Stacker LB 931 Microplate Stacker

Walk-away Solution

The Microplate Stacker can be used with the multi-detection readers Mithras and TriStar as well as the microplate fluorometer Twinkle.

A barcode reader provides positive plate identification making the system a true walk-away solution for microplate reading.



Various Plate Formats

The stacker can be operated with 24, 96, 384 and 1536 well plates of any height.


Exchangeable stacks can be loaded with either 25 or 50 microplates respectively.

Teachable Smart Gripping

The stacking height of the plate can be teached via software. The griping mechanism works in an active way ensuring that the gap between stacked plates is always found.


Once the microplates are read the stack of plates can be stacked back into the infeed stack and measured again as amyn times as needed enabling e.g. long-term monitoring of gene expression.

Plate Capacity

25 microplates (regular stack)

50 microplates (tall stack)

Microplate Formats

24, 96, 384 and 1536 well

outer dimensions: 86 x 128 mm

Supported Instruments

Mithras LB 940 multimode microplate reader

TriStar LB 941 multimode microplate reader

Twinkle LB 970 microplate fluorometer

Re-Stackingup to 7 days unattended operation
BarcodesCode 39, Interleaved 2 of 5, Codabar, EAN 128, UPC, EAN 8/13

25 plate stack:
500 x 700 x 610 mm (w x d x h)

50 plate stack:
500 x 700 x 960 mm (w x d x h)

OSWin XP, Win Vista, Win 7
RegulationsCE, UL, CSA



Barcode Reader

The optional barcode readers can be located to read the both short or the long front side of the microplates.

Both, positive plate identification and measurement parameter call-up can be connected to the barcodes.

Single Plate Device

A stack can be replaced by the Single Plate Device in case individual single plates have to be read.

Format Size
Bioanalytic Instruments - Product Portfolio Brief overview scope of supply Bioanalytic (June 2014) de, en PDF 693.31 KB
Mithras LB 940 Brochure 2010 de, en PDF 3.8 MB
Order Information Consumables & QC Test Devices Version Jan. 2017 de, en PDF 153.63 KB