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08/25/2026
posted in Instrumentation
by lili
Hello CR4 Community,
In modern industrial processes, we heavily rely on high-precision instruments (such as flow meters, pressure transmitters, and t...
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08/20/2026
posted in Instrumentation
by lili
Electromagnetic vs ultrasonic flowmeters is a common comparison when selecting a flow measurement technology for industrial liquid applications. Both...
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08/19/2026
posted in Electrical Engineering
by Anonymous Poster
Been chasing this one for two days and need a sanity check.
Customer's αiSV 40/40 (A06B-6117-H105) throws SP1241 on spindle acceleration. Rando...
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08/18/2026
posted in Sustainable Engineering
by hydroflux
Every day, homes, apartments, offices, hotels, schools and commercial buildings generate wastewater. It comes from toilets, bathrooms, kitchens, washi...
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08/14/2026
posted in Electrical Engineering
by Anonymous Poster
The specification says, " LV Switchgear Bus bar temperature rise shall not exceed 45°C under rated current".
The ambient temperature is around 45...
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08/12/2026
posted in General Discussion
by Evelyn Li
Sharing a technical application on converting high-moisture industrial solid waste (ceramic residues, soil spoil, and waste gypsum) into high-strength...
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08/12/2026
posted in Manufacturing
by Rachana3
Copper nickel flanges are durable piping components made from a copper-nickel alloy, offering excellent resistance to corrosion, seawater, and high te...
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08/12/2026
posted in Manufacturing
by Radhika Solanki
450 BHN plates are a strong choice for heavy-duty applications where high wear resistance, impact strength, and durability are essential. They are com...
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08/12/2026
posted in Manufacturing
by Radhika Solanki
The best way to verify an ABREX 400 Plate is to check the Material Test Certificate (MTC), heat number, plate markings, manufacturer details, chemical...
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08/11/2026
posted in Electrical Engineering
by stancermtl
Too often, EMC is treated as something to verify after the layout, enclosure, cabling, and firmware are already fixed. By that stage, the available co...
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News for 08/24/2026
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07/31/2026
posted in Challenge Questions
Use the three white pieces to place the black king (e5) in checkmate.
* You do not need to simulate moves to arrive here.
* Abide standard chess pi...
07/31/2026
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06/30/2026
posted in Challenge Questions
Your friend makes a $250 bet with you.
He will pick a number between 1 and 1,000. If you can guess this number in 10 or less questions or guesses, yo...
06/30/2026
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05/31/2026
posted in Challenge Questions
Scenario
You are the on-call engineer for a hydrogen compressor skid. The control system has five sensors arranged in a serial telemetry chain. Each...
05/31/2026
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