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A4-PCR8（19400157）
Rotors are the part of a benchtop centrifuge that determines whether a given tube format can be processed at all. The A4-PCR8 is listed for the D2012S and holds four 0.2 mL PCR tubes.
Small PCR strip and tube work depends on a rotor that fits the tube geometry and the tube count a protocol actually uses. The A4-PCR8 is stated for use with the D2012S, with a rotor capacity of 4×0.2 mL PCR8 and a maximum speed of 15000 rpm.
The rotor material is given as zicral, an aluminium-zinc alloy family common in centrifuge rotors where strength-to-weight ratio matters. The model number is 19400157.
The listing pairs one rotor with one stated host instrument. That leaves several questions open for a buyer: whether the 15000 rpm figure applies to this rotor on the D2012S or to the centrifuge alone, and whether the capacity refers to four individual 0.2 mL tubes or a PCR8 strip format.
Rotor-to-instrument compatibility is not a detail that can be assumed from a model number. A rotor that physically seats may still carry a different rated speed, and the maximum safe speed is normally set by the combination of rotor and instrument.
For procurement, the practical checks are the rotor’s rated maximum on the D2012S, the tube or strip format it accepts, and whether documentation confirms the pairing. Material and capacity alone do not establish those points.
The sparse specification is itself the signal. Buyers should confirm the host instrument, tube format, and speed rating in writing before ordering.
Why it matters:
A rotor is a compatibility part, not a generic accessory. Verifying host instrument, format, and rated speed prevents mismatched purchases.
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