz, while RE102 evaluates radiated electric-field emissions from the unit and cables across the range defined by the platform test plan. Practical risk reduction comes from filtering, cable routing, shield termination, grounding strategy, and testing the fan in the same operating mode used by the host equipment.
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Q
What environmental protection should I specify for salt fog, rain, dust, and humidity?
AEnvironmental qualification can be planned against MIL-STD-810H. Program-specific conditions may include high and low temperature from -55°C to +85°C, temperature shock, humidity, salt fog per Method 509.7, fungus resistance, sand and dust ingress, rain, and immersion where applicable. IP67 and IP68 rated variants are available for applications requiring water ingress protection, with final exposure duration and acceptance criteria defined by the platform test plan.
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Q
What shock and vibration data matters for ground vehicle and shipboard cooling?
AThe useful vibration question is not only whether a fan has passed a generic test, but whether the test matches the platform spectrum. Ground vehicles may require tracked or wheeled-vehicle profiles under MIL-STD-810H Method 514.8, while shipboard systems often require sinusoidal vibration and shock review against the naval test plan. Provide mounting orientation, RMS level, frequency range, dwell requirements, and whether the fan is mounted directly to a panel, an electronics rack, or an isolator.
AUse axial DC fans when the enclosure needs direct airflow through boards, heat sinks, or electronics bays. Use centrifugal fans such as Prometheus or Atlas when the airflow path is narrow, bent, filtered, or high-impedance. Use 400Hz AC fans such as Titan when the equipment is built around aircraft or shipboard AC power. For large ground, naval, or radar cabinets, larger DC axial models such as Hyperpro and Archpro provide higher airflow volume and pressure margin. Final selection should be based on thermal load, pressure drop, voltage, noise, and environmental exposure.
